Neos\Flow\Tests\Unit\Core\ClassLoaderTest::classesFromOverlayedPsr4PackagesAreOverwritten PHP Method

    public function classesFromOverlayedPsr4PackagesAreOverwritten()
    {
        $this->classLoader = new ClassLoader();
        $mockPackage1 = $this->getMockBuilder(Package::class)->disableOriginalConstructor()->getMock();
        $mockPackage1->expects($this->any())->method('getNamespaces')->will($this->returnValue(['TestPackage\\Foo']));
        $mockPackage1->expects($this->any())->method('getFlattenedAutoloadConfiguration')->will($this->returnValue([['namespace' => 'TestPackage\\Foo', 'classPath' => 'vfs://Test/Packages/Libraries/test/subPackage/src/', 'mappingType' => ClassLoader::MAPPING_TYPE_PSR4]]));
        $mockPackage2 = $this->getMockBuilder(Package::class)->disableOriginalConstructor()->getMock();
        $mockPackage2->expects($this->any())->method('getNamespaces')->will($this->returnValue(['TestPackage']));
        $mockPackage2->expects($this->any())->method('getFlattenedAutoloadConfiguration')->will($this->returnValue([['namespace' => 'TestPackage', 'classPath' => 'vfs://Test/Packages/Libraries/test/mainPackage/src/', 'mappingType' => ClassLoader::MAPPING_TYPE_PSR4]]));
        $packages = [$mockPackage2, $mockPackage1];
        mkdir('vfs://Test/Packages/Libraries/test/subPackage/src/', 0770, true);
        mkdir('vfs://Test/Packages/Libraries/test/mainPackage/src/Foo', 0770, true);
        file_put_contents('vfs://Test/Packages/Libraries/test/subPackage/src/Bar3.php', '<?php ' . __CLASS__ . '::$testClassWasOverwritten = TRUE; ?>');
        file_put_contents('vfs://Test/Packages/Libraries/test/mainPackage/src/Foo/Bar3.php', '<?php ' . __CLASS__ . '::$testClassWasOverwritten = FALSE; ?>');
        $this->classLoader->setPackages($packages);
        $this->classLoader->loadClass('TestPackage\\Foo\\Bar3');
        $this->assertTrue(self::$testClassWasOverwritten);
    }