How to use asymmetricMatch method in Jest

Best JavaScript code snippet using jest

asymmetricMatchers.test.js

Source:asymmetricMatchers.test.js Github

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...18 stringNotContaining,19 stringMatching,20 stringNotMatching,21} = require('../​asymmetricMatchers');22test('Any.asymmetricMatch()', () => {23 const Thing = function() {};24 [25 any(String).asymmetricMatch('jest'),26 any(Number).asymmetricMatch(1),27 any(Function).asymmetricMatch(() => {}),28 any(Boolean).asymmetricMatch(true),29 any(Object).asymmetricMatch({}),30 any(Array).asymmetricMatch([]),31 any(Thing).asymmetricMatch(new Thing()),32 ].forEach(test => {33 jestExpect(test).toBe(true);34 });35});36test('Any.toAsymmetricMatcher()', () => {37 jestExpect(any(Number).toAsymmetricMatcher()).toBe('Any<Number>');38});39test('Any throws when called with empty constructor', () => {40 jestExpect(() => any()).toThrow();41});42test('Anything matches any type', () => {43 [44 anything().asymmetricMatch('jest'),45 anything().asymmetricMatch(1),46 anything().asymmetricMatch(() => {}),47 anything().asymmetricMatch(true),48 anything().asymmetricMatch({}),49 anything().asymmetricMatch([]),50 ].forEach(test => {51 jestExpect(test).toBe(true);52 });53});54test('Anything does not match null and undefined', () => {55 [56 anything().asymmetricMatch(null),57 anything().asymmetricMatch(undefined),58 ].forEach(test => {59 jestExpect(test).toBe(false);60 });61});62test('Anything.toAsymmetricMatcher()', () => {63 jestExpect(anything().toAsymmetricMatcher()).toBe('Anything');64});65test('ArrayContaining matches', () => {66 [67 arrayContaining([]).asymmetricMatch('jest'),68 arrayContaining(['foo']).asymmetricMatch(['foo']),69 arrayContaining(['foo']).asymmetricMatch(['foo', 'bar']),70 arrayContaining([]).asymmetricMatch({}),71 ].forEach(test => {72 jestExpect(test).toEqual(true);73 });74});75test('ArrayContaining does not match', () => {76 jestExpect(arrayContaining(['foo']).asymmetricMatch(['bar'])).toBe(false);77});78test('ArrayContaining throws for non-arrays', () => {79 jestExpect(() => {80 arrayContaining('foo').asymmetricMatch([]);81 }).toThrow();82});83test('ArrayNotContaining matches', () => {84 jestExpect(arrayNotContaining(['foo']).asymmetricMatch(['bar'])).toBe(true);85});86test('ArrayNotContaining does not match', () => {87 [88 arrayNotContaining([]).asymmetricMatch('jest'),89 arrayNotContaining(['foo']).asymmetricMatch(['foo']),90 arrayNotContaining(['foo']).asymmetricMatch(['foo', 'bar']),91 arrayNotContaining([]).asymmetricMatch({}),92 ].forEach(test => {93 jestExpect(test).toEqual(false);94 });95});96test('ArrayNotContaining throws for non-arrays', () => {97 jestExpect(() => {98 arrayNotContaining('foo').asymmetricMatch([]);99 }).toThrow();100});101test('ObjectContaining matches', () => {102 [103 objectContaining({}).asymmetricMatch('jest'),104 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foo', jest: 'jest'}),105 objectContaining({foo: undefined}).asymmetricMatch({foo: undefined}),106 objectContaining({first: objectContaining({second: {}})}).asymmetricMatch({107 first: {second: {}},108 }),109 ].forEach(test => {110 jestExpect(test).toEqual(true);111 });112});113test('ObjectContaining does not match', () => {114 [115 objectContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),116 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),117 objectContaining({foo: undefined}).asymmetricMatch({}),118 ].forEach(test => {119 jestExpect(test).toEqual(false);120 });121});122test('ObjectContaining matches defined properties', () => {123 const definedPropertyObject = {};124 Object.defineProperty(definedPropertyObject, 'foo', {get: () => 'bar'});125 jestExpect(126 objectContaining({foo: 'bar'}).asymmetricMatch(definedPropertyObject),127 ).toBe(true);128});129test('ObjectContaining matches prototype properties', () => {130 const prototypeObject = {foo: 'bar'};131 let obj;132 if (Object.create) {133 obj = Object.create(prototypeObject);134 } else {135 function Foo() {}136 Foo.prototype = prototypeObject;137 Foo.prototype.constructor = Foo;138 obj = new Foo();139 }140 jestExpect(objectContaining({foo: 'bar'}).asymmetricMatch(obj)).toBe(true);141});142test('ObjectContaining throws for non-objects', () => {143 jestExpect(() => objectContaining(1337).asymmetricMatch()).toThrow();144});145test('ObjectNotContaining matches', () => {146 [147 objectNotContaining({}).asymmetricMatch('jest'),148 objectNotContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),149 objectNotContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),150 objectNotContaining({foo: undefined}).asymmetricMatch({}),151 ].forEach(test => {152 jestExpect(test).toEqual(true);153 });154});155test('ObjectNotContaining does not match', () => {156 [157 objectNotContaining({foo: 'foo'}).asymmetricMatch({158 foo: 'foo',159 jest: 'jest',160 }),161 objectNotContaining({foo: undefined}).asymmetricMatch({foo: undefined}),162 objectNotContaining({163 first: objectNotContaining({second: {}}),164 }).asymmetricMatch({first: {second: {}}}),165 ].forEach(test => {166 jestExpect(test).toEqual(false);167 });168});169test('ObjectNotContaining throws for non-objects', () => {170 jestExpect(() => objectNotContaining(1337).asymmetricMatch()).toThrow();171});172test('StringContaining matches string against string', () => {173 jestExpect(stringContaining('en*').asymmetricMatch('queen*')).toBe(true);174 jestExpect(stringContaining('en').asymmetricMatch('queue')).toBe(false);175});176test('StringContaining throws if expected value is not string', () => {177 jestExpect(() => {178 stringContaining([1]).asymmetricMatch('queen');179 }).toThrow();180});181test('StringContaining returns false if received value is not string', () => {182 jestExpect(stringContaining('en*').asymmetricMatch(1)).toBe(false);183});184test('StringNotContaining matches string against string', () => {185 jestExpect(stringNotContaining('en*').asymmetricMatch('queen*')).toBe(false);186 jestExpect(stringNotContaining('en').asymmetricMatch('queue')).toBe(true);187});188test('StringNotContaining throws if expected value is not string', () => {189 jestExpect(() => {190 stringNotContaining([1]).asymmetricMatch('queen');191 }).toThrow();192});193test('StringNotContaining returns true if received value is not string', () => {194 jestExpect(stringNotContaining('en*').asymmetricMatch(1)).toBe(true);195});196test('StringMatching matches string against regexp', () => {197 jestExpect(stringMatching(/​en/​).asymmetricMatch('queen')).toBe(true);198 jestExpect(stringMatching(/​en/​).asymmetricMatch('queue')).toBe(false);199});200test('StringMatching matches string against string', () => {201 jestExpect(stringMatching('en').asymmetricMatch('queen')).toBe(true);202 jestExpect(stringMatching('en').asymmetricMatch('queue')).toBe(false);203});204test('StringMatching throws if expected value is neither string nor regexp', () => {205 jestExpect(() => {206 stringMatching([1]).asymmetricMatch('queen');207 }).toThrow();208});209test('StringMatching returns false if received value is not string', () => {210 jestExpect(stringMatching('en').asymmetricMatch(1)).toBe(false);211});212test('StringMatching returns false even if coerced non-string received value matches pattern', () => {213 jestExpect(stringMatching('null').asymmetricMatch(null)).toBe(false);214});215test('StringNotMatching matches string against regexp', () => {216 jestExpect(stringNotMatching(/​en/​).asymmetricMatch('queen')).toBe(false);217 jestExpect(stringNotMatching(/​en/​).asymmetricMatch('queue')).toBe(true);218});219test('StringNotMatching matches string against string', () => {220 jestExpect(stringNotMatching('en').asymmetricMatch('queen')).toBe(false);221 jestExpect(stringNotMatching('en').asymmetricMatch('queue')).toBe(true);222});223test('StringNotMatching throws if expected value is neither string nor regexp', () => {224 jestExpect(() => {225 stringNotMatching([1]).asymmetricMatch('queen');226 }).toThrow();227});228test('StringNotMatching returns true if received value is not string', () => {229 jestExpect(stringNotMatching('en').asymmetricMatch(1)).toBe(true);...

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asymmetric_matchers.test.js

Source:asymmetric_matchers.test.js Github

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...18 stringNotContaining,19 stringMatching,20 stringNotMatching,21} = require('../​asymmetric_matchers');22test('Any.asymmetricMatch()', () => {23 const Thing = function() {};24 [25 any(String).asymmetricMatch('jest'),26 any(Number).asymmetricMatch(1),27 any(Function).asymmetricMatch(() => {}),28 any(Boolean).asymmetricMatch(true),29 any(Object).asymmetricMatch({}),30 any(Array).asymmetricMatch([]),31 any(Thing).asymmetricMatch(new Thing()),32 ].forEach(test => {33 jestExpect(test).toBe(true);34 });35});36test('Any.toAsymmetricMatcher()', () => {37 jestExpect(any(Number).toAsymmetricMatcher()).toBe('Any<Number>');38});39test('Any throws when called with empty constructor', () => {40 jestExpect(() => any()).toThrow();41});42test('Anything matches any type', () => {43 [44 anything().asymmetricMatch('jest'),45 anything().asymmetricMatch(1),46 anything().asymmetricMatch(() => {}),47 anything().asymmetricMatch(true),48 anything().asymmetricMatch({}),49 anything().asymmetricMatch([]),50 ].forEach(test => {51 jestExpect(test).toBe(true);52 });53});54test('Anything does not match null and undefined', () => {55 [56 anything().asymmetricMatch(null),57 anything().asymmetricMatch(undefined),58 ].forEach(test => {59 jestExpect(test).toBe(false);60 });61});62test('Anything.toAsymmetricMatcher()', () => {63 jestExpect(anything().toAsymmetricMatcher()).toBe('Anything');64});65test('ArrayContaining matches', () => {66 [67 arrayContaining([]).asymmetricMatch('jest'),68 arrayContaining(['foo']).asymmetricMatch(['foo']),69 arrayContaining(['foo']).asymmetricMatch(['foo', 'bar']),70 arrayContaining([]).asymmetricMatch({}),71 ].forEach(test => {72 jestExpect(test).toEqual(true);73 });74});75test('ArrayContaining does not match', () => {76 jestExpect(arrayContaining(['foo']).asymmetricMatch(['bar'])).toBe(false);77});78test('ArrayContaining throws for non-arrays', () => {79 jestExpect(() => {80 arrayContaining('foo').asymmetricMatch([]);81 }).toThrow();82});83test('ArrayNotContaining matches', () => {84 jestExpect(arrayNotContaining(['foo']).asymmetricMatch(['bar'])).toBe(true);85});86test('ArrayNotContaining does not match', () => {87 [88 arrayNotContaining([]).asymmetricMatch('jest'),89 arrayNotContaining(['foo']).asymmetricMatch(['foo']),90 arrayNotContaining(['foo']).asymmetricMatch(['foo', 'bar']),91 arrayNotContaining([]).asymmetricMatch({}),92 ].forEach(test => {93 jestExpect(test).toEqual(false);94 });95});96test('ArrayNotContaining throws for non-arrays', () => {97 jestExpect(() => {98 arrayNotContaining('foo').asymmetricMatch([]);99 }).toThrow();100});101test('ObjectContaining matches', () => {102 [103 objectContaining({}).asymmetricMatch('jest'),104 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foo', jest: 'jest'}),105 objectContaining({foo: undefined}).asymmetricMatch({foo: undefined}),106 objectContaining({first: objectContaining({second: {}})}).asymmetricMatch({107 first: {second: {}},108 }),109 ].forEach(test => {110 jestExpect(test).toEqual(true);111 });112});113test('ObjectContaining does not match', () => {114 [115 objectContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),116 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),117 objectContaining({foo: undefined}).asymmetricMatch({}),118 ].forEach(test => {119 jestExpect(test).toEqual(false);120 });121});122test('ObjectContaining matches defined properties', () => {123 const definedPropertyObject = {};124 Object.defineProperty(definedPropertyObject, 'foo', {get: () => 'bar'});125 jestExpect(126 objectContaining({foo: 'bar'}).asymmetricMatch(definedPropertyObject),127 ).toBe(true);128});129test('ObjectContaining matches prototype properties', () => {130 const prototypeObject = {foo: 'bar'};131 let obj;132 if (Object.create) {133 obj = Object.create(prototypeObject);134 } else {135 function Foo() {}136 Foo.prototype = prototypeObject;137 Foo.prototype.constructor = Foo;138 obj = new Foo();139 }140 jestExpect(objectContaining({foo: 'bar'}).asymmetricMatch(obj)).toBe(true);141});142test('ObjectContaining throws for non-objects', () => {143 jestExpect(() => objectContaining(1337).asymmetricMatch()).toThrow();144});145test('ObjectNotContaining matches', () => {146 [147 objectNotContaining({}).asymmetricMatch('jest'),148 objectNotContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),149 objectNotContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),150 objectNotContaining({foo: undefined}).asymmetricMatch({}),151 ].forEach(test => {152 jestExpect(test).toEqual(true);153 });154});155test('ObjectNotContaining does not match', () => {156 [157 objectNotContaining({foo: 'foo'}).asymmetricMatch({158 foo: 'foo',159 jest: 'jest',160 }),161 objectNotContaining({foo: undefined}).asymmetricMatch({foo: undefined}),162 objectNotContaining({163 first: objectNotContaining({second: {}}),164 }).asymmetricMatch({first: {second: {}}}),165 ].forEach(test => {166 jestExpect(test).toEqual(false);167 });168});169test('ObjectNotContaining throws for non-objects', () => {170 jestExpect(() => objectNotContaining(1337).asymmetricMatch()).toThrow();171});172test('StringContaining matches string against string', () => {173 jestExpect(stringContaining('en*').asymmetricMatch('queen*')).toBe(true);174 jestExpect(stringContaining('en').asymmetricMatch('queue')).toBe(false);175});176test('StringContaining throws for non-strings', () => {177 jestExpect(() => {178 stringContaining([1]).asymmetricMatch('queen');179 }).toThrow();180 jestExpect(() => {181 stringContaining('en*').asymmetricMatch(1);182 }).toThrow();183});184test('StringNotContaining matches string against string', () => {185 jestExpect(stringNotContaining('en*').asymmetricMatch('queen*')).toBe(false);186 jestExpect(stringNotContaining('en').asymmetricMatch('queue')).toBe(true);187});188test('StringNotContaining throws for non-strings', () => {189 jestExpect(() => {190 stringNotContaining([1]).asymmetricMatch('queen');191 }).toThrow();192 jestExpect(() => {193 stringNotContaining('en*').asymmetricMatch(1);194 }).toThrow();195});196test('StringMatching matches string against regexp', () => {197 jestExpect(stringMatching(/​en/​).asymmetricMatch('queen')).toBe(true);198 jestExpect(stringMatching(/​en/​).asymmetricMatch('queue')).toBe(false);199});200test('StringMatching matches string against string', () => {201 jestExpect(stringMatching('en').asymmetricMatch('queen')).toBe(true);202 jestExpect(stringMatching('en').asymmetricMatch('queue')).toBe(false);203});204test('StringMatching throws for non-strings and non-regexps', () => {205 jestExpect(() => {206 stringMatching([1]).asymmetricMatch('queen');207 }).toThrow();208});209test('StringMatching throws for non-string actual values', () => {210 jestExpect(() => {211 stringMatching('en').asymmetricMatch(1);212 }).toThrow();213});214test('StringNotMatching matches string against regexp', () => {215 jestExpect(stringNotMatching(/​en/​).asymmetricMatch('queen')).toBe(false);216 jestExpect(stringNotMatching(/​en/​).asymmetricMatch('queue')).toBe(true);217});218test('StringNotMatching matches string against string', () => {219 jestExpect(stringNotMatching('en').asymmetricMatch('queen')).toBe(false);220 jestExpect(stringNotMatching('en').asymmetricMatch('queue')).toBe(true);221});222test('StringNotMatching throws for non-strings and non-regexps', () => {223 jestExpect(() => {224 stringNotMatching([1]).asymmetricMatch('queen');225 }).toThrow();226});227test('StringNotMatching throws for non-string actual values', () => {228 jestExpect(() => {229 stringNotMatching('en').asymmetricMatch(1);230 }).toThrow();...

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28asymmetricMatchers.test.js

Source:28asymmetricMatchers.test.js Github

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...18 stringNotContaining,19 stringMatching,20 stringNotMatching,21} = require('../​asymmetricMatchers');22test('Any.asymmetricMatch()', () => {23 const Thing = function() {};24 [25 any(String).asymmetricMatch('jest'),26 any(Number).asymmetricMatch(1),27 any(Function).asymmetricMatch(() => {}),28 any(Boolean).asymmetricMatch(true),29 any(Object).asymmetricMatch({}),30 any(Array).asymmetricMatch([]),31 any(Thing).asymmetricMatch(new Thing()),32 ].forEach(test => {33 jestExpect(test).toBe(true);34 });35});36test('Any.toAsymmetricMatcher()', () => {37 jestExpect(any(Number).toAsymmetricMatcher()).toBe('Any<Number>');38});39test('Any throws when called with empty constructor', () => {40 jestExpect(() => any()).toThrow();41});42test('Anything matches any type', () => {43 [44 anything().asymmetricMatch('jest'),45 anything().asymmetricMatch(1),46 anything().asymmetricMatch(() => {}),47 anything().asymmetricMatch(true),48 anything().asymmetricMatch({}),49 anything().asymmetricMatch([]),50 ].forEach(test => {51 jestExpect(test).toBe(true);52 });53});54test('Anything does not match null and undefined', () => {55 [56 anything().asymmetricMatch(null),57 anything().asymmetricMatch(undefined),58 ].forEach(test => {59 jestExpect(test).toBe(false);60 });61});62test('Anything.toAsymmetricMatcher()', () => {63 jestExpect(anything().toAsymmetricMatcher()).toBe('Anything');64});65test('ArrayContaining matches', () => {66 [67 arrayContaining([]).asymmetricMatch('jest'),68 arrayContaining(['foo']).asymmetricMatch(['foo']),69 arrayContaining(['foo']).asymmetricMatch(['foo', 'bar']),70 arrayContaining([]).asymmetricMatch({}),71 ].forEach(test => {72 jestExpect(test).toEqual(true);73 });74});75test('ArrayContaining does not match', () => {76 jestExpect(arrayContaining(['foo']).asymmetricMatch(['bar'])).toBe(false);77});78test('ArrayContaining throws for non-arrays', () => {79 jestExpect(() => {80 arrayContaining('foo').asymmetricMatch([]);81 }).toThrow();82});83test('ArrayNotContaining matches', () => {84 jestExpect(arrayNotContaining(['foo']).asymmetricMatch(['bar'])).toBe(true);85});86test('ArrayNotContaining does not match', () => {87 [88 arrayNotContaining([]).asymmetricMatch('jest'),89 arrayNotContaining(['foo']).asymmetricMatch(['foo']),90 arrayNotContaining(['foo']).asymmetricMatch(['foo', 'bar']),91 arrayNotContaining([]).asymmetricMatch({}),92 ].forEach(test => {93 jestExpect(test).toEqual(false);94 });95});96test('ArrayNotContaining throws for non-arrays', () => {97 jestExpect(() => {98 arrayNotContaining('foo').asymmetricMatch([]);99 }).toThrow();100});101test('ObjectContaining matches', () => {102 [103 objectContaining({}).asymmetricMatch('jest'),104 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foo', jest: 'jest'}),105 objectContaining({foo: undefined}).asymmetricMatch({foo: undefined}),106 objectContaining({first: objectContaining({second: {}})}).asymmetricMatch({107 first: {second: {}},108 }),109 ].forEach(test => {110 jestExpect(test).toEqual(true);111 });112});113test('ObjectContaining does not match', () => {114 [115 objectContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),116 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),117 objectContaining({foo: undefined}).asymmetricMatch({}),118 ].forEach(test => {119 jestExpect(test).toEqual(false);120 });121});122test('ObjectContaining matches defined properties', () => {123 const definedPropertyObject = {};124 Object.defineProperty(definedPropertyObject, 'foo', {get: () => 'bar'});125 jestExpect(126 objectContaining({foo: 'bar'}).asymmetricMatch(definedPropertyObject),127 ).toBe(true);128});129test('ObjectContaining matches prototype properties', () => {130 const prototypeObject = {foo: 'bar'};131 let obj;132 if (Object.create) {133 obj = Object.create(prototypeObject);134 } else {135 function Foo() {}136 Foo.prototype = prototypeObject;137 Foo.prototype.constructor = Foo;138 obj = new Foo();139 }140 jestExpect(objectContaining({foo: 'bar'}).asymmetricMatch(obj)).toBe(true);141});142test('ObjectContaining throws for non-objects', () => {143 jestExpect(() => objectContaining(1337).asymmetricMatch()).toThrow();144});145test('ObjectNotContaining matches', () => {146 [147 objectNotContaining({}).asymmetricMatch('jest'),148 objectNotContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),149 objectNotContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),150 objectNotContaining({foo: undefined}).asymmetricMatch({}),151 ].forEach(test => {152 jestExpect(test).toEqual(true);153 });154});155test('ObjectNotContaining does not match', () => {156 [157 objectNotContaining({foo: 'foo'}).asymmetricMatch({158 foo: 'foo',159 jest: 'jest',160 }),161 objectNotContaining({foo: undefined}).asymmetricMatch({foo: undefined}),162 objectNotContaining({163 first: objectNotContaining({second: {}}),164 }).asymmetricMatch({first: {second: {}}}),165 ].forEach(test => {166 jestExpect(test).toEqual(false);167 });168});169test('ObjectNotContaining throws for non-objects', () => {170 jestExpect(() => objectNotContaining(1337).asymmetricMatch()).toThrow();171});172test('StringContaining matches string against string', () => {173 jestExpect(stringContaining('en*').asymmetricMatch('queen*')).toBe(true);174 jestExpect(stringContaining('en').asymmetricMatch('queue')).toBe(false);175});176test('StringContaining throws for non-strings', () => {177 jestExpect(() => {178 stringContaining([1]).asymmetricMatch('queen');179 }).toThrow();180 jestExpect(() => {181 stringContaining('en*').asymmetricMatch(1);182 }).toThrow();183});184test('StringNotContaining matches string against string', () => {185 jestExpect(stringNotContaining('en*').asymmetricMatch('queen*')).toBe(false);186 jestExpect(stringNotContaining('en').asymmetricMatch('queue')).toBe(true);187});188test('StringNotContaining throws for non-strings', () => {189 jestExpect(() => {190 stringNotContaining([1]).asymmetricMatch('queen');191 }).toThrow();192 jestExpect(() => {193 stringNotContaining('en*').asymmetricMatch(1);194 }).toThrow();195});196test('StringMatching matches string against regexp', () => {197 jestExpect(stringMatching(/​en/​).asymmetricMatch('queen')).toBe(true);198 jestExpect(stringMatching(/​en/​).asymmetricMatch('queue')).toBe(false);199});200test('StringMatching matches string against string', () => {201 jestExpect(stringMatching('en').asymmetricMatch('queen')).toBe(true);202 jestExpect(stringMatching('en').asymmetricMatch('queue')).toBe(false);203});204test('StringMatching throws for non-strings and non-regexps', () => {205 jestExpect(() => {206 stringMatching([1]).asymmetricMatch('queen');207 }).toThrow();208});209test('StringMatching throws for non-string actual values', () => {210 jestExpect(() => {211 stringMatching('en').asymmetricMatch(1);212 }).toThrow();213});214test('StringNotMatching matches string against regexp', () => {215 jestExpect(stringNotMatching(/​en/​).asymmetricMatch('queen')).toBe(false);216 jestExpect(stringNotMatching(/​en/​).asymmetricMatch('queue')).toBe(true);217});218test('StringNotMatching matches string against string', () => {219 jestExpect(stringNotMatching('en').asymmetricMatch('queen')).toBe(false);220 jestExpect(stringNotMatching('en').asymmetricMatch('queue')).toBe(true);221});222test('StringNotMatching throws for non-strings and non-regexps', () => {223 jestExpect(() => {224 stringNotMatching([1]).asymmetricMatch('queen');225 }).toThrow();226});227test('StringNotMatching throws for non-string actual values', () => {228 jestExpect(() => {229 stringNotMatching('en').asymmetricMatch(1);230 }).toThrow();...

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asymmetric-matchers-test.js

Source:asymmetric-matchers-test.js Github

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...17 objectContaining,18 stringContaining,19 stringMatching,20} = require('../​asymmetric-matchers');21test('Any.asymmetricMatch()', () => {22 const Thing = function() {};23 [24 any(String).asymmetricMatch('jest'),25 any(Number).asymmetricMatch(1),26 any(Function).asymmetricMatch(() => {}),27 any(Boolean).asymmetricMatch(true),28 any(Object).asymmetricMatch({}),29 any(Array).asymmetricMatch([]),30 any(Thing).asymmetricMatch(new Thing()),31 ].forEach(test => {32 jestExpect(test).toBe(true);33 });34});35test('Any.toAsymmetricMatcher()', () => {36 jestExpect(any(Number).toAsymmetricMatcher()).toBe('Any<Number>');37});38test('Any throws when called with empty constructor', () => {39 jestExpect(() => any()).toThrow();40});41test('Anything matches any type', () => {42 [43 anything().asymmetricMatch('jest'),44 anything().asymmetricMatch(1),45 anything().asymmetricMatch(() => {}),46 anything().asymmetricMatch(true),47 anything().asymmetricMatch({}),48 anything().asymmetricMatch([]),49 ].forEach(test => {50 jestExpect(test).toBe(true);51 });52});53test('Anything does not match null and undefined', () => {54 [55 anything().asymmetricMatch(null),56 anything().asymmetricMatch(undefined),57 ].forEach(test => {58 jestExpect(test).toBe(false);59 });60});61test('Anything.toAsymmetricMatcher()', () => {62 jestExpect(anything().toAsymmetricMatcher()).toBe('Anything');63});64test('ArrayContaining matches', () => {65 [66 arrayContaining([]).asymmetricMatch('jest'),67 arrayContaining(['foo']).asymmetricMatch(['foo']),68 arrayContaining(['foo']).asymmetricMatch(['foo', 'bar']),69 arrayContaining([]).asymmetricMatch({}),70 ].forEach(test => {71 jestExpect(test).toEqual(true);72 });73});74test('ArrayContaining does not match', () => {75 jestExpect(arrayContaining(['foo']).asymmetricMatch(['bar'])).toBe(false);76});77test('ArrayContaining throws for non-arrays', () => {78 jestExpect(() => {79 arrayContaining('foo').asymmetricMatch([]);80 }).toThrow();81});82test('ObjectContaining matches', () => {83 [84 objectContaining({}).asymmetricMatch('jest'),85 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foo', jest: 'jest'}),86 objectContaining({foo: undefined}).asymmetricMatch({foo: undefined}),87 objectContaining({first: objectContaining({second: {}})}).asymmetricMatch({88 first: {second: {}},89 }),90 ].forEach(test => {91 jestExpect(test).toEqual(true);92 });93});94test('ObjectContaining does not match', () => {95 [96 objectContaining({foo: 'foo'}).asymmetricMatch({bar: 'bar'}),97 objectContaining({foo: 'foo'}).asymmetricMatch({foo: 'foox'}),98 objectContaining({foo: undefined}).asymmetricMatch({}),99 ].forEach(test => {100 jestExpect(test).toEqual(false);101 });102});103test('ObjectContaining matches defined properties', () => {104 const definedPropertyObject = {};105 Object.defineProperty(definedPropertyObject, 'foo', {get: () => 'bar'});106 jestExpect(107 objectContaining({foo: 'bar'}).asymmetricMatch(definedPropertyObject),108 ).toBe(true);109});110test('ObjectContaining matches prototype properties', () => {111 const prototypeObject = {foo: 'bar'};112 let obj;113 if (Object.create) {114 obj = Object.create(prototypeObject);115 } else {116 function Foo() {}117 Foo.prototype = prototypeObject;118 Foo.prototype.constructor = Foo;119 obj = new Foo();120 }121 jestExpect(objectContaining({foo: 'bar'}).asymmetricMatch(obj)).toBe(true);122});123test('ObjectContaining throws for non-objects', () => {124 jestExpect(() => objectContaining(1337).asymmetricMatch()).toThrow();125});126test('StringContaining matches string against string', () => {127 jestExpect(stringContaining('en*').asymmetricMatch('queen*')).toBe(true);128 jestExpect(stringContaining('en').asymmetricMatch('queue')).toBe(false);129});130test('StringContaining throws for non-strings', () => {131 jestExpect(() => {132 stringContaining([1]).asymmetricMatch('queen');133 }).toThrow();134});135test('StringMatching matches string against regexp', () => {136 jestExpect(stringMatching(/​en/​).asymmetricMatch('queen')).toBe(true);137 jestExpect(stringMatching(/​en/​).asymmetricMatch('queue')).toBe(false);138});139test('StringMatching matches string against string', () => {140 jestExpect(stringMatching('en').asymmetricMatch('queen')).toBe(true);141 jestExpect(stringMatching('en').asymmetricMatch('queue')).toBe(false);142});143test('StringMatching throws for non-strings and non-regexps', () => {144 jestExpect(() => {145 stringMatching([1]).asymmetricMatch('queen');146 }).toThrow();...

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custom-asymmetric-matchers.js

Source:custom-asymmetric-matchers.js Github

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...15 return this.toString();16 }17}18class SpacexComposite extends CustomAsymmetricMatcher {19 asymmetricMatch(any) {20 return any !== undefined && typeof any === 'object';21 }22 getExpectedType() {23 return 'object';24 }25}26/​**27 * Expect metric and imperial volume numbers in object.28 */​29class SpacexVolume extends SpacexComposite {30 asymmetricMatch(any) {31 if (!super.asymmetricMatch(any)) {32 return false;33 }34 expect(any).toHaveProperty('cubic_meters');35 expect(any).toHaveProperty('cubic_feet');36 return true;37 }38 toString() {39 return 'SpacexVolume';40 }41}42/​**43 * Expect metric and imperial length (or dimension) numbers in object.44 */​45class SpacexLength extends SpacexComposite {46 asymmetricMatch(any) {47 if (!super.asymmetricMatch(any)) {48 return false;49 }50 expect(any).toHaveProperty('meters');51 expect(any).toHaveProperty('feet');52 return true;53 }54 toString() {55 return 'SpacexLength';56 }57}58/​**59 * Expect metric and imperial mass numbers in object.60 */​61class SpacexMass extends SpacexComposite {62 asymmetricMatch(any) {63 if (!super.asymmetricMatch(any)) {64 return false;65 }66 expect(any).toHaveProperty('kg');67 expect(any).toHaveProperty('lb');68 return true;69 }70 toString() {71 return 'SpacexMass';72 }73}74/​**75 * Expect metric and imperial thrust numbers in object.76 */​77class SpacexThrust extends SpacexComposite {78 asymmetricMatch(any) {79 if (!super.asymmetricMatch(any)) {80 return false;81 }82 expect(any).toHaveProperty('kN');83 expect(any).toHaveProperty('lbf');84 return true;85 }86 toString() {87 return 'SpacexThrust';88 }89}90/​**91 * Expect composite payload weight object.92 */​93class SpacexPayloadWeight extends SpacexComposite {94 asymmetricMatch(any) {95 if (!super.asymmetricMatch(any)) {96 return false;97 }98 expect(any).toHaveProperty('id');99 expect(any).toHaveProperty('name');100 expect(any).toEqual(new SpacexMass());101 return true;102 }103 toString() {104 return 'SpacexPayloadWeight';105 }106}107/​**108 * Expect composite stage information object.109 */​110class SpacexVehicleStage extends SpacexComposite {111 asymmetricMatch(any) {112 if (!super.asymmetricMatch(any)) {113 return false;114 }115 /​/​ expect(any).toHaveProperty('reusable', expect.any(Boolean))116 /​/​ expect(any).toHaveProperty('engines', expect.any(String))117 /​/​ expect(any).toHaveProperty('fuel_amount_tons', expect.any(Number))118 expect(any).toHaveProperty('burn_time_sec');119 /​/​ expect(any).toHaveProperty('thrust_sea_level', new SpacexThrust())120 /​/​ expect(any).toHaveProperty('thrust_vacuum', new SpacexThrust())121 /​/​ expect(any).toHaveProperty('payloads', expect.any(String)) /​/​122 return true;123 }124 toString() {125 return 'SpacexPayloadWeight';126 }...

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ObjectContainingSpec.js

Source:ObjectContainingSpec.js Github

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1describe("ObjectContaining", function() {2 it("matches any actual to an empty object", function() {3 var containing = new j$.ObjectContaining({});4 expect(containing.asymmetricMatch("foo")).toBe(true);5 });6 it("does not match an empty object actual", function() {7 var containing = new j$.ObjectContaining("foo");8 expect(function() {9 containing.asymmetricMatch({})10 }).toThrowError(/​not 'foo'/​)11 });12 it("matches when the key/​value pair is present in the actual", function() {13 var containing = new j$.ObjectContaining({foo: "fooVal"});14 expect(containing.asymmetricMatch({foo: "fooVal", bar: "barVal"})).toBe(true);15 });16 it("does not match when the key/​value pair is not present in the actual", function() {17 var containing = new j$.ObjectContaining({foo: "fooVal"});18 expect(containing.asymmetricMatch({bar: "barVal", quux: "quuxVal"})).toBe(false);19 });20 it("does not match when the key is present but the value is different in the actual", function() {21 var containing = new j$.ObjectContaining({foo: "other"});22 expect(containing.asymmetricMatch({foo: "fooVal", bar: "barVal"})).toBe(false);23 });24 it("jasmineToString's itself", function() {25 var containing = new j$.ObjectContaining({});26 expect(containing.jasmineToString()).toMatch("<jasmine.objectContaining");27 });28 it("matches recursively", function() {29 var containing = new j$.ObjectContaining({one: new j$.ObjectContaining({two: {}})});30 expect(containing.asymmetricMatch({one: {two: {}}})).toBe(true);31 });32 it("matches when key is present with undefined value", function() {33 var containing = new j$.ObjectContaining({ one: undefined });34 expect(containing.asymmetricMatch({ one: undefined })).toBe(true);35 });36 it("does not match when key with undefined value is not present", function() {37 var containing = new j$.ObjectContaining({ one: undefined });38 expect(containing.asymmetricMatch({})).toBe(false);39 });40 it("matches defined properties", function(){41 /​/​ IE 8 doesn't support `definePropery` on non-DOM nodes42 if (jasmine.getEnv().ieVersion < 9) { return; }43 var containing = new j$.ObjectContaining({ foo: "fooVal" });44 var definedPropertyObject = {};45 Object.defineProperty(definedPropertyObject, "foo", {46 get: function() { return "fooVal" }47 });48 expect(containing.asymmetricMatch(definedPropertyObject)).toBe(true);49 });50 it("matches prototype properties", function(){51 var containing = new j$.ObjectContaining({ foo: "fooVal" });52 var prototypeObject = {foo: "fooVal"};53 var obj;54 if (Object.create) {55 obj = Object.create(prototypeObject);56 } else {57 function Foo() {}58 Foo.prototype = prototypeObject;59 Foo.prototype.constructor = Foo;60 obj = new Foo();61 }62 expect(containing.asymmetricMatch(obj)).toBe(true);63 });...

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TruthySpec.js

Source:TruthySpec.js Github

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1describe("Truthy", function () {2 it("is true for a non empty string", function () {3 var truthy = new jasmineUnderTest.Truthy();4 expect(truthy.asymmetricMatch("foo")).toBe(true);5 expect(truthy.asymmetricMatch("")).toBe(false);6 });7 it("is true for a number that is not 0", function () {8 var truthy = new jasmineUnderTest.Truthy();9 expect(truthy.asymmetricMatch(1)).toBe(true);10 expect(truthy.asymmetricMatch(0)).toBe(false);11 expect(truthy.asymmetricMatch(-23)).toBe(true);12 expect(truthy.asymmetricMatch(-3.1)).toBe(true);13 });14 it("is true for a function", function () {15 var truthy = new jasmineUnderTest.Truthy();16 expect(truthy.asymmetricMatch(function () {17 })).toBe(true);18 });19 it("is true for an Object", function () {20 var truthy = new jasmineUnderTest.Truthy();21 expect(truthy.asymmetricMatch({})).toBe(true);22 });23 it("is true for a truthful Boolean", function () {24 var truthy = new jasmineUnderTest.Truthy();25 expect(truthy.asymmetricMatch(true)).toBe(true);26 expect(truthy.asymmetricMatch(false)).toBe(false);27 });28 it("is true for an empty object", function () {29 var truthy = new jasmineUnderTest.Truthy();30 expect(truthy.asymmetricMatch({})).toBe(true);31 });32 it("is true for an empty array", function () {33 var truthy = new jasmineUnderTest.Truthy();34 expect(truthy.asymmetricMatch([])).toBe(true);35 });36 it("is true for a date", function () {37 var truthy = new jasmineUnderTest.Truthy();38 expect(truthy.asymmetricMatch(new Date())).toBe(true);39 });40 it("is true for a infiniti", function () {41 var truthy = new jasmineUnderTest.Truthy();42 expect(truthy.asymmetricMatch(Infinity)).toBe(true);43 expect(truthy.asymmetricMatch(-Infinity)).toBe(true);44 });...

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AnythingSpec.js

Source:AnythingSpec.js Github

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1describe("Anything", function() {2 it("matches a string", function() {3 var anything = new j$.Anything();4 expect(anything.asymmetricMatch('foo')).toBe(true);5 });6 it("matches a number", function() {7 var anything = new j$.Anything();8 expect(anything.asymmetricMatch(42)).toBe(true);9 });10 it("matches an object", function() {11 var anything = new j$.Anything();12 expect(anything.asymmetricMatch({ foo: 'bar' })).toBe(true);13 });14 it("matches an array", function() {15 var anything = new j$.Anything();16 expect(anything.asymmetricMatch([1,2,3])).toBe(true);17 });18 it("doesn't match undefined", function() {19 var anything = new j$.Anything();20 expect(anything.asymmetricMatch()).toBe(false);21 expect(anything.asymmetricMatch(undefined)).toBe(false);22 });23 it("doesn't match null", function() {24 var anything = new j$.Anything();25 expect(anything.asymmetricMatch(null)).toBe(false);26 });27 it("jasmineToString's itself", function() {28 var anything = new j$.Anything();29 expect(anything.jasmineToString()).toEqual("<jasmine.anything>");30 });...

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Jest Testing Tutorial

LambdaTest’s Jest Testing Tutorial covers step-by-step guides around Jest with code examples to help you be proficient with the Jest framework. The Jest tutorial has chapters to help you learn right from the basics of Jest framework to code-based tutorials around testing react apps with Jest, perform snapshot testing, import ES modules and more.

Chapters

  1. What is Jest Framework
  2. Advantages of Jest - Jest has 3,898,000 GitHub repositories, as mentioned on its official website. Learn what makes Jest special and why Jest has gained popularity among the testing and developer community.
  3. Jest Installation - All the prerequisites and set up steps needed to help you start Jest automation testing.
  4. Using Jest with NodeJS Project - Learn how to leverage Jest framework to automate testing using a NodeJS Project.
  5. Writing First Test for Jest Framework - Get started with code-based tutorial to help you write and execute your first Jest framework testing script.
  6. Jest Vocabulary - Learn the industry renowned and official jargons of the Jest framework by digging deep into the Jest vocabulary.
  7. Unit Testing with Jest - Step-by-step tutorial to help you execute unit testing with Jest framework.
  8. Jest Basics - Learn about the most pivotal and basic features which makes Jest special.
  9. Jest Parameterized Tests - Avoid code duplication and fasten automation testing with Jest using parameterized tests. Parameterization allows you to trigger the same test scenario over different test configurations by incorporating parameters.
  10. Jest Matchers - Enforce assertions better with the help of matchers. Matchers help you compare the actual output with the expected one. Here is an example to see if the object is acquired from the correct class or not. -

|<p>it('check_object_of_Car', () => {</p><p> expect(newCar()).toBeInstanceOf(Car);</p><p> });</p>| | :- |

  1. Jest Hooks: Setup and Teardown - Learn how to set up conditions which needs to be followed by the test execution and incorporate a tear down function to free resources after the execution is complete.
  2. Jest Code Coverage - Unsure there is no code left unchecked in your application. Jest gives a specific flag called --coverage to help you generate code coverage.
  3. HTML Report Generation - Learn how to create a comprehensive HTML report based on your Jest test execution.
  4. Testing React app using Jest Framework - Learn how to test your react web-application with Jest framework in this detailed Jest tutorial.
  5. Test using LambdaTest cloud Selenium Grid - Run your Jest testing script over LambdaTest cloud-based platform and leverage parallel testing to help trim down your test execution time.
  6. Snapshot Testing for React Front Ends - Capture screenshots of your react based web-application and compare them automatically for visual anomalies with the help of Jest tutorial.
  7. Bonus: Import ES modules with Jest - ES modules are also known as ECMAScript modules. Learn how to best use them by importing in your Jest testing scripts.
  8. Jest vs Mocha vs Jasmine - Learn the key differences between the most popular JavaScript-based testing frameworks i.e. Jest, Mocha, and Jasmine.
  9. Jest FAQs(Frequently Asked Questions) - Explore the most commonly asked questions around Jest framework, with their answers.

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