function ColorTest::testHexToRgb

Tests Color::hexToRgb().

File

drupal/core/modules/system/lib/Drupal/system/Tests/Common/ColorTest.php, line 29

Definition of Drupal\system\Tests\Common\ColorTest.

Class

ColorTest

Tests color conversion functions.

Namespace

Code

function testHexToRgb() {

  // Any invalid arguments should throw an exception.
  $values = array(
    '',
    '-1',
    '1',
    '12',
    '12345',
    '1234567',
    '123456789',
    '123456789a',
    'foo',
  );

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

  // Add invalid data types (hex value must be a string).
  $values = array_merge($values, array(
    1,
    12,
    1234,
    12345,
    123456,
    1234567,
    12345678,
    123456789,
    123456789,
    -1,
    PHP_INT_MAX,
    PHP_INT_MAX + 1,
    -PHP_INT_MAX,
    0x0,
    0x10,
  ));
  foreach ($values as $test) {
    $this
      ->assertFalse(Color::validateHex($test), var_export($test, TRUE) . ' is invalid.');
    try {
      Color::hexToRgb($test);
      $this
        ->fail('Color::hexToRgb(' . var_export($test, TRUE) . ') did not throw an exception.');
    } catch (\InvalidArgumentException $e) {
      $this
        ->pass('Color::hexToRgb(' . var_export($test, TRUE) . ') threw an exception.');
    }
  }

  // PHP automatically casts a numeric array key into an integer.
  // Since hex values may consist of 0-9 only, they need to be defined as
  // array values.
  $tests = array(
    // Shorthands without alpha.
    array(
      'hex' => '#000',
      'rgb' => array(
        'red' => 0,
        'green' => 0,
        'blue' => 0,
      ),
    ),
    array(
      'hex' => '#fff',
      'rgb' => array(
        'red' => 255,
        'green' => 255,
        'blue' => 255,
      ),
    ),
    array(
      'hex' => '#abc',
      'rgb' => array(
        'red' => 170,
        'green' => 187,
        'blue' => 204,
      ),
    ),
    array(
      'hex' => 'cba',
      'rgb' => array(
        'red' => 204,
        'green' => 187,
        'blue' => 170,
      ),
    ),
    // Full without alpha.
    array(
      'hex' => '#000000',
      'rgb' => array(
        'red' => 0,
        'green' => 0,
        'blue' => 0,
      ),
    ),
    array(
      'hex' => '#ffffff',
      'rgb' => array(
        'red' => 255,
        'green' => 255,
        'blue' => 255,
      ),
    ),
    array(
      'hex' => '#010203',
      'rgb' => array(
        'red' => 1,
        'green' => 2,
        'blue' => 3,
      ),
    ),
  );
  foreach ($tests as $test) {
    $result = Color::hexToRgb($test['hex']);
    $this
      ->assertIdentical($result, $test['rgb']);
  }
}