+ /**
+ * 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.
+ *
+ * @since 1.21
+ */
+ protected function checkPHPExtension( $extName ) {
+ $loaded = extension_loaded( $extName );
+ if ( !$loaded ) {
+ $this->markTestSkipped( "PHP extension '$extName' is not loaded, skipping." );
+ }
+ return $loaded;
+ }
+