1 files changed, 56 insertions, 0 deletions
diff --git a/tests/phpunit/structure/AutoLoaderTest.php b/tests/phpunit/structure/AutoLoaderTest.php
new file mode 100644
index 00000000..205ea360
--- /dev/null
+++ b/tests/phpunit/structure/AutoLoaderTest.php
@@ -0,0 +1,56 @@
+<?php
+class AutoLoaderTest extends MediaWikiTestCase {
+
+	/**
+	 * Assert that there were no classes loaded that are not registered with the AutoLoader.
+	 *
+	 * For example foo.php having class Foo and class Bar but only registering Foo.
+	 * This is important because we should not be relying on Foo being used before Bar.
+	 */
+	public function testAutoLoadConfig() {
+		$results = self::checkAutoLoadConf();
+
+		$this->assertEquals(
+			$results['expected'],
+			$results['actual']
+		);
+	}
+
+	protected static function checkAutoLoadConf() {
+		global $wgAutoloadLocalClasses, $wgAutoloadClasses, $IP;
+		$supportsParsekit = function_exists( 'parsekit_compile_file' );
+
+		// wgAutoloadLocalClasses has precedence, just like in includes/AutoLoader.php
+		$expected = $wgAutoloadLocalClasses + $wgAutoloadClasses;
+		$actual = array();
+
+		$files = array_unique( $expected );
+
+		foreach ( $files as $file ) {
+			// Only prefix $IP if it doesn't have it already.
+			// Generally local classes don't have it, and those from extensions and test suites do.
+			if ( substr( $file, 0, 1 ) != '/' && substr( $file, 1, 1 ) != ':' ) {
+				$filePath = "$IP/$file";
+			} else {
+				$filePath = $file;
+			}
+			if ( $supportsParsekit ) {
+				$parseInfo = parsekit_compile_file( "$filePath" );
+				$classes = array_keys( $parseInfo['class_table'] );
+			} else {
+				$contents = file_get_contents( "$filePath" );
+				$m = array();
+				preg_match_all( '/\n\s*(?:final)?\s*(?:abstract)?\s*(?:class|interface)\s+([a-zA-Z0-9_]+)/', $contents, $m, PREG_PATTERN_ORDER );
+				$classes = $m[1];
+			}
+			foreach ( $classes as $class ) {
+				$actual[$class] = $file;
+			}
+		}
+
+		return array(
+			'expected' => $expected,
+			'actual' => $actual,
+		);
+	}
+}