Google\Cloud\Tests\Snippets\Vision\ImageTest::testFeatureShortcuts PHP Method

    public function testFeatureShortcuts()
    {
        $snippet = $this->snippetFromClass(Image::class, 'shortcut');
        $snippet->setLine(5, '$imageResource = fopen(\'php://temp\', \'r\');');
        $res = $snippet->invoke('image');
        $this->assertInstanceOf(Image::class, $res->returnVal());
    }