test: helper to skip tests depending on 'gzip'

Some of our tests explicitly depends on the 'gzip' command line utility,
for example the Dumps test suite.  This patch adds up a simple helper
MediaWikiTestCase::checkHasGzip() which skips tests whenever gzip is
missing.

Change-Id: I5ded9a53d08dcf5f35e666f91e3f64e6e111af32

diff --git a/tests/phpunit/MediaWikiTestCase.php b/tests/phpunit/MediaWikiTestCase.php
index fc51c73..dfc5881 100644 (file)
--- a/tests/phpunit/MediaWikiTestCase.php
+++ b/tests/phpunit/MediaWikiTestCase.php
@@ -862,6 +862,32 @@ abstract class MediaWikiTestCase extends PHPUnit_Framework_TestCase {
                }
        }
 
+       /**
+        * Check whether we have the 'gzip' commandline utility, will skip
+        * the test whenever "gzip -V" fails.
+        *
+        * Result is cached at the process level.
+        *
+        * @return bool
+        *
+        * @since 1.21
+        */
+       protected function checkHasGzip() {
+               static $haveGzip;
+
+               if( $haveGzip === null ) {
+                       $retval = null;
+                       wfShellExec( 'gzip -V', $retval );
+                       $haveGzip = ($retval === 0);
+               }
+
+               if( !$haveGzip ) {
+                       $this->markTestSkipped( "Skip test, requires the gzip utility in PATH" );
+               }
+
+               return $haveGzip;
+       }
+
        /**
         * Check if $extName is a loaded PHP extension, will skip the
         * test whenever it is not loaded.