Google\Cloud\Tests\Snippets\Vision\AnnotationTest::testImageProperties PHP Method

    public function testImageProperties()
    {
        $snippet = $this->snippetFromMethod(Annotation::class, 'imageProperties');
        $snippet->addLocal('annotation', new Annotation(['imagePropertiesAnnotation' => []]));
        $res = $snippet->invoke('properties');
        $this->assertInstanceOf(ImageProperties::class, $res->returnVal());
    }