Contao\CoreBundle\Test\Contao\GdImageTest::testFromDimension PHP Method

    public function testFromDimension()
    {
        $image = GdImage::fromDimensions(100, 100);
        $this->assertInternalType('resource', $image->getResource());
        $this->assertTrue(imageistruecolor($image->getResource()));
        $this->assertEquals(100, imagesx($image->getResource()));
        $this->assertEquals(100, imagesy($image->getResource()));
        $this->assertEquals(127, imagecolorsforindex($image->getResource(), imagecolorat($image->getResource(), 0, 0))['alpha'], 'Image should be transparent');
        $this->assertEquals(127, imagecolorsforindex($image->getResource(), imagecolorat($image->getResource(), 99, 99))['alpha'], 'Image should be transparent');
    }