describe('#toBeRejectedWith', function() { it('should return true if the promise is rejected with the expected value', function() { const matchersUtil = new privateUnderTest.MatchersUtil(), matcher = privateUnderTest.asyncMatchers.toBeRejectedWith(matchersUtil), actual = Promise.reject({ error: 'PEBCAK' }); return matcher.compare(actual, { error: 'PEBCAK' }).then(function(result) { expect(result).toEqual(jasmine.objectContaining({ pass: true })); }); }); it('should fail if the promise resolves', function() { const matchersUtil = new privateUnderTest.MatchersUtil(), matcher = privateUnderTest.asyncMatchers.toBeRejectedWith(matchersUtil), actual = Promise.resolve(); return matcher.compare(actual, '').then(function(result) { expect(result).toEqual(jasmine.objectContaining({ pass: false })); }); }); it('should fail if the promise is rejected with a different value', function() { const matchersUtil = new privateUnderTest.MatchersUtil({ pp: privateUnderTest.makePrettyPrinter() }), matcher = privateUnderTest.asyncMatchers.toBeRejectedWith(matchersUtil), actual = Promise.reject('A Bad Apple'); return matcher.compare(actual, 'Some Cool Thing').then(function(result) { expect(result).toEqual( jasmine.objectContaining({ pass: false, message: "Expected a promise to be rejected with 'Some Cool Thing' but it was rejected with 'A Bad Apple'." }) ); }); }); it('should build its error correctly when negated', function() { const matchersUtil = new privateUnderTest.MatchersUtil({ pp: privateUnderTest.makePrettyPrinter() }), matcher = privateUnderTest.asyncMatchers.toBeRejectedWith(matchersUtil), actual = Promise.reject(true); return matcher.compare(actual, true).then(function(result) { expect(result).toEqual( jasmine.objectContaining({ pass: true, message: 'Expected a promise not to be rejected with true.' }) ); }); }); it('should support custom equality testers', function() { const customEqualityTesters = [ function() { return true; } ], matchersUtil = new privateUnderTest.MatchersUtil({ customTesters: customEqualityTesters }), matcher = privateUnderTest.asyncMatchers.toBeRejectedWith(matchersUtil), actual = Promise.reject('actual'); return matcher.compare(actual, 'expected').then(function(result) { expect(result).toEqual(jasmine.objectContaining({ pass: true })); }); }); it('fails if actual is not a promise', function() { const matchersUtil = new privateUnderTest.MatchersUtil({ pp: privateUnderTest.makePrettyPrinter() }), matcher = privateUnderTest.asyncMatchers.toBeRejectedWith(matchersUtil), actual = 'not a promise'; function f() { return matcher.compare(actual); } expect(f).toThrowError( 'Expected toBeRejectedWith to be called on a promise but was on a string.' ); }); });