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

    public function testDirectInstantiation()
    {
        $snippet = $this->snippetFromClass(Image::class, 'direct');
        $snippet->setLine(4, '$imageResource = fopen(\'php://temp\', \'r\');');
        $res = $snippet->invoke('image');
        $this->assertInstanceOf(Image::class, $res->returnVal());
    }