{"description":"Jest \u3067\u66f8\u304b\u308c\u305f\u8907\u96d1\u306a\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3067\u3044\u308b\u3068\u3001 \u30e2\u30c3\u30af\u95a2\u6570\u3067\u3042\u308b jest.fn() \u3068 jest.spyOn() \u306e\u7528\u6cd5\u3067\u6df7\u4e71\u3057\u3066\u3057\u307e\u3046\u306e\u3067\u3001\u8d85\u30b7\u30f3\u30d7\u30eb\u306a\u30b3\u30fc\u30c9\u3067\u8981\u70b9\u3092\u62bc\u3055\u3048\u3066\u304a\u304f\u3002\u81ea\u5206\u7528\u30e1\u30e2\u3002 jest.fn() test(\"jest.fn\", () => { const mockFn = jest.fn(); mockFn(1,2); expect(mockFn).toHaveBeenCalledWith(1,2); }); \u7121\u304b\u3089\u30e2\u30c3\u30af\u95a2\u6570\u3092\u751f\u307f\u51fa\u305b\u308b\u3002 \u9069\u5f53\u306a\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6307\u5b9a\u3057\u305f\u3044\u6642\u3068\u304b\u306b\u4fbf\u5229\u3002 .mockReturnValue() .mockImplementatio\u2026","width":"100%","author_name":"sanjyuku","title":"jest.fn() \u3068 jest.spyOn() \u306e\u7528\u6cd5\u306e\u9055\u3044","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Faya-cat-g-tech.hatenadiary.jp%2Fentry%2F2024%2F09%2F09%2F134638\" title=\"jest.fn() \u3068 jest.spyOn() \u306e\u7528\u6cd5\u306e\u9055\u3044 - \u306e\u3053\u306e\u3053\u304b\u305a\u306e\u3053\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u306e\u3053\u306e\u3053\u304b\u305a\u306e\u3053","provider_name":"Hatena Blog","published":"2024-09-09 13:46:38","url":"https://aya-cat-g-tech.hatenadiary.jp/entry/2024/09/09/134638","provider_url":"https://hatena.blog","blog_url":"https://aya-cat-g-tech.hatenadiary.jp/","categories":["Jest"],"image_url":null,"author_url":"https://blog.hatena.ne.jp/sanjyuku/","version":"1.0","height":"190","type":"rich"}