mapContaining and setContaining asymmetric matchers

spec/core/asymmetric_equality/SetContainingSpec.js

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+describe('SetContaining', function() {
+  function SetI(iterable) {    // for IE11
+    var set = new Set();
+    iterable.forEach(function(v) {
+      set.add(v);
+    });
+    return set;
+  }
+
+  beforeEach(function() {
+    jasmine.getEnv().requireFunctioningSets();
+  });
+
+
+  it('matches any actual set to an empty set', function() {
+    var actualSet = new SetI(['foo', 'bar']);
+    var containing = new jasmineUnderTest.SetContaining(new Set());
+
+    expect(containing.asymmetricMatch(actualSet)).toBe(true);
+  });
+
+  it('matches when all the values in sample have matches in actual', function() {
+    var actualSet = new SetI([
+      {'foo': 'bar'}, 'baz', [1, 2, 3]
+    ]);
+
+    var containingSet = new SetI([
+      [1, 2, 3], {'foo': 'bar'}
+    ]);
+    var containing = new jasmineUnderTest.SetContaining(containingSet);
+
+    expect(containing.asymmetricMatch(actualSet)).toBe(true);
+  });
+
+  it('does not match when a value is not in actual', function() {
+    var actualSet = new SetI([
+      {'foo': 'bar'}, 'baz', [1, 2, 3]
+    ]);
+
+    var containingSet = new SetI([
+      [1, 2], {'foo': 'bar'}
+    ]);
+    var containing = new jasmineUnderTest.SetContaining(containingSet);
+
+    expect(containing.asymmetricMatch(actualSet)).toBe(false);
+  });
+
+  it('matches when all the values in sample have asymmetric matches in actual', function() {
+    var actualSet = new SetI([
+      [1, 2, 3, 4], 'other', 'foo1'
+    ]);
+
+    var containingSet = new SetI([
+      jasmine.stringMatching(/^foo\d/),
+      jasmine.arrayContaining([2, 3]),
+    ]);
+    var containing = new jasmineUnderTest.SetContaining(containingSet);
+
+    expect(containing.asymmetricMatch(actualSet)).toBe(true);
+  });
+
+  it('does not match when a value in sample has no asymmetric matches in actual', function() {
+    var actualSet = new SetI([
+      'a-foo1', [1, 2, 3, 4], 'other'
+    ]);
+
+    var containingSet = new SetI([
+      jasmine.stringMatching(/^foo\d/),
+      jasmine.arrayContaining([2, 3]),
+    ]);
+    var containing = new jasmineUnderTest.SetContaining(containingSet);
+
+    expect(containing.asymmetricMatch(actualSet)).toBe(false);
+  });
+
+  it('matches recursively', function() {
+    var actualSet = new SetI([
+      'foo', new SetI([1, 'bar', 2]), 'other'
+    ]);
+
+    var containingSet = new SetI([
+      new jasmineUnderTest.SetContaining(new SetI(['bar'])), 'foo'
+    ]);
+    var containing = new jasmineUnderTest.SetContaining(containingSet);
+
+    expect(containing.asymmetricMatch(actualSet)).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 actualSet = new SetI(['foo', -1]);
+    var containing = new jasmineUnderTest.SetContaining(new SetI([-2, 'foo']));
+
+    expect(containing.asymmetricMatch(actualSet, [tester])).toBe(true);
+  });
+
+  it('does not match when actual is not a set', function() {
+    var containingSet = new SetI(['foo']);
+    expect(new jasmineUnderTest.SetContaining(containingSet).asymmetricMatch('foo')).toBe(false);
+    expect(new jasmineUnderTest.SetContaining(containingSet).asymmetricMatch(1)).toBe(false);
+    expect(new jasmineUnderTest.SetContaining(containingSet).asymmetricMatch(['foo'])).toBe(false);
+  });
+
+  it('throws an error when sample is not a set', function() {
+    expect(function() {
+      new jasmineUnderTest.SetContaining({'foo': 'bar'}).asymmetricMatch(new Set());
+    }).toThrowError(/You must provide a set/);
+  });
+
+  it('defines a `jasmineToString` method', function() {
+    var containing = new jasmineUnderTest.SetContaining(new Set());
+
+    expect(containing.jasmineToString()).toMatch(/^<jasmine\.setContaining/);
+  });
+});