public function testInvokeThrowsExceptionWhenTryingToLocateFunction() { $loader = $this->createMock(ClassLoader::class); /** @var ClassLoader $loader */ $locator = new ComposerSourceLocator($loader); $this->assertNull($locator->locateIdentifier($this->getMockReflector(), new Identifier('foo', new IdentifierType(IdentifierType::IDENTIFIER_FUNCTION)))); }