Merge "Enable configuration to supply options for Special:Search form"
[lhc/web/wiklou.git] / tests / phpunit / includes / title / NamespaceInfoTest.php
index 21b6468..b1262a3 100644 (file)
  * @file
  */
 
-use MediaWiki\MediaWikiServices;
+use MediaWiki\Config\ServiceOptions;
 
 class NamespaceInfoTest extends MediaWikiTestCase {
+       /**********************************************************************************************
+        * Shared code
+        * %{
+        */
+       private $scopedCallback;
 
-       /** @var NamespaceInfo */
-       private $obj;
-
-       protected function setUp() {
+       public function setUp() {
                parent::setUp();
 
-               $this->setMwGlobals( [
-                       'wgContentNamespaces' => [ NS_MAIN ],
-                       'wgNamespacesWithSubpages' => [
-                               NS_TALK => true,
-                               NS_USER => true,
-                               NS_USER_TALK => true,
-                       ],
-                       'wgCapitalLinks' => true,
-                       'wgCapitalLinkOverrides' => [],
-                       'wgNonincludableNamespaces' => [],
-               ] );
-
-               $this->obj = MediaWikiServices::getInstance()->getNamespaceInfo();
-       }
+               // Boo, there's still some global state in the class :(
+               global $wgHooks;
+               $hooks = $wgHooks;
+               unset( $hooks['CanonicalNamespaces'] );
+               $this->setMwGlobals( 'wgHooks', $hooks );
 
-       /**
-        * @todo Write more texts, handle $wgAllowImageMoving setting
-        * @covers NamespaceInfo::isMovable
-        */
-       public function testIsMovable() {
-               $this->assertFalse( $this->obj->isMovable( NS_SPECIAL ) );
+               $this->scopedCallback =
+                       ExtensionRegistry::getInstance()->setAttributeForTest( 'ExtensionNamespaces', [] );
        }
 
-       private function assertIsSubject( $ns ) {
-               $this->assertTrue( $this->obj->isSubject( $ns ) );
-       }
+       public function tearDown() {
+               $this->scopedCallback = null;
 
-       private function assertIsNotSubject( $ns ) {
-               $this->assertFalse( $this->obj->isSubject( $ns ) );
+               parent::tearDown();
        }
 
        /**
-        * Please make sure to change testIsTalk() if you change the assertions below
-        * @covers NamespaceInfo::isSubject
+        * TODO Make this a const once HHVM support is dropped (T192166)
         */
-       public function testIsSubject() {
-               // Special namespaces
-               $this->assertIsSubject( NS_MEDIA );
-               $this->assertIsSubject( NS_SPECIAL );
-
-               // Subject pages
-               $this->assertIsSubject( NS_MAIN );
-               $this->assertIsSubject( NS_USER );
-               $this->assertIsSubject( 100 ); # user defined
-
-               // Talk pages
-               $this->assertIsNotSubject( NS_TALK );
-               $this->assertIsNotSubject( NS_USER_TALK );
-               $this->assertIsNotSubject( 101 ); # user defined
+       private static $defaultOptions = [
+               'AllowImageMoving' => true,
+               'CanonicalNamespaceNames' => [
+                       NS_TALK => 'Talk',
+                       NS_USER => 'User',
+                       NS_USER_TALK => 'User_talk',
+                       NS_SPECIAL => 'Special',
+                       NS_MEDIA => 'Media',
+               ],
+               'CapitalLinkOverrides' => [],
+               'CapitalLinks' => true,
+               'ContentNamespaces' => [ NS_MAIN ],
+               'ExtraNamespaces' => [],
+               'ExtraSignatureNamespaces' => [],
+               'NamespaceContentModels' => [],
+               'NamespaceProtection' => [],
+               'NamespacesWithSubpages' => [
+                       NS_TALK => true,
+                       NS_USER => true,
+                       NS_USER_TALK => true,
+               ],
+               'NonincludableNamespaces' => [],
+               'RestrictionLevels' => [ '', 'autoconfirmed', 'sysop' ],
+       ];
+
+       private function newObj( array $options = [] ) : NamespaceInfo {
+               return new NamespaceInfo( new ServiceOptions( NamespaceInfo::$constructorOptions,
+                       $options, self::$defaultOptions ) );
        }
 
-       private function assertIsTalk( $ns ) {
-               $this->assertTrue( $this->obj->isTalk( $ns ) );
-       }
+       // %} End shared code
 
-       private function assertIsNotTalk( $ns ) {
-               $this->assertFalse( $this->obj->isTalk( $ns ) );
-       }
+       /**********************************************************************************************
+        * Basic methods
+        * %{
+        */
 
        /**
-        * Reverse of testIsSubject().
-        * Please update testIsSubject() if you change assertions below
-        * @covers NamespaceInfo::isTalk
+        * @covers NamespaceInfo::__construct
+        * @dataProvider provideConstructor
+        * @param ServiceOptions $options
+        * @param string|null $expectedExceptionText
         */
-       public function testIsTalk() {
-               // Special namespaces
-               $this->assertIsNotTalk( NS_MEDIA );
-               $this->assertIsNotTalk( NS_SPECIAL );
-
-               // Subject pages
-               $this->assertIsNotTalk( NS_MAIN );
-               $this->assertIsNotTalk( NS_USER );
-               $this->assertIsNotTalk( 100 ); # user defined
+       public function testConstructor( ServiceOptions $options, $expectedExceptionText = null ) {
+               if ( $expectedExceptionText !== null ) {
+                       $this->setExpectedException( \Wikimedia\Assert\PreconditionException::class,
+                               $expectedExceptionText );
+               }
+               new NamespaceInfo( $options );
+               $this->assertTrue( true );
+       }
 
-               // Talk pages
-               $this->assertIsTalk( NS_TALK );
-               $this->assertIsTalk( NS_USER_TALK );
-               $this->assertIsTalk( 101 ); # user defined
+       public function provideConstructor() {
+               return [
+                       [ new ServiceOptions( NamespaceInfo::$constructorOptions, self::$defaultOptions ) ],
+                       [ new ServiceOptions( [], [] ), 'Required options missing: ' ],
+                       [ new ServiceOptions(
+                               array_merge( NamespaceInfo::$constructorOptions, [ 'invalid' ] ),
+                               self::$defaultOptions,
+                               [ 'invalid' => '' ]
+                       ), 'Unsupported options passed: invalid' ],
+               ];
        }
 
        /**
-        * @covers NamespaceInfo::getSubject
+        * @dataProvider provideIsMovable
+        * @covers NamespaceInfo::isMovable
+        *
+        * @param bool $expected
+        * @param int $ns
+        * @param bool $allowImageMoving
         */
-       public function testGetSubject() {
-               // Special namespaces are their own subjects
-               $this->assertEquals( NS_MEDIA, $this->obj->getSubject( NS_MEDIA ) );
-               $this->assertEquals( NS_SPECIAL, $this->obj->getSubject( NS_SPECIAL ) );
-
-               $this->assertEquals( NS_MAIN, $this->obj->getSubject( NS_TALK ) );
-               $this->assertEquals( NS_USER, $this->obj->getSubject( NS_USER_TALK ) );
+       public function testIsMovable( $expected, $ns, $allowImageMoving = true ) {
+               $obj = $this->newObj( [ 'AllowImageMoving' => $allowImageMoving ] );
+               $this->assertSame( $expected, $obj->isMovable( $ns ) );
        }
 
-       /**
-        * Regular getTalk() calls
-        * Namespaces without a talk page (NS_MEDIA, NS_SPECIAL) are tested in
-        * the function testGetTalkExceptions()
-        * @covers NamespaceInfo::getTalk
-        */
-       public function testGetTalk() {
-               $this->assertEquals( NS_TALK, $this->obj->getTalk( NS_MAIN ) );
-               $this->assertEquals( NS_TALK, $this->obj->getTalk( NS_TALK ) );
-               $this->assertEquals( NS_USER_TALK, $this->obj->getTalk( NS_USER ) );
-               $this->assertEquals( NS_USER_TALK, $this->obj->getTalk( NS_USER_TALK ) );
+       public function provideIsMovable() {
+               return [
+                       'Main' => [ true, NS_MAIN ],
+                       'Talk' => [ true, NS_TALK ],
+                       'Special' => [ false, NS_SPECIAL ],
+                       'Nonexistent even namespace' => [ true, 1234 ],
+                       'Nonexistent odd namespace' => [ true, 12345 ],
+
+                       'Media with image moving' => [ false, NS_MEDIA, true ],
+                       'Media with no image moving' => [ false, NS_MEDIA, false ],
+                       'File with image moving' => [ true, NS_FILE, true ],
+                       'File with no image moving' => [ false, NS_FILE, false ],
+               ];
        }
 
        /**
-        * Exceptions with getTalk()
-        * NS_MEDIA does not have talk pages. MediaWiki raise an exception for them.
-        * @expectedException MWException
-        * @covers NamespaceInfo::getTalk
+        * @param int $ns
+        * @param bool $expected
+        * @dataProvider provideIsSubject
+        * @covers NamespaceInfo::isSubject
         */
-       public function testGetTalkExceptionsForNsMedia() {
-               $this->assertNull( $this->obj->getTalk( NS_MEDIA ) );
+       public function testIsSubject( $ns, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->isSubject( $ns ) );
        }
 
        /**
-        * Exceptions with getTalk()
-        * NS_SPECIAL does not have talk pages. MediaWiki raise an exception for them.
-        * @expectedException MWException
-        * @covers NamespaceInfo::getTalk
+        * @param int $ns
+        * @param bool $expected
+        * @dataProvider provideIsSubject
+        * @covers NamespaceInfo::isTalk
         */
-       public function testGetTalkExceptionsForNsSpecial() {
-               $this->assertNull( $this->obj->getTalk( NS_SPECIAL ) );
+       public function testIsTalk( $ns, $expected ) {
+               $this->assertSame( !$expected, $this->newObj()->isTalk( $ns ) );
        }
 
-       /**
-        * Regular getAssociated() calls
-        * Namespaces without an associated page (NS_MEDIA, NS_SPECIAL) are tested in
-        * the function testGetAssociatedExceptions()
-        * @covers NamespaceInfo::getAssociated
-        */
-       public function testGetAssociated() {
-               $this->assertEquals( NS_TALK, $this->obj->getAssociated( NS_MAIN ) );
-               $this->assertEquals( NS_MAIN, $this->obj->getAssociated( NS_TALK ) );
+       public function provideIsSubject() {
+               return [
+                       // Special namespaces
+                       [ NS_MEDIA, true ],
+                       [ NS_SPECIAL, true ],
+
+                       // Subject pages
+                       [ NS_MAIN, true ],
+                       [ NS_USER, true ],
+                       [ 100, true ],
+
+                       // Talk pages
+                       [ NS_TALK, false ],
+                       [ NS_USER_TALK, false ],
+                       [ 101, false ],
+               ];
        }
 
-       # ## Exceptions with getAssociated()
-       # ## NS_MEDIA and NS_SPECIAL do not have talk pages. MediaWiki raises
-       # ## an exception for them.
        /**
-        * @expectedException MWException
-        * @covers NamespaceInfo::getAssociated
+        * @covers NamespaceInfo::exists
+        * @dataProvider provideExists
+        * @param int $ns
+        * @param bool $expected
         */
-       public function testGetAssociatedExceptionsForNsMedia() {
-               $this->assertNull( $this->obj->getAssociated( NS_MEDIA ) );
+       public function testExists( $ns, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->exists( $ns ) );
        }
 
-       /**
-        * @expectedException MWException
-        * @covers NamespaceInfo::getAssociated
-        */
-       public function testGetAssociatedExceptionsForNsSpecial() {
-               $this->assertNull( $this->obj->getAssociated( NS_SPECIAL ) );
+       public function provideExists() {
+               return [
+                       'Main' => [ NS_MAIN, true ],
+                       'Talk' => [ NS_TALK, true ],
+                       'Media' => [ NS_MEDIA, true ],
+                       'Special' => [ NS_SPECIAL, true ],
+                       'Nonexistent' => [ 12345, false ],
+                       'Negative nonexistent' => [ -12345, false ],
+               ];
        }
 
        /**
         * Note if we add a namespace registration system with keys like 'MAIN'
-        * we should add tests here for equivilance on things like 'MAIN' == 0
+        * we should add tests here for equivalence on things like 'MAIN' == 0
         * and 'MAIN' == NS_MAIN.
         * @covers NamespaceInfo::equals
         */
        public function testEquals() {
-               $this->assertTrue( $this->obj->equals( NS_MAIN, NS_MAIN ) );
-               $this->assertTrue( $this->obj->equals( NS_MAIN, 0 ) ); // In case we make NS_MAIN 'MAIN'
-               $this->assertTrue( $this->obj->equals( NS_USER, NS_USER ) );
-               $this->assertTrue( $this->obj->equals( NS_USER, 2 ) );
-               $this->assertTrue( $this->obj->equals( NS_USER_TALK, NS_USER_TALK ) );
-               $this->assertTrue( $this->obj->equals( NS_SPECIAL, NS_SPECIAL ) );
-               $this->assertFalse( $this->obj->equals( NS_MAIN, NS_TALK ) );
-               $this->assertFalse( $this->obj->equals( NS_USER, NS_USER_TALK ) );
-               $this->assertFalse( $this->obj->equals( NS_PROJECT, NS_TEMPLATE ) );
+               $obj = $this->newObj();
+               $this->assertTrue( $obj->equals( NS_MAIN, NS_MAIN ) );
+               $this->assertTrue( $obj->equals( NS_MAIN, 0 ) ); // In case we make NS_MAIN 'MAIN'
+               $this->assertTrue( $obj->equals( NS_USER, NS_USER ) );
+               $this->assertTrue( $obj->equals( NS_USER, 2 ) );
+               $this->assertTrue( $obj->equals( NS_USER_TALK, NS_USER_TALK ) );
+               $this->assertTrue( $obj->equals( NS_SPECIAL, NS_SPECIAL ) );
+               $this->assertFalse( $obj->equals( NS_MAIN, NS_TALK ) );
+               $this->assertFalse( $obj->equals( NS_USER, NS_USER_TALK ) );
+               $this->assertFalse( $obj->equals( NS_PROJECT, NS_TEMPLATE ) );
        }
 
        /**
+        * @param int $ns1
+        * @param int $ns2
+        * @param bool $expected
+        * @dataProvider provideSubjectEquals
         * @covers NamespaceInfo::subjectEquals
         */
-       public function testSubjectEquals() {
-               $this->assertSameSubject( NS_MAIN, NS_MAIN );
-               $this->assertSameSubject( NS_MAIN, 0 ); // In case we make NS_MAIN 'MAIN'
-               $this->assertSameSubject( NS_USER, NS_USER );
-               $this->assertSameSubject( NS_USER, 2 );
-               $this->assertSameSubject( NS_USER_TALK, NS_USER_TALK );
-               $this->assertSameSubject( NS_SPECIAL, NS_SPECIAL );
-               $this->assertSameSubject( NS_MAIN, NS_TALK );
-               $this->assertSameSubject( NS_USER, NS_USER_TALK );
+       public function testSubjectEquals( $ns1, $ns2, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->subjectEquals( $ns1, $ns2 ) );
+       }
 
-               $this->assertDifferentSubject( NS_PROJECT, NS_TEMPLATE );
-               $this->assertDifferentSubject( NS_SPECIAL, NS_MAIN );
+       public function provideSubjectEquals() {
+               return [
+                       [ NS_MAIN, NS_MAIN, true ],
+                       // In case we make NS_MAIN 'MAIN'
+                       [ NS_MAIN, 0, true ],
+                       [ NS_USER, NS_USER, true ],
+                       [ NS_USER, 2, true ],
+                       [ NS_USER_TALK, NS_USER_TALK, true ],
+                       [ NS_SPECIAL, NS_SPECIAL, true ],
+                       [ NS_MAIN, NS_TALK, true ],
+                       [ NS_USER, NS_USER_TALK, true ],
+
+                       [ NS_PROJECT, NS_TEMPLATE, false ],
+                       [ NS_SPECIAL, NS_MAIN, false ],
+                       [ NS_MEDIA, NS_SPECIAL, false ],
+                       [ NS_SPECIAL, NS_MEDIA, false ],
+               ];
        }
 
        /**
-        * @covers NamespaceInfo::subjectEquals
+        * @dataProvider provideHasTalkNamespace
+        * @covers NamespaceInfo::hasTalkNamespace
+        *
+        * @param int $ns
+        * @param bool $expected
         */
-       public function testSpecialAndMediaAreDifferentSubjects() {
-               $this->assertDifferentSubject(
-                       NS_MEDIA, NS_SPECIAL,
-                       "NS_MEDIA and NS_SPECIAL are different subject namespaces"
-               );
-               $this->assertDifferentSubject(
-                       NS_SPECIAL, NS_MEDIA,
-                       "NS_SPECIAL and NS_MEDIA are different subject namespaces"
-               );
+       public function testHasTalkNamespace( $ns, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->hasTalkNamespace( $ns ) );
        }
 
        public function provideHasTalkNamespace() {
@@ -235,178 +263,180 @@ class NamespaceInfoTest extends MediaWikiTestCase {
        }
 
        /**
-        * @dataProvider provideHasTalkNamespace
-        * @covers NamespaceInfo::hasTalkNamespace
-        *
-        * @param int $index
+        * @param int $ns
         * @param bool $expected
+        * @param array $contentNamespaces
+        * @covers NamespaceInfo::isContent
+        * @dataProvider provideIsContent
         */
-       public function testHasTalkNamespace( $index, $expected ) {
-               $actual = $this->obj->hasTalkNamespace( $index );
-               $this->assertSame( $actual, $expected, "NS $index" );
-       }
-
-       private function assertIsContent( $ns ) {
-               $this->assertTrue( $this->obj->isContent( $ns ) );
+       public function testIsContent( $ns, $expected, $contentNamespaces = [ NS_MAIN ] ) {
+               $obj = $this->newObj( [ 'ContentNamespaces' => $contentNamespaces ] );
+               $this->assertSame( $expected, $obj->isContent( $ns ) );
        }
 
-       private function assertIsNotContent( $ns ) {
-               $this->assertFalse( $this->obj->isContent( $ns ) );
+       public function provideIsContent() {
+               return [
+                       [ NS_MAIN, true ],
+                       [ NS_MEDIA, false ],
+                       [ NS_SPECIAL, false ],
+                       [ NS_TALK, false ],
+                       [ NS_USER, false ],
+                       [ NS_CATEGORY, false ],
+                       [ 100, false ],
+                       [ 100, true, [ NS_MAIN, 100, 252 ] ],
+                       [ 252, true, [ NS_MAIN, 100, 252 ] ],
+                       [ NS_MAIN, true, [ NS_MAIN, 100, 252 ] ],
+                       // NS_MAIN is always content
+                       [ NS_MAIN, true, [] ],
+               ];
        }
 
        /**
-        * @covers NamespaceInfo::isContent
+        * @dataProvider provideWantSignatures
+        * @covers NamespaceInfo::wantSignatures
+        *
+        * @param int $index
+        * @param bool $expected
         */
-       public function testIsContent() {
-               // NS_MAIN is a content namespace per DefaultSettings.php
-               // and per function definition.
-
-               $this->assertIsContent( NS_MAIN );
-
-               // Other namespaces which are not expected to be content
+       public function testWantSignatures( $index, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->wantSignatures( $index ) );
+       }
 
-               $this->assertIsNotContent( NS_MEDIA );
-               $this->assertIsNotContent( NS_SPECIAL );
-               $this->assertIsNotContent( NS_TALK );
-               $this->assertIsNotContent( NS_USER );
-               $this->assertIsNotContent( NS_CATEGORY );
-               $this->assertIsNotContent( 100 );
+       public function provideWantSignatures() {
+               return [
+                       'Main' => [ NS_MAIN, false ],
+                       'Talk' => [ NS_TALK, true ],
+                       'User' => [ NS_USER, false ],
+                       'User talk' => [ NS_USER_TALK, true ],
+                       'Special' => [ NS_SPECIAL, false ],
+                       'Media' => [ NS_MEDIA, false ],
+                       'Nonexistent talk' => [ 12345, true ],
+                       'Nonexistent subject' => [ 123456, false ],
+                       'Nonexistent negative odd' => [ -12345, false ],
+               ];
        }
 
        /**
-        * Similar to testIsContent() but alters the $wgContentNamespaces
-        * global variable.
-        * @covers NamespaceInfo::isContent
+        * @dataProvider provideWantSignatures_ExtraSignatureNamespaces
+        * @covers NamespaceInfo::wantSignatures
+        *
+        * @param int $index
+        * @param int $expected
         */
-       public function testIsContentAdvanced() {
-               global $wgContentNamespaces;
-
-               // Test that user defined namespace #252 is not content
-               $this->assertIsNotContent( 252 );
-
-               // Bless namespace # 252 as a content namespace
-               $wgContentNamespaces[] = 252;
-
-               $this->assertIsContent( 252 );
-
-               // Makes sure NS_MAIN was not impacted
-               $this->assertIsContent( NS_MAIN );
+       public function testWantSignatures_ExtraSignatureNamespaces( $index, $expected ) {
+               $obj = $this->newObj( [ 'ExtraSignatureNamespaces' =>
+                       [ NS_MAIN, NS_USER, NS_SPECIAL, NS_MEDIA, 123456, -12345 ] ] );
+               $this->assertSame( $expected, $obj->wantSignatures( $index ) );
        }
 
-       private function assertIsWatchable( $ns ) {
-               $this->assertTrue( $this->obj->isWatchable( $ns ) );
-       }
+       public function provideWantSignatures_ExtraSignatureNamespaces() {
+               $ret = array_map(
+                       function ( $arr ) {
+                               // We've added all these as extra signature namespaces, so expect true
+                               return [ $arr[0], true ];
+                       },
+                       self::provideWantSignatures()
+               );
 
-       private function assertIsNotWatchable( $ns ) {
-               $this->assertFalse( $this->obj->isWatchable( $ns ) );
+               // Add one more that's false
+               $ret['Another nonexistent subject'] = [ 12345678, false ];
+               return $ret;
        }
 
        /**
+        * @param int $ns
+        * @param bool $expected
         * @covers NamespaceInfo::isWatchable
+        * @dataProvider provideIsWatchable
         */
-       public function testIsWatchable() {
-               // Specials namespaces are not watchable
-               $this->assertIsNotWatchable( NS_MEDIA );
-               $this->assertIsNotWatchable( NS_SPECIAL );
-
-               // Core defined namespaces are watchables
-               $this->assertIsWatchable( NS_MAIN );
-               $this->assertIsWatchable( NS_TALK );
-
-               // Additional, user defined namespaces are watchables
-               $this->assertIsWatchable( 100 );
-               $this->assertIsWatchable( 101 );
+       public function testIsWatchable( $ns, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->isWatchable( $ns ) );
        }
 
-       private function assertHasSubpages( $ns ) {
-               $this->assertTrue( $this->obj->hasSubpages( $ns ) );
-       }
+       public function provideIsWatchable() {
+               return [
+                       // Specials namespaces are not watchable
+                       [ NS_MEDIA, false ],
+                       [ NS_SPECIAL, false ],
 
-       private function assertHasNotSubpages( $ns ) {
-               $this->assertFalse( $this->obj->hasSubpages( $ns ) );
+                       // Core defined namespaces are watchables
+                       [ NS_MAIN, true ],
+                       [ NS_TALK, true ],
+
+                       // Additional, user defined namespaces are watchables
+                       [ 100, true ],
+                       [ 101, true ],
+               ];
        }
 
        /**
+        * @param int $ns
+        * @param int $expected
+        * @param array|null $namespacesWithSubpages To pass to constructor
         * @covers NamespaceInfo::hasSubpages
+        * @dataProvider provideHasSubpages
         */
-       public function testHasSubpages() {
-               global $wgNamespacesWithSubpages;
-
-               // Special namespaces:
-               $this->assertHasNotSubpages( NS_MEDIA );
-               $this->assertHasNotSubpages( NS_SPECIAL );
-
-               // Namespaces without subpages
-               $this->assertHasNotSubpages( NS_MAIN );
+       public function testHasSubpages( $ns, $expected, array $namespacesWithSubpages = null ) {
+               $obj = $this->newObj( $namespacesWithSubpages
+                       ? [ 'NamespacesWithSubpages' => $namespacesWithSubpages ]
+                       : [] );
+               $this->assertSame( $expected, $obj->hasSubpages( $ns ) );
+       }
 
-               $wgNamespacesWithSubpages[NS_MAIN] = true;
-               $this->assertHasSubpages( NS_MAIN );
+       public function provideHasSubpages() {
+               return [
+                       // Special namespaces:
+                       [ NS_MEDIA, false ],
+                       [ NS_SPECIAL, false ],
 
-               $wgNamespacesWithSubpages[NS_MAIN] = false;
-               $this->assertHasNotSubpages( NS_MAIN );
+                       // Namespaces without subpages
+                       [ NS_MAIN, false ],
+                       [ NS_MAIN, true, [ NS_MAIN => true ] ],
+                       [ NS_MAIN, false, [ NS_MAIN => false ] ],
 
-               // Some namespaces with subpages
-               $this->assertHasSubpages( NS_TALK );
-               $this->assertHasSubpages( NS_USER );
-               $this->assertHasSubpages( NS_USER_TALK );
+                       // Some namespaces with subpages
+                       [ NS_TALK, true ],
+                       [ NS_USER, true ],
+                       [ NS_USER_TALK, true ],
+               ];
        }
 
        /**
+        * @param $contentNamespaces To pass to constructor
+        * @param array $expected
+        * @dataProvider provideGetContentNamespaces
         * @covers NamespaceInfo::getContentNamespaces
         */
-       public function testGetContentNamespaces() {
-               global $wgContentNamespaces;
-
-               $this->assertEquals(
-                       [ NS_MAIN ],
-                       $this->obj->getContentNamespaces(),
-                       '$wgContentNamespaces is an array with only NS_MAIN by default'
-               );
-
-               # test !is_array( $wgcontentNamespaces )
-               $wgContentNamespaces = '';
-               $this->assertEquals( [ NS_MAIN ], $this->obj->getContentNamespaces() );
-
-               $wgContentNamespaces = false;
-               $this->assertEquals( [ NS_MAIN ], $this->obj->getContentNamespaces() );
-
-               $wgContentNamespaces = null;
-               $this->assertEquals( [ NS_MAIN ], $this->obj->getContentNamespaces() );
-
-               $wgContentNamespaces = 5;
-               $this->assertEquals( [ NS_MAIN ], $this->obj->getContentNamespaces() );
+       public function testGetContentNamespaces( $contentNamespaces, array $expected ) {
+               $obj = $this->newObj( [ 'ContentNamespaces' => $contentNamespaces ] );
+               $this->assertSame( $expected, $obj->getContentNamespaces() );
+       }
 
-               # test $wgContentNamespaces === []
-               $wgContentNamespaces = [];
-               $this->assertEquals( [ NS_MAIN ], $this->obj->getContentNamespaces() );
+       public function provideGetContentNamespaces() {
+               return [
+                       // Non-array
+                       [ '', [ NS_MAIN ] ],
+                       [ false, [ NS_MAIN ] ],
+                       [ null, [ NS_MAIN ] ],
+                       [ 5, [ NS_MAIN ] ],
 
-               # test !in_array( NS_MAIN, $wgContentNamespaces )
-               $wgContentNamespaces = [ NS_USER, NS_CATEGORY ];
-               $this->assertEquals(
-                       [ NS_MAIN, NS_USER, NS_CATEGORY ],
-                       $this->obj->getContentNamespaces(),
-                       'NS_MAIN is forced in $wgContentNamespaces even if unwanted'
-               );
+                       // Empty array
+                       [ [], [ NS_MAIN ] ],
 
-               # test other cases, return $wgcontentNamespaces as is
-               $wgContentNamespaces = [ NS_MAIN ];
-               $this->assertEquals(
-                       [ NS_MAIN ],
-                       $this->obj->getContentNamespaces()
-               );
+                       // NS_MAIN is forced to be content even if unwanted
+                       [ [ NS_USER, NS_CATEGORY ], [ NS_MAIN, NS_USER, NS_CATEGORY ] ],
 
-               $wgContentNamespaces = [ NS_MAIN, NS_USER, NS_CATEGORY ];
-               $this->assertEquals(
-                       [ NS_MAIN, NS_USER, NS_CATEGORY ],
-                       $this->obj->getContentNamespaces()
-               );
+                       // In other cases, return as-is
+                       [ [ NS_MAIN ], [ NS_MAIN ] ],
+                       [ [ NS_MAIN, NS_USER, NS_CATEGORY ], [ NS_MAIN, NS_USER, NS_CATEGORY ] ],
+               ];
        }
 
        /**
         * @covers NamespaceInfo::getSubjectNamespaces
         */
        public function testGetSubjectNamespaces() {
-               $subjectsNS = $this->obj->getSubjectNamespaces();
+               $subjectsNS = $this->newObj()->getSubjectNamespaces();
                $this->assertContains( NS_MAIN, $subjectsNS,
                        "Talk namespaces should have NS_MAIN" );
                $this->assertNotContains( NS_TALK, $subjectsNS,
@@ -422,7 +452,7 @@ class NamespaceInfoTest extends MediaWikiTestCase {
         * @covers NamespaceInfo::getTalkNamespaces
         */
        public function testGetTalkNamespaces() {
-               $talkNS = $this->obj->getTalkNamespaces();
+               $talkNS = $this->newObj()->getTalkNamespaces();
                $this->assertContains( NS_TALK, $talkNS,
                        "Subject namespaces should have NS_TALK" );
                $this->assertNotContains( NS_MAIN, $talkNS,
@@ -434,167 +464,871 @@ class NamespaceInfoTest extends MediaWikiTestCase {
                        "Subject namespaces should not have NS_SPECIAL" );
        }
 
-       private function assertIsCapitalized( $ns ) {
-               $this->assertTrue( $this->obj->isCapitalized( $ns ) );
+       /**
+        * @param int $ns
+        * @param bool $expected
+        * @param bool $capitalLinks To pass to constructor
+        * @param array $capitalLinkOverrides To pass to constructor
+        * @dataProvider provideIsCapitalized
+        * @covers NamespaceInfo::isCapitalized
+        */
+       public function testIsCapitalized(
+               $ns, $expected, $capitalLinks = true, array $capitalLinkOverrides = []
+       ) {
+               $obj = $this->newObj( [
+                       'CapitalLinks' => $capitalLinks,
+                       'CapitalLinkOverrides' => $capitalLinkOverrides,
+               ] );
+               $this->assertSame( $expected, $obj->isCapitalized( $ns ) );
        }
 
-       private function assertIsNotCapitalized( $ns ) {
-               $this->assertFalse( $this->obj->isCapitalized( $ns ) );
+       public function provideIsCapitalized() {
+               return [
+                       // Test default settings
+                       [ NS_PROJECT, true ],
+                       [ NS_PROJECT_TALK, true ],
+                       [ NS_MEDIA, true ],
+                       [ NS_FILE, true ],
+
+                       // Always capitalized no matter what
+                       [ NS_SPECIAL, true, false ],
+                       [ NS_USER, true, false ],
+                       [ NS_MEDIAWIKI, true, false ],
+
+                       // Even with an override too
+                       [ NS_SPECIAL, true, false, [ NS_SPECIAL => false ] ],
+                       [ NS_USER, true, false, [ NS_USER => false ] ],
+                       [ NS_MEDIAWIKI, true, false, [ NS_MEDIAWIKI => false ] ],
+
+                       // Overrides work for other namespaces
+                       [ NS_PROJECT, false, true, [ NS_PROJECT => false ] ],
+                       [ NS_PROJECT, true, false, [ NS_PROJECT => true ] ],
+
+                       // NS_MEDIA is treated like NS_FILE, and ignores NS_MEDIA overrides
+                       [ NS_MEDIA, false, true, [ NS_FILE => false, NS_MEDIA => true ] ],
+                       [ NS_MEDIA, true, false, [ NS_FILE => true, NS_MEDIA => false ] ],
+                       [ NS_FILE, false, true, [ NS_FILE => false, NS_MEDIA => true ] ],
+                       [ NS_FILE, true, false, [ NS_FILE => true, NS_MEDIA => false ] ],
+               ];
        }
 
        /**
-        * Some namespaces are always capitalized per code definition
-        * in NamespaceInfo::$alwaysCapitalizedNamespaces
-        * @covers NamespaceInfo::isCapitalized
+        * @covers NamespaceInfo::hasGenderDistinction
         */
-       public function testIsCapitalizedHardcodedAssertions() {
-               // NS_MEDIA and NS_FILE are treated the same
-               $this->assertEquals(
-                       $this->obj->isCapitalized( NS_MEDIA ),
-                       $this->obj->isCapitalized( NS_FILE ),
-                       'NS_MEDIA and NS_FILE have same capitalization rendering'
-               );
+       public function testHasGenderDistinction() {
+               $obj = $this->newObj();
 
-               // Boths are capitalized by default
-               $this->assertIsCapitalized( NS_MEDIA );
-               $this->assertIsCapitalized( NS_FILE );
+               // Namespaces with gender distinctions
+               $this->assertTrue( $obj->hasGenderDistinction( NS_USER ) );
+               $this->assertTrue( $obj->hasGenderDistinction( NS_USER_TALK ) );
+
+               // Other ones, "genderless"
+               $this->assertFalse( $obj->hasGenderDistinction( NS_MEDIA ) );
+               $this->assertFalse( $obj->hasGenderDistinction( NS_SPECIAL ) );
+               $this->assertFalse( $obj->hasGenderDistinction( NS_MAIN ) );
+               $this->assertFalse( $obj->hasGenderDistinction( NS_TALK ) );
+       }
 
-               // Always capitalized namespaces
-               // @see NamespaceInfo::$alwaysCapitalizedNamespaces
-               $this->assertIsCapitalized( NS_SPECIAL );
-               $this->assertIsCapitalized( NS_USER );
-               $this->assertIsCapitalized( NS_MEDIAWIKI );
+       /**
+        * @covers NamespaceInfo::isNonincludable
+        */
+       public function testIsNonincludable() {
+               $obj = $this->newObj( [ 'NonincludableNamespaces' => [ NS_USER ] ] );
+               $this->assertTrue( $obj->isNonincludable( NS_USER ) );
+               $this->assertFalse( $obj->isNonincludable( NS_TEMPLATE ) );
        }
 
        /**
-        * Follows up for testIsCapitalizedHardcodedAssertions() but alter the
-        * global $wgCapitalLink setting to have extended coverage.
+        * @dataProvider provideGetNamespaceContentModel
+        * @covers NamespaceInfo::getNamespaceContentModel
         *
-        * NamespaceInfo::isCapitalized() rely on two global settings:
-        *   $wgCapitalLinkOverrides = []; by default
-        *   $wgCapitalLinks = true; by default
-        * This function test $wgCapitalLinks
+        * @param int $ns
+        * @param string $expected
+        */
+       public function testGetNamespaceContentModel( $ns, $expected ) {
+               $obj = $this->newObj( [ 'NamespaceContentModels' =>
+                       [ NS_USER => CONTENT_MODEL_WIKITEXT, 123 => CONTENT_MODEL_JSON, 1234 => 'abcdef' ],
+               ] );
+               $this->assertSame( $expected, $obj->getNamespaceContentModel( $ns ) );
+       }
+
+       public function provideGetNamespaceContentModel() {
+               return [
+                       [ NS_MAIN, null ],
+                       [ NS_TALK, null ],
+                       [ NS_USER, CONTENT_MODEL_WIKITEXT ],
+                       [ NS_USER_TALK, null ],
+                       [ NS_SPECIAL, null ],
+                       [ 122, null ],
+                       [ 123, CONTENT_MODEL_JSON ],
+                       [ 1234, 'abcdef' ],
+                       [ 1235, null ],
+               ];
+       }
+
+       /**
+        * @dataProvider provideGetCategoryLinkType
+        * @covers NamespaceInfo::getCategoryLinkType
         *
-        * Global setting correctness is tested against the NS_PROJECT and
-        * NS_PROJECT_TALK namespaces since they are not hardcoded nor specials
-        * @covers NamespaceInfo::isCapitalized
+        * @param int $ns
+        * @param string $expected
         */
-       public function testIsCapitalizedWithWgCapitalLinks() {
-               $this->assertIsCapitalized( NS_PROJECT );
-               $this->assertIsCapitalized( NS_PROJECT_TALK );
+       public function testGetCategoryLinkType( $ns, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->getCategoryLinkType( $ns ) );
+       }
 
-               $this->setMwGlobals( 'wgCapitalLinks', false );
+       public function provideGetCategoryLinkType() {
+               return [
+                       [ NS_MAIN, 'page' ],
+                       [ NS_TALK, 'page' ],
+                       [ NS_USER, 'page' ],
+                       [ NS_USER_TALK, 'page' ],
+
+                       [ NS_FILE, 'file' ],
+                       [ NS_FILE_TALK, 'page' ],
 
-               // hardcoded namespaces (see above function) are still capitalized:
-               $this->assertIsCapitalized( NS_SPECIAL );
-               $this->assertIsCapitalized( NS_USER );
-               $this->assertIsCapitalized( NS_MEDIAWIKI );
+                       [ NS_CATEGORY, 'subcat' ],
+                       [ NS_CATEGORY_TALK, 'page' ],
 
-               // setting is correctly applied
-               $this->assertIsNotCapitalized( NS_PROJECT );
-               $this->assertIsNotCapitalized( NS_PROJECT_TALK );
+                       [ 100, 'page' ],
+                       [ 101, 'page' ],
+               ];
        }
 
+       // %} End basic methods
+
+       /**********************************************************************************************
+        * getSubject/Talk/Associated
+        * %{
+        */
+
        /**
-        * Counter part for NamespaceInfo::testIsCapitalizedWithWgCapitalLinks() now
-        * testing the $wgCapitalLinkOverrides global.
+        * @dataProvider provideSubjectTalk
+        * @covers NamespaceInfo::getSubject
+        * @covers NamespaceInfo::getSubjectPage
+        * @covers NamespaceInfo::isMethodValidFor
+        * @covers Title::getSubjectPage
         *
-        * @todo split groups of assertions in autonomous testing functions
-        * @covers NamespaceInfo::isCapitalized
+        * @param int $subject
+        * @param int $talk
         */
-       public function testIsCapitalizedWithWgCapitalLinkOverrides() {
-               global $wgCapitalLinkOverrides;
+       public function testGetSubject( $subject, $talk ) {
+               $obj = $this->newObj();
+               $this->assertSame( $subject, $obj->getSubject( $subject ) );
+               $this->assertSame( $subject, $obj->getSubject( $talk ) );
+
+               $subjectTitleVal = new TitleValue( $subject, 'A' );
+               $talkTitleVal = new TitleValue( $talk, 'A' );
+               // Object will be the same one passed in if it's a subject, different but equal object if
+               // it's talk
+               $this->assertSame( $subjectTitleVal, $obj->getSubjectPage( $subjectTitleVal ) );
+               $this->assertEquals( $subjectTitleVal, $obj->getSubjectPage( $talkTitleVal ) );
+
+               $subjectTitle = Title::makeTitle( $subject, 'A' );
+               $talkTitle = Title::makeTitle( $talk, 'A' );
+               $this->assertSame( $subjectTitle, $subjectTitle->getSubjectPage() );
+               $this->assertEquals( $subjectTitle, $talkTitle->getSubjectPage() );
+       }
 
-               // Test default settings
-               $this->assertIsCapitalized( NS_PROJECT );
-               $this->assertIsCapitalized( NS_PROJECT_TALK );
+       /**
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getSubject
+        * @covers NamespaceInfo::getSubjectPage
+        *
+        * @param int $ns
+        */
+       public function testGetSubject_special( $ns ) {
+               $obj = $this->newObj();
+               $this->assertSame( $ns, $obj->getSubject( $ns ) );
 
-               // hardcoded namespaces (see above function) are capitalized:
-               $this->assertIsCapitalized( NS_SPECIAL );
-               $this->assertIsCapitalized( NS_USER );
-               $this->assertIsCapitalized( NS_MEDIAWIKI );
+               $title = new TitleValue( $ns, 'A' );
+               $this->assertSame( $title, $obj->getSubjectPage( $title ) );
+       }
 
-               // Hardcoded namespaces remains capitalized
-               $wgCapitalLinkOverrides[NS_SPECIAL] = false;
-               $wgCapitalLinkOverrides[NS_USER] = false;
-               $wgCapitalLinkOverrides[NS_MEDIAWIKI] = false;
+       /**
+        * @dataProvider provideSubjectTalk
+        * @covers NamespaceInfo::getTalk
+        * @covers NamespaceInfo::getTalkPage
+        * @covers NamespaceInfo::isMethodValidFor
+        * @covers Title::getTalkPage
+        *
+        * @param int $subject
+        * @param int $talk
+        */
+       public function testGetTalk( $subject, $talk ) {
+               $obj = $this->newObj();
+               $this->assertSame( $talk, $obj->getTalk( $subject ) );
+               $this->assertSame( $talk, $obj->getTalk( $talk ) );
+
+               $subjectTitleVal = new TitleValue( $subject, 'A' );
+               $talkTitleVal = new TitleValue( $talk, 'A' );
+               // Object will be the same one passed in if it's a talk, different but equal object if it's
+               // subject
+               $this->assertEquals( $talkTitleVal, $obj->getTalkPage( $subjectTitleVal ) );
+               $this->assertSame( $talkTitleVal, $obj->getTalkPage( $talkTitleVal ) );
+
+               $subjectTitle = Title::makeTitle( $subject, 'A' );
+               $talkTitle = Title::makeTitle( $talk, 'A' );
+               $this->assertEquals( $talkTitle, $subjectTitle->getTalkPage() );
+               $this->assertSame( $talkTitle, $talkTitle->getTalkPage() );
+       }
 
-               $this->assertIsCapitalized( NS_SPECIAL );
-               $this->assertIsCapitalized( NS_USER );
-               $this->assertIsCapitalized( NS_MEDIAWIKI );
+       /**
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getTalk
+        * @covers NamespaceInfo::isMethodValidFor
+        *
+        * @param int $ns
+        */
+       public function testGetTalk_special( $ns ) {
+               $this->setExpectedException( MWException::class,
+                       "NamespaceInfo::getTalk does not make any sense for given namespace $ns" );
+               $this->newObj()->getTalk( $ns );
+       }
 
-               $wgCapitalLinkOverrides[NS_PROJECT] = false;
-               $this->assertIsNotCapitalized( NS_PROJECT );
+       /**
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getTalk
+        * @covers NamespaceInfo::getTalkPage
+        * @covers NamespaceInfo::isMethodValidFor
+        *
+        * @param int $ns
+        */
+       public function testGetTalkPage_special( $ns ) {
+               $this->setExpectedException( MWException::class,
+                       "NamespaceInfo::getTalk does not make any sense for given namespace $ns" );
+               $this->newObj()->getTalkPage( new TitleValue( $ns, 'A' ) );
+       }
 
-               $wgCapitalLinkOverrides[NS_PROJECT] = true;
-               $this->assertIsCapitalized( NS_PROJECT );
+       /**
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getTalk
+        * @covers NamespaceInfo::getTalkPage
+        * @covers NamespaceInfo::isMethodValidFor
+        * @covers Title::getTalkPage
+        *
+        * @param int $ns
+        */
+       public function testTitleGetTalkPage_special( $ns ) {
+               $this->setExpectedException( MWException::class,
+                       "NamespaceInfo::getTalk does not make any sense for given namespace $ns" );
+               Title::makeTitle( $ns, 'A' )->getTalkPage();
+       }
 
-               unset( $wgCapitalLinkOverrides[NS_PROJECT] );
-               $this->assertIsCapitalized( NS_PROJECT );
+       /**
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getAssociated
+        * @covers NamespaceInfo::isMethodValidFor
+        *
+        * @param int $ns
+        */
+       public function testGetAssociated_special( $ns ) {
+               $this->setExpectedException( MWException::class,
+                       "NamespaceInfo::getAssociated does not make any sense for given namespace $ns" );
+               $this->newObj()->getAssociated( $ns );
        }
 
        /**
-        * @covers NamespaceInfo::hasGenderDistinction
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getAssociated
+        * @covers NamespaceInfo::getAssociatedPage
+        * @covers NamespaceInfo::isMethodValidFor
+        *
+        * @param int $ns
         */
-       public function testHasGenderDistinction() {
-               // Namespaces with gender distinctions
-               $this->assertTrue( $this->obj->hasGenderDistinction( NS_USER ) );
-               $this->assertTrue( $this->obj->hasGenderDistinction( NS_USER_TALK ) );
+       public function testGetAssociatedPage_special( $ns ) {
+               $this->setExpectedException( MWException::class,
+                       "NamespaceInfo::getAssociated does not make any sense for given namespace $ns" );
+               $this->newObj()->getAssociatedPage( new TitleValue( $ns, 'A' ) );
+       }
 
-               // Other ones, "genderless"
-               $this->assertFalse( $this->obj->hasGenderDistinction( NS_MEDIA ) );
-               $this->assertFalse( $this->obj->hasGenderDistinction( NS_SPECIAL ) );
-               $this->assertFalse( $this->obj->hasGenderDistinction( NS_MAIN ) );
-               $this->assertFalse( $this->obj->hasGenderDistinction( NS_TALK ) );
+       /**
+        * @dataProvider provideSpecialNamespaces
+        * @covers NamespaceInfo::getAssociated
+        * @covers NamespaceInfo::getAssociatedPage
+        * @covers NamespaceInfo::isMethodValidFor
+        * @covers Title::getOtherPage
+        *
+        * @param int $ns
+        */
+       public function testTitleGetOtherPage_special( $ns ) {
+               $this->setExpectedException( MWException::class,
+                       "NamespaceInfo::getAssociated does not make any sense for given namespace $ns" );
+               Title::makeTitle( $ns, 'A' )->getOtherPage();
        }
 
        /**
-        * @covers NamespaceInfo::isNonincludable
+        * @dataProvider provideSubjectTalk
+        * @covers NamespaceInfo::getAssociated
+        * @covers NamespaceInfo::getAssociatedPage
+        * @covers Title::getOtherPage
+        *
+        * @param int $subject
+        * @param int $talk
         */
-       public function testIsNonincludable() {
-               global $wgNonincludableNamespaces;
+       public function testGetAssociated( $subject, $talk ) {
+               $obj = $this->newObj();
+               $this->assertSame( $talk, $obj->getAssociated( $subject ) );
+               $this->assertSame( $subject, $obj->getAssociated( $talk ) );
+
+               $subjectTitle = new TitleValue( $subject, 'A' );
+               $talkTitle = new TitleValue( $talk, 'A' );
+               // Object will not be the same
+               $this->assertEquals( $talkTitle, $obj->getAssociatedPage( $subjectTitle ) );
+               $this->assertEquals( $subjectTitle, $obj->getAssociatedPage( $talkTitle ) );
+
+               $subjectTitle = Title::makeTitle( $subject, 'A' );
+               $talkTitle = Title::makeTitle( $talk, 'A' );
+               $this->assertEquals( $talkTitle, $subjectTitle->getOtherPage() );
+               $this->assertEquals( $subjectTitle, $talkTitle->getOtherPage() );
+       }
+
+       public static function provideSubjectTalk() {
+               return [
+                       // Format: [ subject, talk ]
+                       'Main/talk' => [ NS_MAIN, NS_TALK ],
+                       'User/user talk' => [ NS_USER, NS_USER_TALK ],
+                       'Unknown namespaces also supported' => [ 106, 107 ],
+               ];
+       }
+
+       public static function provideSpecialNamespaces() {
+               return [
+                       'Special' => [ NS_SPECIAL ],
+                       'Media' => [ NS_MEDIA ],
+                       'Unknown negative index' => [ -613 ],
+               ];
+       }
 
-               $wgNonincludableNamespaces = [ NS_USER ];
+       // %} End getSubject/Talk/Associated
+
+       /**********************************************************************************************
+        * Canonical namespaces
+        * %{
+        */
 
-               $this->assertTrue( $this->obj->isNonincludable( NS_USER ) );
-               $this->assertFalse( $this->obj->isNonincludable( NS_TEMPLATE ) );
+       // Default canonical namespaces
+       // %{
+       private function getDefaultNamespaces() {
+               return [ NS_MAIN => '' ] + self::$defaultOptions['CanonicalNamespaceNames'];
        }
 
-       private function assertSameSubject( $ns1, $ns2, $msg = '' ) {
-               $this->assertTrue( $this->obj->subjectEquals( $ns1, $ns2 ), $msg );
+       /**
+        * @covers NamespaceInfo::getCanonicalNamespaces
+        */
+       public function testGetCanonicalNamespaces() {
+               $this->assertSame(
+                       $this->getDefaultNamespaces(),
+                       $this->newObj()->getCanonicalNamespaces()
+               );
        }
 
-       private function assertDifferentSubject( $ns1, $ns2, $msg = '' ) {
-               $this->assertFalse( $this->obj->subjectEquals( $ns1, $ns2 ), $msg );
+       /**
+        * @dataProvider provideGetCanonicalName
+        * @covers NamespaceInfo::getCanonicalName
+        *
+        * @param int $index
+        * @param string|bool $expected
+        */
+       public function testGetCanonicalName( $index, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->getCanonicalName( $index ) );
        }
 
-       public function provideGetCategoryLinkType() {
+       public function provideGetCanonicalName() {
                return [
-                       [ NS_MAIN, 'page' ],
-                       [ NS_TALK, 'page' ],
-                       [ NS_USER, 'page' ],
-                       [ NS_USER_TALK, 'page' ],
+                       'Main' => [ NS_MAIN, '' ],
+                       'Talk' => [ NS_TALK, 'Talk' ],
+                       'With underscore not space' => [ NS_USER_TALK, 'User_talk' ],
+                       'Special' => [ NS_SPECIAL, 'Special' ],
+                       'Nonexistent' => [ 12345, false ],
+                       'Nonexistent negative' => [ -12345, false ],
+               ];
+       }
 
-                       [ NS_FILE, 'file' ],
-                       [ NS_FILE_TALK, 'page' ],
+       /**
+        * @dataProvider provideGetCanonicalIndex
+        * @covers NamespaceInfo::getCanonicalIndex
+        *
+        * @param string $name
+        * @param int|null $expected
+        */
+       public function testGetCanonicalIndex( $name, $expected ) {
+               $this->assertSame( $expected, $this->newObj()->getCanonicalIndex( $name ) );
+       }
 
-                       [ NS_CATEGORY, 'subcat' ],
-                       [ NS_CATEGORY_TALK, 'page' ],
+       public function provideGetCanonicalIndex() {
+               return [
+                       'Main' => [ '', NS_MAIN ],
+                       'Talk' => [ 'talk', NS_TALK ],
+                       'Not lowercase' => [ 'Talk', null ],
+                       'With underscore' => [ 'user_talk', NS_USER_TALK ],
+                       'Space is not recognized for underscore' => [ 'user talk', null ],
+                       '0' => [ '0', null ],
+               ];
+       }
 
-                       [ 100, 'page' ],
-                       [ 101, 'page' ],
+       /**
+        * @covers NamespaceInfo::getValidNamespaces
+        */
+       public function testGetValidNamespaces() {
+               $this->assertSame(
+                       [ NS_MAIN, NS_TALK, NS_USER, NS_USER_TALK ],
+                       $this->newObj()->getValidNamespaces()
+               );
+       }
+
+       // %} End default canonical namespaces
+
+       // No canonical namespace names
+       // %{
+
+       /**
+        * @covers NamespaceInfo::getCanonicalNamespaces
+        */
+       public function testGetCanonicalNamespaces_NoCanonicalNamespaceNames() {
+               $obj = $this->newObj( [ 'CanonicalNamespaceNames' => [] ] );
+
+               $this->assertSame( [ NS_MAIN => '' ], $obj->getCanonicalNamespaces() );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalName
+        */
+       public function testGetCanonicalName_NoCanonicalNamespaceNames() {
+               $obj = $this->newObj( [ 'CanonicalNamespaceNames' => [] ] );
+
+               $this->assertSame( '', $obj->getCanonicalName( NS_MAIN ) );
+               $this->assertFalse( $obj->getCanonicalName( NS_TALK ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalIndex
+        */
+       public function testGetCanonicalIndex_NoCanonicalNamespaceNames() {
+               $obj = $this->newObj( [ 'CanonicalNamespaceNames' => [] ] );
+
+               $this->assertSame( NS_MAIN, $obj->getCanonicalIndex( '' ) );
+               $this->assertNull( $obj->getCanonicalIndex( 'talk' ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getValidNamespaces
+        */
+       public function testGetValidNamespaces_NoCanonicalNamespaceNames() {
+               $obj = $this->newObj( [ 'CanonicalNamespaceNames' => [] ] );
+
+               $this->assertSame( [ NS_MAIN ], $obj->getValidNamespaces() );
+       }
+
+       // %} End no canonical namespace names
+
+       // Test extension namespaces
+       // %{
+       private function setupExtensionNamespaces() {
+               $this->scopedCallback = null;
+               $this->scopedCallback = ExtensionRegistry::getInstance()->setAttributeForTest(
+                       'ExtensionNamespaces',
+                       [ NS_MAIN => 'No effect', NS_TALK => 'No effect', 12345 => 'Extended' ]
+               );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalNamespaces
+        */
+       public function testGetCanonicalNamespaces_ExtensionNamespaces() {
+               $this->setupExtensionNamespaces();
+
+               $this->assertSame(
+                       $this->getDefaultNamespaces() + [ 12345 => 'Extended' ],
+                       $this->newObj()->getCanonicalNamespaces()
+               );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalName
+        */
+       public function testGetCanonicalName_ExtensionNamespaces() {
+               $this->setupExtensionNamespaces();
+               $obj = $this->newObj();
+
+               $this->assertSame( '', $obj->getCanonicalName( NS_MAIN ) );
+               $this->assertSame( 'Talk', $obj->getCanonicalName( NS_TALK ) );
+               $this->assertSame( 'Extended', $obj->getCanonicalName( 12345 ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalIndex
+        */
+       public function testGetCanonicalIndex_ExtensionNamespaces() {
+               $this->setupExtensionNamespaces();
+               $obj = $this->newObj();
+
+               $this->assertSame( NS_MAIN, $obj->getCanonicalIndex( '' ) );
+               $this->assertSame( NS_TALK, $obj->getCanonicalIndex( 'talk' ) );
+               $this->assertSame( 12345, $obj->getCanonicalIndex( 'extended' ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getValidNamespaces
+        */
+       public function testGetValidNamespaces_ExtensionNamespaces() {
+               $this->setupExtensionNamespaces();
+
+               $this->assertSame(
+                       [ NS_MAIN, NS_TALK, NS_USER, NS_USER_TALK, 12345 ],
+                       $this->newObj()->getValidNamespaces()
+               );
+       }
+
+       // %} End extension namespaces
+
+       // Hook namespaces
+       // %{
+
+       /**
+        * @return array Expected canonical namespaces
+        */
+       private function setupHookNamespaces() {
+               $callback =
+                       function ( &$canonicalNamespaces ) {
+                               $canonicalNamespaces[NS_MAIN] = 'Main';
+                               unset( $canonicalNamespaces[NS_MEDIA] );
+                               $canonicalNamespaces[123456] = 'Hooked';
+                       };
+               $this->setTemporaryHook( 'CanonicalNamespaces', $callback );
+               $expected = $this->getDefaultNamespaces();
+               ( $callback )( $expected );
+               return $expected;
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalNamespaces
+        */
+       public function testGetCanonicalNamespaces_HookNamespaces() {
+               $expected = $this->setupHookNamespaces();
+
+               $this->assertSame( $expected, $this->newObj()->getCanonicalNamespaces() );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalName
+        */
+       public function testGetCanonicalName_HookNamespaces() {
+               $this->setupHookNamespaces();
+               $obj = $this->newObj();
+
+               $this->assertSame( 'Main', $obj->getCanonicalName( NS_MAIN ) );
+               $this->assertFalse( $obj->getCanonicalName( NS_MEDIA ) );
+               $this->assertSame( 'Hooked', $obj->getCanonicalName( 123456 ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalIndex
+        */
+       public function testGetCanonicalIndex_HookNamespaces() {
+               $this->setupHookNamespaces();
+               $obj = $this->newObj();
+
+               $this->assertSame( NS_MAIN, $obj->getCanonicalIndex( 'main' ) );
+               $this->assertNull( $obj->getCanonicalIndex( 'media' ) );
+               $this->assertSame( 123456, $obj->getCanonicalIndex( 'hooked' ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getValidNamespaces
+        */
+       public function testGetValidNamespaces_HookNamespaces() {
+               $this->setupHookNamespaces();
+
+               $this->assertSame(
+                       [ NS_MAIN, NS_TALK, NS_USER, NS_USER_TALK, 123456 ],
+                       $this->newObj()->getValidNamespaces()
+               );
+       }
+
+       // %} End hook namespaces
+
+       // Extra namespaces
+       // %{
+
+       /**
+        * @return NamespaceInfo
+        */
+       private function setupExtraNamespaces() {
+               return $this->newObj( [ 'ExtraNamespaces' =>
+                       [ NS_MAIN => 'No effect', NS_TALK => 'No effect', 1234567 => 'Extra' ]
+               ] );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalNamespaces
+        */
+       public function testGetCanonicalNamespaces_ExtraNamespaces() {
+               $this->assertSame(
+                       $this->getDefaultNamespaces() + [ 1234567 => 'Extra' ],
+                       $this->setupExtraNamespaces()->getCanonicalNamespaces()
+               );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalName
+        */
+       public function testGetCanonicalName_ExtraNamespaces() {
+               $obj = $this->setupExtraNamespaces();
+
+               $this->assertSame( '', $obj->getCanonicalName( NS_MAIN ) );
+               $this->assertSame( 'Talk', $obj->getCanonicalName( NS_TALK ) );
+               $this->assertSame( 'Extra', $obj->getCanonicalName( 1234567 ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalIndex
+        */
+       public function testGetCanonicalIndex_ExtraNamespaces() {
+               $obj = $this->setupExtraNamespaces();
+
+               $this->assertNull( $obj->getCanonicalIndex( 'no effect' ) );
+               $this->assertNull( $obj->getCanonicalIndex( 'no_effect' ) );
+               $this->assertSame( 1234567, $obj->getCanonicalIndex( 'extra' ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getValidNamespaces
+        */
+       public function testGetValidNamespaces_ExtraNamespaces() {
+               $this->assertSame(
+                       [ NS_MAIN, NS_TALK, NS_USER, NS_USER_TALK, 1234567 ],
+                       $this->setupExtraNamespaces()->getValidNamespaces()
+               );
+       }
+
+       // %} End extra namespaces
+
+       // Canonical namespace caching
+       // %{
+
+       /**
+        * @covers NamespaceInfo::getCanonicalNamespaces
+        */
+       public function testGetCanonicalNamespaces_caching() {
+               $obj = $this->newObj();
+
+               // This should cache the values
+               $obj->getCanonicalNamespaces();
+
+               // Now try to alter them through nefarious means
+               $this->setupExtensionNamespaces();
+               $this->setupHookNamespaces();
+
+               // Should have no effect
+               $this->assertSame( $this->getDefaultNamespaces(), $obj->getCanonicalNamespaces() );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalName
+        */
+       public function testGetCanonicalName_caching() {
+               $obj = $this->newObj();
+
+               // This should cache the values
+               $obj->getCanonicalName( NS_MAIN );
+
+               // Now try to alter them through nefarious means
+               $this->setupExtensionNamespaces();
+               $this->setupHookNamespaces();
+
+               // Should have no effect
+               $this->assertSame( '', $obj->getCanonicalName( NS_MAIN ) );
+               $this->assertSame( 'Media', $obj->getCanonicalName( NS_MEDIA ) );
+               $this->assertFalse( $obj->getCanonicalName( 12345 ) );
+               $this->assertFalse( $obj->getCanonicalName( 123456 ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getCanonicalIndex
+        */
+       public function testGetCanonicalIndex_caching() {
+               $obj = $this->newObj();
+
+               // This should cache the values
+               $obj->getCanonicalIndex( '' );
+
+               // Now try to alter them through nefarious means
+               $this->setupExtensionNamespaces();
+               $this->setupHookNamespaces();
+
+               // Should have no effect
+               $this->assertSame( NS_MAIN, $obj->getCanonicalIndex( '' ) );
+               $this->assertSame( NS_MEDIA, $obj->getCanonicalIndex( 'media' ) );
+               $this->assertNull( $obj->getCanonicalIndex( 'extended' ) );
+               $this->assertNull( $obj->getCanonicalIndex( 'hooked' ) );
+       }
+
+       /**
+        * @covers NamespaceInfo::getValidNamespaces
+        */
+       public function testGetValidNamespaces_caching() {
+               $obj = $this->newObj();
+
+               // This should cache the values
+               $obj->getValidNamespaces();
+
+               // Now try to alter through nefarious means
+               $this->setupExtensionNamespaces();
+               $this->setupHookNamespaces();
+
+               // Should have no effect
+               $this->assertSame(
+                       [ NS_MAIN, NS_TALK, NS_USER, NS_USER_TALK ],
+                       $obj->getValidNamespaces()
+               );
+       }
+
+       // %} End canonical namespace caching
+
+       // Miscellaneous
+       // %{
+
+       /**
+        * @dataProvider provideGetValidNamespaces_misc
+        * @covers NamespaceInfo::getValidNamespaces
+        *
+        * @param array $namespaces List of namespace indices to return from getCanonicalNamespaces()
+        *   (list is overwritten by a hook, so NS_MAIN doesn't have to be present)
+        * @param array $expected
+        */
+       public function testGetValidNamespaces_misc( array $namespaces, array $expected ) {
+               // Each namespace's name is just its index
+               $this->setTemporaryHook( 'CanonicalNamespaces',
+                       function ( &$canonicalNamespaces ) use ( $namespaces ) {
+                               $canonicalNamespaces = array_combine( $namespaces, $namespaces );
+                       }
+               );
+               $this->assertSame( $expected, $this->newObj()->getValidNamespaces() );
+       }
+
+       public function provideGetValidNamespaces_misc() {
+               return [
+                       'Out of order (T109137)' => [ [ 1, 0 ], [ 0, 1 ] ],
+                       'Alphabetical order' => [ [ 10, 2 ], [ 2, 10 ] ],
+                       'Negative' => [ [ -1000, -500, -2, 0 ], [ 0 ] ],
                ];
        }
 
+       // %} End miscellaneous
+       // %} End canonical namespaces
+
+       /**********************************************************************************************
+        * Restriction levels
+        * %{
+        */
+
        /**
-        * @dataProvider provideGetCategoryLinkType
-        * @covers NamespaceInfo::getCategoryLinkType
+        * This mock user can only have isAllowed() called on it.
         *
-        * @param int $index
-        * @param string $expected
+        * @param array $groups Groups for the mock user to have
+        * @return User
         */
-       public function testGetCategoryLinkType( $index, $expected ) {
-               $actual = $this->obj->getCategoryLinkType( $index );
-               $this->assertSame( $expected, $actual, "NS $index" );
+       private function getMockUser( array $groups = [] ) : User {
+               $groups[] = '*';
+
+               $mock = $this->createMock( User::class );
+               $mock->method( 'isAllowed' )->will( $this->returnCallback(
+                       function ( $action ) use ( $groups ) {
+                               global $wgGroupPermissions, $wgRevokePermissions;
+                               if ( $action == '' ) {
+                                       return true;
+                               }
+                               foreach ( $wgRevokePermissions as $group => $rights ) {
+                                       if ( !in_array( $group, $groups ) ) {
+                                               continue;
+                                       }
+                                       if ( isset( $rights[$action] ) && $rights[$action] ) {
+                                               return false;
+                                       }
+                               }
+                               foreach ( $wgGroupPermissions as $group => $rights ) {
+                                       if ( !in_array( $group, $groups ) ) {
+                                               continue;
+                                       }
+                                       if ( isset( $rights[$action] ) && $rights[$action] ) {
+                                               return true;
+                                       }
+                               }
+                               return false;
+                       }
+               ) );
+               $mock->expects( $this->never() )->method( $this->anythingBut( 'isAllowed' ) );
+               return $mock;
        }
+
+       /**
+        * @dataProvider provideGetRestrictionLevels
+        * @covers NamespaceInfo::getRestrictionLevels
+        *
+        * @param array $expected
+        * @param int $ns
+        * @param User|null $user
+        */
+       public function testGetRestrictionLevels( array $expected, $ns, User $user = null ) {
+               $this->setMwGlobals( [
+                       'wgGroupPermissions' => [
+                               '*' => [ 'edit' => true ],
+                               'autoconfirmed' => [ 'editsemiprotected' => true ],
+                               'sysop' => [
+                                       'editsemiprotected' => true,
+                                       'editprotected' => true,
+                               ],
+                               'privileged' => [ 'privileged' => true ],
+                       ],
+                       'wgRevokePermissions' => [
+                               'noeditsemiprotected' => [ 'editsemiprotected' => true ],
+                       ],
+               ] );
+               $obj = $this->newObj( [
+                       'NamespaceProtection' => [
+                               NS_MAIN => 'autoconfirmed',
+                               NS_USER => 'sysop',
+                               101 => [ 'editsemiprotected', 'privileged' ],
+                       ],
+               ] );
+               $this->assertSame( $expected, $obj->getRestrictionLevels( $ns, $user ) );
+       }
+
+       public function provideGetRestrictionLevels() {
+               return [
+                       'No namespace restriction' => [ [ '', 'autoconfirmed', 'sysop' ], NS_TALK ],
+                       'Restricted to autoconfirmed' => [ [ '', 'sysop' ], NS_MAIN ],
+                       'Restricted to sysop' => [ [ '' ], NS_USER ],
+                       'Restricted to someone in two groups' => [ [ '', 'sysop' ], 101 ],
+                       'No special permissions' => [ [ '' ], NS_TALK, $this->getMockUser() ],
+                       'autoconfirmed' => [
+                               [ '', 'autoconfirmed' ],
+                               NS_TALK,
+                               $this->getMockUser( [ 'autoconfirmed' ] )
+                       ],
+                       'autoconfirmed revoked' => [
+                               [ '' ],
+                               NS_TALK,
+                               $this->getMockUser( [ 'autoconfirmed', 'noeditsemiprotected' ] )
+                       ],
+                       'sysop' => [
+                               [ '', 'autoconfirmed', 'sysop' ],
+                               NS_TALK,
+                               $this->getMockUser( [ 'sysop' ] )
+                       ],
+                       'sysop with autoconfirmed revoked (a bit silly)' => [
+                               [ '', 'sysop' ],
+                               NS_TALK,
+                               $this->getMockUser( [ 'sysop', 'noeditsemiprotected' ] )
+                       ],
+               ];
+       }
+
+       // %} End restriction levels
 }
+
+/**
+ * For really cool vim folding this needs to be at the end:
+ * vim: foldmarker=%{,%} foldmethod=marker
+ */