function ToolkitGdTest::testResourceDestruction

Tests that GD resources are freed from memory.

@todo Remove the method for PHP 8.0+ https://www.drupal.org/node/3179058

File

core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php, line 467

Class

ToolkitGdTest

Tests for the GD image toolkit.

Namespace

Code

public function testResourceDestruction() {
    if (PHP_VERSION_ID >= 80000) {
        $this->markTestSkipped('In PHP8 resources are no longer used. \\GdImage objects are used instead. These will be garbage collected like the regular objects they are.');
    }
    // Test that an Image object going out of scope releases its GD resource.
    $image = $this->imageFactory
        ->get('core/tests/fixtures/files/image-test.png');
    $res = $image->getToolkit()
        ->getResource();
    $this->assertIsResource($res);
    $image = NULL;
    // @todo In https://www.drupal.org/node/3133236 convert this to
    //   $this->assertIsNotResource($res).
    $this->assertFalse(is_resource($res), 'Image resource was destroyed after losing scope.');
    // Test that 'create_new' operation does not leave orphaned GD resources.
    $image = $this->imageFactory
        ->get('core/tests/fixtures/files/image-test.png');
    $old_res = $image->getToolkit()
        ->getResource();
    // Check if resource has been created successfully.
    $this->assertIsResource($old_res);
    $image->createNew(20, 20);
    $new_res = $image->getToolkit()
        ->getResource();
    // Check if the original resource has been destroyed.
    // @todo In https://www.drupal.org/node/3133236 convert this to
    //   $this->assertIsNotResource($old_res).
    $this->assertFalse(is_resource($old_res));
    // Check if a new resource has been created successfully.
    $this->assertIsResource($new_res);
}