public function ContrastTest::testContrastEffect in Image Effects 8.2

Same name and namespace in other branches

1. 8.3 tests/src/Functional/Effect/ContrastTest.php \Drupal\Tests\image_effects\Functional\Effect\ContrastTest::testContrastEffect()
2. 8 tests/src/Functional/Effect/ContrastTest.php \Drupal\Tests\image_effects\Functional\Effect\ContrastTest::testContrastEffect()

Contrast effect test.

@dataProvider providerToolkits

Parameters

string $toolkit_id: The id of the toolkit to set up.

string $toolkit_config: The config object of the toolkit to set up.

array $toolkit_settings: The settings of the toolkit to set up.

File

tests/src/Functional/Effect/ContrastTest.php, line 36

Class

ContrastTest

Contrast effect test.

Namespace

Drupal\Tests\image_effects\Functional\Effect

Code

public function testContrastEffect($toolkit_id, $toolkit_config, array $toolkit_settings) {
  $this
    ->changeToolkit($toolkit_id, $toolkit_config, $toolkit_settings);

  // Test on the PNG test image.
  $original_uri = $this
    ->getTestImageCopyUri('core/tests/fixtures/files/image-test.png');

  // Test data.
  $test_data = [
    // No contrast change.
    '0' => [
      'colors' => [
        $this->red,
        $this->green,
        $this->transparent,
        $this->blue,
      ],
      'tolerance' => 0,
    ],
    // Adjust contrast by -50%.
    // ImageMagick color in test data, GD returns significantly different
    // color.
    '-50' => [
      'colors' => [
        [
          180,
          75,
          75,
          0,
        ],
        [
          75,
          180,
          75,
          0,
        ],
        $this->transparent,
        [
          75,
          75,
          180,
          0,
        ],
      ],
      'tolerance' => 2000,
    ],
    // Adjust contrast by -100%.
    // GD and ImageMagick return slightly different grey.
    '-100' => [
      'colors' => [
        $this->grey,
        $this->grey,
        $this->transparent,
        $this->grey,
      ],
      'tolerance' => 16000,
    ],
    // Adjust contrast by 50%.
    '50' => [
      'colors' => [
        $this->red,
        $this->green,
        $this->transparent,
        $this->blue,
      ],
      'tolerance' => 0,
    ],
    // Adjust contrast by 100%.
    '100' => [
      'colors' => [
        $this->red,
        $this->green,
        $this->transparent,
        $this->blue,
      ],
      'tolerance' => 0,
    ],
  ];
  foreach ($test_data as $key => $entry) {

    // Add contrast effect to the test image style.
    $effect = [
      'id' => 'image_effects_contrast',
      'data' => [
        'level' => $key,
      ],
    ];
    $uuid = $this
      ->addEffectToTestStyle($effect);

    // Check that ::applyEffect generates image with expected contrast.
    $derivative_uri = $this->testImageStyle
      ->buildUri($original_uri);
    $this->testImageStyle
      ->createDerivative($original_uri, $derivative_uri);
    $image = $this->imageFactory
      ->get($derivative_uri, 'gd');
    $this
      ->assertColorsAreClose($entry['colors'][0], $this
      ->getPixelColor($image, 0, 0), $entry['tolerance']);
    $this
      ->assertColorsAreClose($entry['colors'][1], $this
      ->getPixelColor($image, 39, 0), $entry['tolerance']);
    $this
      ->assertColorsAreClose($entry['colors'][2], $this
      ->getPixelColor($image, 0, 19), $entry['tolerance']);
    $this
      ->assertColorsAreClose($entry['colors'][3], $this
      ->getPixelColor($image, 39, 19), $entry['tolerance']);

    // Remove effect.
    $uuid = $this
      ->removeEffectFromTestStyle($uuid);
  }
}