jest mock reset

Solutions on MaxInterview for jest mock reset by the best coders in the world

Search
showing results for - "jest mock reset"
Odele
26 Aug 2016
1test("mockFn.mockReset", () => {
2  const mockFn = jest.fn().mockImplementation(() => 43);
3  const MockClass = jest.fn();
4
5  new MockClass();
6  expect(mockFn()).toBe(43);
7
8  expect(mockFn.mock.calls).toHaveLength(1);
9  expect(MockClass.mock.instances).toHaveLength(1);
10
11  mockFn.mockReset();
12  MockClass.mockReset();
13
14  new MockClass();
15  expect(mockFn()).toBeUndefined();
16
17  expect(mockFn.mock.calls).toHaveLength(1);
18  expect(MockClass.mock.instances).toHaveLength(1);
19});
Leane
17 Nov 2019
1test("mock.calls", () => {
2  const mockFn = jest.fn();
3  mockFn(1, 2);
4
5  expect(mockFn.mock.calls).toEqual([[1, 2]]);
6});
Sherman
29 Feb 2017
1// equvalent to mockReset
2
3test("mockFn.mockRestore", () => {
4  const StringUtils = {
5    toUpperCase(arg) {
6      return arg && arg.toUpperCase();
7    }
8  };
9
10  const spy = jest.spyOn(StringUtils, "toUpperCase").mockImplementation(() => "MOCK");
11
12  expect(StringUtils.toUpperCase("arg")).toBe("MOCK");
13  expect(spy).toHaveBeenCalledTimes(1);
14  expect(jest.isMockFunction(StringUtils.toUpperCase)).toBeTruthy();
15
16  spy.mockRestore();
17
18  expect(spy("arg")).toBeUndefined();
19  expect(jest.isMockFunction(StringUtils.toUpperCase)).not.toBeTruthy();
20  expect(StringUtils.toUpperCase("arg")).toBe("ARG");
21  expect(spy).toHaveBeenCalledTimes(1);
22 
23});
similar questions
jest mock classjest mockclearjest mock implementationjest create react app only run one testhow to mock a library in jestmock a function jest reactjest mock react redux hookstesting with jestjest manual mock node modulejest mock mocknamejest mock instancejest mock createobjecturl
queries leading to this page
jest mock clear examplejest mock 28 27component 27 29 3b jest mock calls not workingjest mock use objects functionmock method in a class jestjest mock functinosclear value of mockreturnvalue in jestjest mock resolved value to nulldifference between mockimplementationonce and mockimplementationclearmocks after eachmock jest functionjest fn all callshow to use jest mocksspyon mockrestore 28 29mock client jestjest mock module functionmock an api in jestjest calls api before mockjest mock reset is not workingjest clear mock instancesjest mock requestjest mock 28 22 22 29reset calls jestjest mock calljest mock require restorehow to mock function jestwhy use jest mockjest mockshow to mock methods jestjest mock distroy callback functionjest mockimplementationjest when to reset mocksmock api jestjest is mock functionmock restorejest mock empty function typescriptspy function jestjest mock a return in a funcionho to mock jest requestjest fn 28 29 examplespy a function jestjest spy on a functionhwo to mock a js function in jestjest reset all mocksjest mock resetmock call function jestmock get method jestjest mock simple js functionmockimplementation promisemock this method jestjest mock beforeeach resetjest import mockjest mock function in componentjest mock client function callmockreset jest alljest beforeeach mock resetmock jest api calljest cbhow to use jest mockjest utils mock restore original functionjest mock function and it still fails to runjest destroy mock jest class mockjest restoreallmocks vs resetallmocksjest spu returnsjest mock apiclear mock calls jestreset jest mockmockimplementation examplemockfn mockreturnthis 28 29jest clear all spyonjest get mock namejest mock mock promisejest spy on mockmock a function in jestmock resetjest clear all mocksjest mock then functionmockclear 28 29 using jestmock function en jestreset jest mocksjest restore mocksjest mock callback functionjest mock a functionmock data using jestmock function call in jestenzyme clear jest mockjest mock call actual functionmock a method return jestjest class method mockjest mock when called withjest fn mockreturnvaluejest mock method inside methodstop 3a jest fn 28 29 mockresolvedvalue 28 28 29 3d 3e 7b next 3a jest fn 28 29 mockresolvedvalue 28null 29 7d 29 2cjest fun mockjest mock function in modulejest node mock functionrestore mock jestmock api call jestjest reset instance mocksenzyme clear jest mock tohavebeencalledtimesmock restore jestjest mock librarywhy mock in jestmock function with callback jestjest to mock function calls in main functionjest mock callsclear mockjest mock function implementationhow to mock callback function in jestjest reset mock spyjest reset mock before eachjest mock function resetjest mock check callsclear mock jestreact jest mock function calljest how to mock a function calljest mock functinsmock class call jestmock a function call in jestmock jest mock local method call jestjest api mocksmock a class jestrequest callback mock jestjest mock a classmock method in jest jest mock global methodjest reset only mock calls preserve implementationmockimplementation call originaljest fetch mockmock function in jest examplemock in jestjest mock library functionjest mock not resettingjest mock ajvhow to mock method return jestimport jest mockhow to mock function on jestjest throw error mockjest mock restore statejest mock call throughjest mock classjest mock a function in a componentmock jest function returnjest reset mockjest mock tutorialreset mock jestjest mock mock return value in javascriptjest mocking apidifferent mocks jestjest react mock a functionjest mock calls argumentsjest mock get funcctionjest mock request responsejest mock function with argumentsmock function return jestmock function in jest componentymockimplementation jestjest mock 28 29jest example mockmock implementation once in jestjest get all calls for mockjest spy mock implementationcreating mocks jestjest mock an existing functionmock callback function jestjest spy on function if calledjest mock implementation twicejest for all reset mocksjest mock request and responsemock util function jestuse object in jest mockunable to clear all mocks jest test casesjest spy mock restorejest restoreallmocks beforeeachjest set mock calls onejest expect mock to be called withjest remove mockjest mockclearjest mockfunction call after apijest how to mock not have functionjest mock cleardifference jest mockrestore mockclearreset module mock jestjest mock datajest mokeimplementationoncereact mock function jestjest mock 28 27 2fhow to reset all mockreturnvalue in jestjest clear mock after each testmock implementation of function jest examplehow to clear mockreturnvaluejest reset mocks manuallyjest when should we mock a classjest how to mockjest clear the mock valuejest mock a functionwhen is mock restore requiredjest react auto mock reset oncejest fn mock typesjest clear spies between testsjest manually restore mockjest fnuses of mock function in jest examplehow to mock get function in jestjest spyon clearhow to mock function in jest with nodejsjest clearmockuse mock api in jestjest mock return functuionwhen should we mock functions in testing using jestjest mock class methodsmock js request with jestmock single method jest modulejest mock api calls examplemock api calls in jestjest clear mock implementationspy on function jestjest mockresolvedvalueonce response datamockimplementationonce return promisejest how to mock a functionjest docs mock functionsjest restore mockcreate a mock function jestjest mock methodsjest class mock 3f how to clear mock jestjest reset mock between testsjest mock clearmock specific function jestjest function mockjest fn argsjest fn 28 29 mockresolvedvaluewhat is mock in jestjest unit testing javascript mock functionsjest mock function from modulejest mock component funcitonjest mockoncejest mock function in componentjest clear mock return valuereset mock after each test jestmock reset jestjest mock functionhow to test function in jest mockspying on a fucntion jesthow to make a mock function return value in jestjest unit test mock functionmock only a method jestjest clear all mocks vs reset all mocksjust mock functionjest mock any functionmockimplementation with various outputs jestjest mock clear vs resetrestore mockmock function implementation jestjest mockimplementation with functionsjest mock fucntionjest after each reset mockjest mock class functionjest mock method secondjest mock service callreset jest function calllsmock component method jestjest mockimmock single method jestwhat is jest fn 28 28 29mock import jestjest mock componentsjest mock functionjest mock classjest mock examplejest mock function calljest mock calls 0jest mock 28 22 22 2c 28 29 3d 3e 7b 7d 29mock call in jest docsjest clear mock callshow to reset value jest fn 28jest import function and mockjest mock resolvesjest how to clear resutt testmock request in jestinstall jest and mockmanual mock example jesthow to clear mock for spyonjest clear mocks after eachjest clear mock functionjest fn 28 29 resolveshow can reset mockreturnvalue in jestjest mock function for all testsjest mock importjest mock vs jest mock functionclear mock after test jesthow to reset mockreturnvalueclear dispatch mock jestjavascript jest mock apijest mock resolved valuejest mockimplementation and covered numbers of call 3a 0jest mock component callbackjest beforeeach reset mockclear mocks jestmock function jest testjest spy mockimplementationundo a mock jestmock function response jestmock an api call jestjest mock serviceclear mocksmock function jestjest mock typejest remove all mockspromise jest mockjest mock method of componentjest api mockjest reset mock in setup filejest test mock callsmock calls jestclear spyon jestmock fnctions jestclear certain mock jestjest mock return valuemock class jestjest mock servicejest reset mockshow to mock function in jestjest fn resolvesjest mock methods in classjest mock connectionmocks jestjest clearmocksjest clear all mocksjest mock implementation oncemock external call in jestwhy do you have to restore mock jestmock implementation jestjest mock callbackjest mock function from importjest mock errorjest mock implementation examplejest spyon to mock a function callmock function jest reactjest mock function in functionjest mock function nodehow to clear mock in jestjest api call mockmockresolvedvalue jestmockhttp call in jestreset entire module mock jestjest fn return arrayjest fnmock callback jestjest mockcomponenthow to mock api calls in jestjest import from mocksclear jest mock mock calls jestjest mock request modulejest mock responsejest mock vs jest mockfunctionjest reset mock functionstop 3a jest fn 28 29 mockresolvedvalue 28 28 29jest mock implementationjest reset call countresponse mock jesthest reset mocksresetting method calls nested jestjest mock single methodjest mock function with return valuejest mock functions examplemock func jestmock api call in jestjest reset mock implementationjest mock function with callbackjest mock restore functionjest mock last calljest mockimplementationjest mock use real functionmock functions in compontent jestjest mock function called withhow to mock this function in jestjest mock resolved value once vs mocked resolve valuejest mock isn 27t clearingmock a method jesthave one test remove mock jestjest mock function thishow to use jest mock with node jsjest mock a this method mock callback function in jestjest mockup functionjest clear mocksjest mock use real methodjest mock implementation of function with callbackjest mock modulemock function with jestjest exect call callback mockjest mock errorhow to mock this 24 jestwhat is jest mockhow to put jest mock inside testmock class function jestjest fnget calls mock jestjest mock function return valuemock out components jesthow to clear mockjest mock fonctionjest mock calls instancesjest mock api callhow to mock a function in jestmock function in jestmock jest componentjest clear mockjest spy on functionjest mock nodejs api calljest mock this stop 3a jest fn 28 29 mockresolvedvalue 28 28 29 3d 3e 7bnext 3a jest fn 28 29 mockresolvedvalue 28null 29 7d 29 2cjest clear function calljest mock function and return valuereturn mock jestmock new jestmock this in jestjest mock requirejest mock a funcjest reset mock callsjest mock functino without spyjest mock return value when called withmock resethow to reset jest fnjest expect mock to be calledhow to do mock reset in it jestjest mocjest mock connectjest reset mock after each testhow to mock a function call mock jestjest reset mock importjest clear spyon mockjest mock add functionjest mock in describehow to mock functions in jestmock class method jestmockresolvedvalueonce errorjest get mock callsjest mock on a particular testreset mock value in each test function jestmocks with jestjest mock method of classjest mock a function callcan jest mock be inside testmock return of a function jestjest mock restore not workingclass mock jestspyon reset number of callsjest mock constructormock instance jestjest check what mock function was called withjest mock object methodmock function return jesthow to mock a function written in jesthow to reset all mock in jestjest mock mocknamejest mock function call timeundoing jest mockreset mocks jestusing a mock function in jestjest mockimplementation call originalhow to mock a util function in jestmock functions jestcreate react app jest reset mockshow to mock method in jestjest mock call real m c3 a9thodjest mock fun return valuejest mock a component methodmockrestore 28 29jest mock implementation httpjest mock a callbackhow to mock require jestjest mock function calledadding mock to jest functionjest functionjest mockrestjest manual mock classjset reset calls on mocked modulejest mock reset callsjest mock component callhow to reset jest mockjest mock responsemock clear jestjest mock return componentjest reset all mock functionsjest mock call originalreset mock function in it jestwhat are mock in jestapi call mock in jestpromise mock in jestcreate a function mock jestclear mocks jhestjest mock api callsjest mock return mock functionjest fn 28 29 mockimplementationjest 2b mock callback functionhow to mock a function call in jestmock module jestjest fn resetmock get function jestjest mock function call api nodejsmock your own function in jestjest beforeeach clear mocksjest mock tfunctionhow to check return mock function jestjest spy resetfetch mockimplementationmockimplementation 2b jest 2b reactjest mock funstionmock a function as new jestjest mock restorejest spy mock resultmock jest fnjest mock a function with a callbackjest restore specific mockundo mock jestmock functions using mockreturnvalueonce in jestjest mock function reset callsmock module functions jestjset reset all jest fn callsjest mock manualhow to call a mock fuction using jestjest mockrestorejest set mocksjest mock functionsjest fn 28jest mock funcitonjest restore all mocksjest mock reset vs clearjest mock with promisejest how to reset mock datarestore jest 2cmockcallback in jest mockjest mock all methodsjest mock apijest mockjest mock request objectjest diable spywhat is mock funtion jesthow to mock a function using jestclear mock implementation jestmock a method in jestjest mock re mockmock a function with jest exampleto create a mock function we use jest fn 28 29jest reset spyreset jest mockjest mock reset number of callsjest fn mockjest clear function callsjest mock an arrayjest mock componentjest mockresolvedvaluemock resolved value enzymejest mock dispatch clean clearjest fn create mockhow to mock an api call jestjest mock http callmock a function jestjest mock second callwhat happens if u dont restore a mockreact testing library mockimplementationjest mock expect to be calledjest mockmockimplementation vs jest fncreating a mock in jest testmock function example jest is an array that records all the object instances that have been instantiated from the mock function using new mock a component jesthow to jest mock a functionjest mock resetjest mock should call callbackjest mock call api falsejest mock implementation promisejest mock msaljest mock callsjest mock implementation callbackhow to setup jest mockjest mock use module function jest mock 28function 29 mockimplementationreset mock function jestreset all mock in jestmock result jesthow to mock a component in jestjest mock restorejest moking an arrayreset all mocks jestmock fucntion jestjest mock 28 27 27 29 3bjest mock resetting a mockmock clear is not a function in jestjest import from mockjest global mock functionmock component jestcreate a mock jestjest clear manual mockhow to mock different function call in jestjest mock return functionautomatic mock function jestjest mock class methodjest mock reset