class FieldFilteredMarkupTest

class FieldFilteredMarkupTest extends UnitTestCase {
  
  /**
   * @covers ::create
   * @dataProvider providerTestCreate
   */
  public function testCreate($string, $expected, $instance_of_check) : void {
    $filtered_string = FieldFilteredMarkup::create($string);
    if ($instance_of_check) {
      $this->assertInstanceOf(FieldFilteredMarkup::class, $filtered_string);
    }
    $this->assertSame($expected, (string) $filtered_string);
  }
  
  /**
   * Provides data for testCreate().
   */
  public static function providerTestCreate() {
    $data = [];
    $data[] = [
      '',
      '',
      FALSE,
    ];
    // Certain tags are filtered.
    $data[] = [
      '<script>test string</script>',
      'test string',
      TRUE,
    ];
    // Certain tags are not filtered.
    $data[] = [
      '<em>test string</em>',
      '<em>test string</em>',
      TRUE,
    ];
    // HTML will be normalized.
    $data[] = [
      '<em>test string',
      '<em>test string</em>',
      TRUE,
    ];
    // Even safe strings will be escaped.
    $safe_string = (new Prophet())->prophesize(MarkupInterface::class);
    $safe_string->__toString()
      ->willReturn('<script>test string</script>');
    $data[] = [
      $safe_string->reveal(),
      'test string',
      TRUE,
    ];
    return $data;
  }
  
  /**
   * @covers ::displayAllowedTags
   */
  public function testDisplayAllowedTags() : void {
    $expected = '<a> <b> <big> <code> <del> <em> <i> <ins> <pre> <q> <small> <span> <strong> <sub> <sup> <tt> <ol> <ul> <li> <p> <br> <img>';
    $this->assertSame($expected, FieldFilteredMarkup::displayAllowedTags());
  }

}