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February 20, 2019 11:40
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Mock Test with jest.mock
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| import * as app from "./app"; | |
| import * as math from "./math"; | |
| // Set all module functions to jest.fn | |
| jest.mock("./math.js"); | |
| test("calls math.add", () => { | |
| app.doAdd(1, 2); | |
| expect(math.add).toHaveBeenCalledWith(1, 2); | |
| }); | |
| test("calls math.subtract", () => { | |
| app.doSubtract(1, 2); | |
| expect(math.subtract).toHaveBeenCalledWith(1, 2); | |
| }); |
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