text: /**
   * @license
   * Copyright The Closure Library Authors.
   * SPDX-License-Identifier: Apache-2.0
   */
  
  goog.module('goog.labs.testing.stringMatcherTest');
  goog.setTestOnly();
  
  const MatcherError = goog.require('goog.labs.testing.MatcherError');
  const assertThat = goog.require('goog.labs.testing.assertThat');
  /** @suppress {extraRequire} */
  const matchers = goog.require('goog.labs.testing');
  const testSuite = goog.require('goog.testing.testSuite');
  
  function assertMatcherError(callable, errorString) {
    const e = assertThrows(errorString || 'callable throws exception', callable);
    assertTrue(e instanceof MatcherError);
  }
  testSuite({
    testAnyString() {
      assertThat('foo', anyString(), 'typeof "foo" == "string"');
      assertMatcherError(() => {
        assertThat(1, anyString());
      }, 'typeof 1 == "string"');
    },
  
    testContainsString() {
      assertThat('hello', containsString('ell'), 'hello contains ell');
  
      assertMatcherError(() => {
        assertThat('hello', containsString('world!'));
      }, 'containsString should throw exception when it fails');
    },
  
    testEndsWith() {
      assertThat('hello', endsWith('llo'), 'hello ends with llo');
  
      assertMatcherError(() => {
        assertThat('minutes', endsWith('midnight'));
      }, 'endsWith should throw exception when it fails');
    },
  
    testEqualToIgnoringWhitespace() {
      // This function defines an equivalence relation on strings, where strings
      // are equivalent if they have whitespace in the same places, disregarding
      // how much or what kind.  Test the three properties of relations.
      // Test Symmetry.
      assertThat(
          '    h\n   EL L\tO', equalToIgnoringWhitespace('h el l o'),
          '"   h   EL L\tO   " is equal to "h el l o"');
      assertThat(
          'h el l o', equalToIgnoringWhitespace('    h\n   EL L\tO'),
          '"   h   EL L\tO   " is equal with arguments in the other order to "h el l o"');
      // Test Reflexivity
      const x = '\n       Some text and then \nnewlines       \n';
      assertThat(
          x, equalToIgnoringWhitespace(x),
          'Strings including whitespace should compare equal to themselves');
      // Test Transitivity.
      const a = 'S  p  a  c  e';
      const b = ' s\np\na\nc\ne';
      const c = 's P   a    c    e';
      assertThat(a, equalToIgnoringWhitespace(b));
      assertThat(b, equalToIgnoringWhitespace(c));
      assertThat(
          a, equalToIgnoringWhitespace(c),
          'EqualToIgnoringWhitespace should be transitive');
  
      assertMatcherError(() => {
        assertThat('hybrid', equalToIgnoringWhitespace('theory'));
      }, 'equalToIgnoringWhitespace should throw exception when it fails');
    },
  
    testEquals() {
      assertThat('hello', equals('hello'), 'hello equals hello');
  
      assertMatcherError(() => {
        assertThat('thousand', equals('suns'));
      }, 'equals should throw exception when it fails');
    },
  
    testStartsWith() {
      assertThat('hello', startsWith('hel'), 'hello starts with hel');
  
      assertMatcherError(() => {
        assertThat('linkin', startsWith('park'));
      }, 'startsWith should throw exception when it fails');
    },
  
    testStringContainsInOrder() {
      assertThat(
          'hello', stringContainsInOrder(['h', 'el', 'el', 'l', 'o']),
          'hello contains in order: [h, el, l, o]');
  
      assertMatcherError(() => {
        assertThat('hybrid', stringContainsInOrder(['hy', 'brid', 'theory']));
      }, 'stringContainsInOrder should throw exception when it fails');
    },
  
    testMatchesRegex() {
      assertThat('foobar', matchesRegex(/foobar/));
      assertThat('foobar', matchesRegex(/oobar/));
  
      assertMatcherError(() => {
        assertThat('foo', matchesRegex(/^foobar$/));
      }, 'matchesRegex should throw exception when it fails');
    },
  });
  