function ImageDimensionsScaleTestCase::testImageDimensionsScale

Tests all control flow branches in image_dimensions_scale().

File

modules/image/tests/image.test, line 1404

Tests for image.module.

Class

ImageDimensionsScaleTestCase

Tests image_dimensions_scale().

Code

function testImageDimensionsScale() {
  // Define input / output datasets to test different branch conditions.
  $test = array();

  // Test branch conditions:
  // - No height.
  // - Upscale, don't need to upscale.
  $tests[] = array(
    'input' => array(
      'dimensions' => array(
        'width' => 1000,
        'height' => 2000,
      ),
      'width' => 200,
      'height' => NULL,
      'upscale' => TRUE,
    ),
    'output' => array(
      'dimensions' => array(
        'width' => 200,
        'height' => 400,
      ),
      'return_value' => TRUE,
    ),
  );

  // Test branch conditions:
  // - No width.
  // - Don't upscale, don't need to upscale.
  $tests[] = array(
    'input' => array(
      'dimensions' => array(
        'width' => 1000,
        'height' => 800,
      ),
      'width' => NULL,
      'height' => 140,
      'upscale' => FALSE,
    ),
    'output' => array(
      'dimensions' => array(
        'width' => 175,
        'height' => 140,
      ),
      'return_value' => TRUE,
    ),
  );

  // Test branch conditions:
  // - Source aspect ratio greater than target.
  // - Upscale, need to upscale.
  $tests[] = array(
    'input' => array(
      'dimensions' => array(
        'width' => 8,
        'height' => 20,
      ),
      'width' => 200,
      'height' => 140,
      'upscale' => TRUE,
    ),
    'output' => array(
      'dimensions' => array(
        'width' => 56,
        'height' => 140,
      ),
      'return_value' => TRUE,
    ),
  );

  // Test branch condition: target aspect ratio greater than source.
  $tests[] = array(
    'input' => array(
      'dimensions' => array(
        'width' => 2000,
        'height' => 800,
      ),
      'width' => 200,
      'height' => 140,
      'upscale' => FALSE,
    ),
    'output' => array(
      'dimensions' => array(
        'width' => 200,
        'height' => 80,
      ),
      'return_value' => TRUE,
    ),
  );

  // Test branch condition: don't upscale, need to upscale.
  $tests[] = array(
    'input' => array(
      'dimensions' => array(
        'width' => 100,
        'height' => 50,
      ),
      'width' => 200,
      'height' => 140,
      'upscale' => FALSE,
    ),
    'output' => array(
      'dimensions' => array(
        'width' => 100,
        'height' => 50,
      ),
      'return_value' => FALSE,
    ),
  );

  foreach ($tests as $test) {
    // Process the test dataset.
    $return_value = image_dimensions_scale($test['input']['dimensions'], $test['input']['width'], $test['input']['height'], $test['input']['upscale']);

    // Check the width.
    $this->assertEqual($test['output']['dimensions']['width'], $test['input']['dimensions']['width'], format_string('Computed width (@computed_width) equals expected width (@expected_width)', array('@computed_width' => $test['output']['dimensions']['width'], '@expected_width' => $test['input']['dimensions']['width'])));

    // Check the height.
    $this->assertEqual($test['output']['dimensions']['height'], $test['input']['dimensions']['height'], format_string('Computed height (@computed_height) equals expected height (@expected_height)', array('@computed_height' => $test['output']['dimensions']['height'], '@expected_height' => $test['input']['dimensions']['height'])));

    // Check the return value.
    $this->assertEqual($test['output']['return_value'], $return_value, 'Correct return value.');
  }
}