class ColorTest

1. 8.x drupal/core/tests/Drupal/Tests/Core/Utility/ColorTest.php \Drupal\Tests\Core\Utility\ColorTest
2. 8.x drupal/core/modules/color/lib/Drupal/color/Tests/ColorTest.php \Drupal\color\Tests\ColorTest

class ColorTest extends UnitTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Color conversion',
      'description' => 'Tests Color utility class conversions.',
      'group' => 'Common',
    );
  }

  /**
   * Tests Color::hexToRgb().
   *
   * @param string $value
   *   The hex color value.
   * @param string $expected
   *   The expected rgb color value.
   * @param bool $invalid
   *   Whether this value is invalid and exception should be expected.
   *
   * @dataProvider providerTestHexToRgb
   */
  public function testHexToRgb($value, $expected, $invalid = FALSE) {
    if ($invalid) {
      $this
        ->setExpectedException('InvalidArgumentException');
    }
    $this
      ->assertSame($expected, Color::hexToRgb($value));
  }

  /**
   * Data provider for testHexToRgb().
   *
   * @see testHexToRgb()
   *
   * @return array
   *   An array of arrays containing:
   *     - The hex color value.
   *     - The rgb color array value.
   *     - (optional) Boolean indicating invalid status. Defaults to FALSE.
   */
  public function providerTestHexToRgb() {
    $invalid = array();

    // Any invalid arguments should throw an exception.
    foreach (array(
      '',
      '-1',
      '1',
      '12',
      '12345',
      '1234567',
      '123456789',
      '123456789a',
      'foo',
    ) as $value) {
      $invalid[] = array(
        $value,
        '',
        TRUE,
      );
    }

    // Duplicate all invalid value tests with additional '#' prefix.
    // The '#' prefix inherently turns the data type into a string.
    foreach ($invalid as $value) {
      $invalid[] = array(
        '#' . $value[0],
        '',
        TRUE,
      );
    }

    // Add invalid data types (hex value must be a string).
    foreach (array(
      1,
      12,
      1234,
      12345,
      123456,
      1234567,
      12345678,
      123456789,
      123456789,
      -1,
      PHP_INT_MAX,
      PHP_INT_MAX + 1,
      -PHP_INT_MAX,
      0x0,
      0x10,
    ) as $value) {
      $invalid[] = array(
        $value,
        '',
        TRUE,
      );
    }

    // And some valid values.
    $valid = array(
      // Shorthands without alpha.
      array(
        'hex' => '#000',
        'rgb' => array(
          'red' => 0,
          'green' => 0,
          'blue' => 0,
        ),
      ),
      array(
        'hex' => '#fff',
        'rgb' => array(
          'red' => 255,
          'green' => 255,
          'blue' => 255,
        ),
      ),
      array(
        'hex' => '#abc',
        'rgb' => array(
          'red' => 170,
          'green' => 187,
          'blue' => 204,
        ),
      ),
      array(
        'hex' => 'cba',
        'rgb' => array(
          'red' => 204,
          'green' => 187,
          'blue' => 170,
        ),
      ),
      // Full without alpha.
      array(
        'hex' => '#000000',
        'rgb' => array(
          'red' => 0,
          'green' => 0,
          'blue' => 0,
        ),
      ),
      array(
        'hex' => '#ffffff',
        'rgb' => array(
          'red' => 255,
          'green' => 255,
          'blue' => 255,
        ),
      ),
      array(
        'hex' => '#010203',
        'rgb' => array(
          'red' => 1,
          'green' => 2,
          'blue' => 3,
        ),
      ),
    );
    return array_merge($invalid, $valid);
  }

  /**
   * Tests Color::rgbToHex().
   *
   * @param string $value
   *   The rgb color value.
   * @param string $expected
   *   The expected hex color value.
   *
   * @dataProvider providerTestRbgToHex
   */
  public function testRgbToHex($value, $expected) {
    $this
      ->assertSame($expected, Color::rgbToHex($value));
  }

  /**
   * Data provider for testRgbToHex().
   *
   * @see testRgbToHex()
   *
   * @return array
   *   An array of arrays containing:
   *     - The rgb color array value.
   *     - The hex color value.
   */
  public function providerTestRbgToHex() {

    // Input using named RGB array (e.g., as returned by Color::hexToRgb()).
    $tests = array(
      array(
        array(
          'red' => 0,
          'green' => 0,
          'blue' => 0,
        ),
        '#000000',
      ),
      array(
        array(
          'red' => 255,
          'green' => 255,
          'blue' => 255,
        ),
        '#ffffff',
      ),
      array(
        array(
          'red' => 119,
          'green' => 119,
          'blue' => 119,
        ),
        '#777777',
      ),
      array(
        array(
          'red' => 1,
          'green' => 2,
          'blue' => 3,
        ),
        '#010203',
      ),
    );

    // Input using indexed RGB array (e.g.: array(10, 10, 10)).
    foreach ($tests as $test) {
      $tests[] = array(
        array_values($test[0]),
        $test[1],
      );
    }

    // Input using CSS RGB string notation (e.g.: 10, 10, 10).
    foreach ($tests as $test) {
      $tests[] = array(
        implode(', ', $test[0]),
        $test[1],
      );
    }
    return $tests;
  }

}