class FormattableMarkupTest

class FormattableMarkupTest extends TestCase {
  use ExpectDeprecationTrait;
  
  /**
   * The error message of the last error in the error handler.
   *
   * @var string
   */
  protected $lastErrorMessage;
  
  /**
   * The error number of the last error in the error handler.
   *
   * @var int
   */
  protected $lastErrorNumber;
  
  /**
   * @covers ::__toString
   * @covers ::jsonSerialize
   */
  public function testToString() : void {
    $string = 'Can I have a @replacement';
    $formattable_string = new FormattableMarkup($string, [
      '@replacement' => 'kitten',
    ]);
    $text = (string) $formattable_string;
    $this->assertEquals('Can I have a kitten', $text);
    $text = $formattable_string->jsonSerialize();
    $this->assertEquals('Can I have a kitten', $text);
  }
  
  /**
   * @covers ::count
   */
  public function testCount() : void {
    $string = 'Can I have a @replacement';
    $formattable_string = new FormattableMarkup($string, [
      '@replacement' => 'kitten',
    ]);
    $this->assertEquals(strlen($string), $formattable_string->count());
  }
  
  /**
   * Custom error handler that saves the last error.
   *
   * We need this custom error handler because we cannot rely on the error to
   * exception conversion as __toString is never allowed to leak any kind of
   * exception.
   *
   * @param int $error_number
   *   The error number.
   * @param string $error_message
   *   The error message.
   */
  public function errorHandler($error_number, $error_message) : void {
    $this->lastErrorNumber = $error_number;
    $this->lastErrorMessage = $error_message;
  }
  
  /**
   * @covers ::__toString
   * @dataProvider providerTestUnexpectedPlaceholder
   */
  public function testUnexpectedPlaceholder($string, $arguments, $error_number, $error_message) : void {
    // We set a custom error handler because of
    // https://github.com/sebastianbergmann/phpunit/issues/487
    set_error_handler([
      $this,
      'errorHandler',
    ]);
    // We want this to trigger an error.
    $markup = new FormattableMarkup($string, $arguments);
    // Cast it to a string which will generate the errors.
    $output = (string) $markup;
    restore_error_handler();
    // The string should not change.
    $this->assertEquals($string, $output);
    $this->assertEquals($error_number, $this->lastErrorNumber);
    $this->assertEquals($error_message, $this->lastErrorMessage);
  }
  
  /**
   * Data provider for FormattableMarkupTest::testUnexpectedPlaceholder().
   *
   * @return array
   *   An array of test cases.
   */
  public static function providerTestUnexpectedPlaceholder() {
    return [
      [
        'Non alpha, non-allowed starting character: ~placeholder',
        [
          '~placeholder' => 'replaced',
        ],
        E_USER_WARNING,
        'Placeholders must begin with one of the following "@", ":" or "%", invalid placeholder (~placeholder) with string: "Non alpha, non-allowed starting character: ~placeholder"',
      ],
      [
        'Alpha starting character: placeholder',
        [
          'placeholder' => 'replaced',
        ],
        NULL,
        '',
      ],
      // Ensure that where the placeholder is located in the string is
      // irrelevant.
[
        'placeholder',
        [
          'placeholder' => 'replaced',
        ],
        NULL,
        '',
      ],
      [
        'No replacements',
        [
          'foo' => 'bar',
        ],
        NULL,
        '',
      ],
    ];
  }

}