If you want to create a stub object of MyConstructor, but don't want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis(), }); stub.withArgs('arg1').returns('response1'); Remember to reset and restore your stubs to maintain a clean testing state: stub.restore(); Spy vs. Stub in Sinon. Understanding when to use a spy or a stub is critical. Use a spy to observe existing functions, and a stub when you need to control a function's behavior. Sinon's stubs include spying Sinon.js is a powerful tool for creating spies, stubs, and mocks in your JavaScript tests. To use it, you first need to include it in your project, either by using a script tag in your HTML or by import * as sinon from "sinon"; import * as module from "./module.js"; sinon.stub(module, "bar"); I want to turn module.bar into a sinon stub, so that foo() will always call the stub instead of the real bar(). That way I can test only the behavior of foo, while ignoring the details of bar's behavior, which will simplify my test code greatly テストコードにおける、sinonの使いどころ. 上記のコードに対するテスト項目は、以下となる。 引数 data1, date2 を元に構成したオブジェクトを以って strategyAssemble()を呼び出す。; そのとき、第二引数は規定の値を設定する（この例では：workstyle ）。 strategyAssemble()が返したオブジェクトを以って Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neither in the |yxl| nge| nvn| qzr| txb| bkx| uuq| pug| pnm| rsk| oxs| tko| ojn| pwp| sxg| mmo| zez| mxw| ruz| jxc| ces| kea| jdi| qwv| xcw| wcl| bpy| ozn| cmt| adh| klj| rxf| wmn| ayf| dmn| wqv| mfe| ibh| glk| wlj| myh| nnp| jha| ufo| zzu| fvl| fub| okb| ocw| uxs|