describe('MapContaining', function() {
  function MapI(iterable) {    // for IE11
    var map = new Map();
    iterable.forEach(function(kv) {
      map.set(kv[0], kv[1]);
    });
    return map;
  }

  beforeEach(function() {
    jasmine.getEnv().requireFunctioningMaps();
  });


  it('matches any actual map to an empty map', function() {
    var actualMap = new MapI([['foo', 'bar']]);
    var containing = new jasmineUnderTest.MapContaining(new Map());

    expect(containing.asymmetricMatch(actualMap)).toBe(true);
  });

  it('matches when all the key/value pairs in sample have matches in actual', function() {
    var actualMap = new MapI([
      ['foo', [1, 2, 3]],
      [{'foo': 'bar'}, 'baz'],
      ['other', 'any'],
    ]);

    var containingMap = new MapI([
      [{'foo': 'bar'}, 'baz'],
      ['foo', [1, 2, 3]],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(true);
  });

  it('does not match when a key is not in actual', function() {
    var actualMap = new MapI([
      ['foo', [1, 2, 3]],
      [{'foo': 'not a bar'}, 'baz'],
    ]);

    var containingMap = new MapI([
      [{'foo': 'bar'}, 'baz'],
      ['foo', [1, 2, 3]],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(false);
  });

  it('does not match when a value is not in actual', function() {
    var actualMap = new MapI([
      ['foo', [1, 2, 3]],
      [{'foo': 'bar'}, 'baz'],
    ]);

    var containingMap = new MapI([
      [{'foo': 'bar'}, 'baz'],
      ['foo', [1, 2]],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(false);
  });

  it('matches when all the key/value pairs in sample have asymmetric matches in actual', function() {
    var actualMap = new MapI([
      ['foo1', 'not a bar'],
      ['foo2', 'bar'],
      ['baz', [1, 2, 3, 4]],
    ]);

    var containingMap = new MapI([
      [
        jasmine.stringMatching(/^foo\d/),
        'bar'
      ],
      [
        'baz',
        jasmine.arrayContaining([2, 3])
      ],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(true);
  });

  it('does not match when a key in sample has no asymmetric matches in actual', function() {
    var actualMap = new MapI([
      ['a-foo1', 'bar'],
      ['baz', [1, 2, 3, 4]],
    ]);

    var containingMap = new MapI([
      [
        jasmine.stringMatching(/^foo\d/),
        'bar'
      ],
      [
        'baz',
        jasmine.arrayContaining([2, 3])
      ],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(false);
  });

  it('does not match when a value in sample has no asymmetric matches in actual', function() {
    var actualMap = new MapI([
      ['foo1', 'bar'],
      ['baz', [1, 2, 3, 4]],
    ]);

    var containingMap = new MapI([
      [
        jasmine.stringMatching(/^foo\d/),
        'bar'
      ],
      [
        'baz',
        jasmine.arrayContaining([4, 5])
      ],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(false);
  });

  it('matches recursively', function() {
    var actualMap = new MapI([
      ['foo', new MapI([['foo1', 1], ['foo2', 2]])],
      [new MapI([[1, 'bar1'], [2, 'bar2']]), 'bar'],
      ['other', 'any'],
    ]);

    var containingMap = new MapI([
      [
        'foo',
        new jasmineUnderTest.MapContaining(new MapI([['foo1', 1]]))
      ],
      [
        new jasmineUnderTest.MapContaining(new MapI([[2, 'bar2']])),
        'bar'
      ],
    ]);
    var containing = new jasmineUnderTest.MapContaining(containingMap);

    expect(containing.asymmetricMatch(actualMap)).toBe(true);
  });

  it('uses custom equality testers', function() {
    function tester(a, b) {
      // treat all negative numbers as equal
      return (typeof a == 'number' && typeof b == 'number') ? (a < 0 && b < 0) : a === b;
    }
    var actualMap = new MapI([['foo', -1]]);
    var containing = new jasmineUnderTest.MapContaining(new MapI([['foo', -2]]));

    expect(containing.asymmetricMatch(actualMap, [tester])).toBe(true);
  });

  it('does not match when actual is not a map', function() {
    var containingMap = new MapI([['foo', 'bar']]);
    expect(new jasmineUnderTest.MapContaining(containingMap).asymmetricMatch('foo')).toBe(false);
    expect(new jasmineUnderTest.MapContaining(containingMap).asymmetricMatch(-1)).toBe(false);
    expect(new jasmineUnderTest.MapContaining(containingMap).asymmetricMatch({'foo': 'bar'})).toBe(false);
  });

  it('throws an error when sample is not a map', function() {
    expect(function() {
      new jasmineUnderTest.MapContaining({'foo': 'bar'}).asymmetricMatch(new Map());
    }).toThrowError(/You must provide a map/);
  });

  it('defines a `jasmineToString` method', function() {
    var containing = new jasmineUnderTest.MapContaining(new Map());

    expect(containing.jasmineToString()).toMatch(/^<jasmine\.mapContaining/);
  });
});