class JsonApiSpecTest

class JsonApiSpecTest extends UnitTestCase {
  
  /**
   * Ensures that member names are properly validated.
   *
   * @dataProvider providerTestIsValidMemberName
   * @covers ::isValidMemberName
   */
  public function testIsValidMemberName($member_name, $expected) : void {
    $this->assertSame($expected, JsonApiSpec::isValidMemberName($member_name));
  }
  
  /**
   * Data provider for testIsValidMemberName.
   */
  public static function providerTestIsValidMemberName() {
    // Copied from http://jsonapi.org/format/upcoming/#document-member-names.
    $data = [];
    $data['alphanumeric-lowercase'] = [
      '12kittens',
      TRUE,
    ];
    $data['alphanumeric-uppercase'] = [
      '12KITTENS',
      TRUE,
    ];
    $data['alphanumeric-mixed'] = [
      '12KiTtEnS',
      TRUE,
    ];
    $data['unicode-above-u+0080'] = [
      '12🐱🐱',
      TRUE,
    ];
    $data['hyphen-start'] = [
      '-kittens',
      FALSE,
    ];
    $data['hyphen-middle'] = [
      'kitt-ens',
      TRUE,
    ];
    $data['hyphen-end'] = [
      'kittens-',
      FALSE,
    ];
    $data['low-line-start'] = [
      '_kittens',
      FALSE,
    ];
    $data['low-line-middle'] = [
      'kitt_ens',
      TRUE,
    ];
    $data['low-line-end'] = [
      'kittens_',
      FALSE,
    ];
    $data['space-start'] = [
      ' kittens',
      FALSE,
    ];
    $data['space-middle'] = [
      'kitt ens',
      TRUE,
    ];
    $data['space-end'] = [
      'kittens ',
      FALSE,
    ];
    // Additional test cases.
    // @todo When D8 requires PHP >= 7, convert to \u{10FFFF}.
    $data['unicode-above-u+0080-highest-allowed'] = [
      "12􏿿",
      TRUE,
    ];
    $data['single-character'] = [
      'a',
      TRUE,
    ];
    $unsafe_chars = [
      '+',
      ',',
      '.',
      '[',
      ']',
      '!',
      '"',
      '#',
      '$',
      '%',
      '&',
      '\'',
      '(',
      ')',
      '*',
      '/',
      ':',
      ';',
      '<',
      '=',
      '>',
      '?',
      '@',
      '\\',
      '^',
      '`',
      '{',
      '|',
      '}',
      '~',
    ];
    foreach ($unsafe_chars as $unsafe_char) {
      $data['unsafe-' . $unsafe_char] = [
        'kitt' . $unsafe_char . 'ens',
        FALSE,
      ];
    }
    // The ASCII control characters are in the range 0x00 to 0x1F plus 0x7F.
    for ($ascii = 0; $ascii <= 0x1f; $ascii++) {
      $data['unsafe-ascii-control-' . $ascii] = [
        'kitt' . chr($ascii) . 'ens',
        FALSE,
      ];
    }
    $data['unsafe-ascii-control-' . 0x7f] = [
      'kitt' . chr(0x7f) . 'ens',
      FALSE,
    ];
    return $data;
  }
  
  /**
   * Provides test cases.
   *
   * @dataProvider providerTestIsValidCustomQueryParameter
   * @covers ::isValidCustomQueryParameter
   * @covers ::isValidMemberName
   */
  public function testIsValidCustomQueryParameter($custom_query_parameter, $expected) : void {
    $this->assertSame($expected, JsonApiSpec::isValidCustomQueryParameter($custom_query_parameter));
  }
  
  /**
   * Data provider for testIsValidCustomQueryParameter.
   */
  public static function providerTestIsValidCustomQueryParameter() {
    $data = static::providerTestIsValidMemberName();
    // All valid member names are also valid custom query parameters, except for
    // single-character ones.
    $data['single-character'][1] = FALSE;
    // Custom query parameter test cases.
    $data['custom-query-parameter-lowercase'] = [
      'foobar',
      FALSE,
    ];
    $data['custom-query-parameter-dash'] = [
      'foo-bar',
      TRUE,
    ];
    $data['custom-query-parameter-underscore'] = [
      'foo_bar',
      TRUE,
    ];
    $data['custom-query-parameter-camel-case'] = [
      'fooBar',
      TRUE,
    ];
    return $data;
  }

}