{"id":16657,"date":"2022-02-11T15:41:31","date_gmt":"2022-02-11T06:41:31","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=16657"},"modified":"2023-09-26T23:02:33","modified_gmt":"2023-09-26T14:02:33","slug":"%e3%80%90redux%e3%80%91%e3%80%8creducer%e3%80%8d%e3%81%ae%e3%83%86%e3%82%b9%e3%83%88","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=16657","title":{"rendered":"\u3010Redux\u3011Redux Tool Kit\u306e\u300cReducer\u300d\u306e\u30c6\u30b9\u30c8"},"content":{"rendered":"\n

\u500b\u5225\u306eReducer\u306e\u307f\u3092\u30c6\u30b9\u30c8\u3059\u308b\u5834\u5408<\/h2>\n\n\n\n

\u901a\u5e38\u306e\u4f8b<\/h3>\n\n\n\n
import reducer from \"..\/src\/\u30b9\u30e9\u30a4\u30b9\u306e\u30d1\u30b9\";\n\ndescribe(\"xxx action\", () => {\n    let initialState = {\n      mode: 0,\n      value: 1,\n    };\n    it(\"\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\uff11\", () => {\n      const action = { type: xxx };\n      const state = reducer(initialState, action);\n      expect(state.value).toEqual(2);\n    });\n}<\/pre>\n\n\n\n
ExtraReducer\u306e\u5834\u5408<\/h3>\n\n\n\n
\u975e\u540c\u671f\u306e\u7d50\u679c\u304c\u5931\u6557\u3057\u305f\u5834\u5408\u3068\u6210\u529f\u3057\u305f\u5834\u5408\u306a\u3069\u3067\u69d8\u3005\u306a\u30b1\u30fc\u30b9\u3067\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
import reducer, {\n  \u975e\u540c\u671f\u306e\u95a2\u6570,\n} from \"..\/src\/\u30b9\u30e9\u30a4\u30b9\";\n\ndescribe(\"extraReducers\", () => {\n  const initialState = {\n    mode: 0,\n    value: 0,\n  };\n  it(\"fulfiled\u306e\u5834\u5408\", () => {\n    const action = { type: \u975e\u540c\u671f\u306e\u95a2\u6570.fulfilled.type, payload: 1 };\n    const state = reducer(initialState, action);\n    expect(state.value).toEqual(xxx);\n  });\n  it(\"rejected\u306e\u5834\u5408\", () => {\n    const action = { type: \u975e\u540c\u671f\u306e\u95a2\u6570.rejected.type, payload: 2 };\n    const state = reducer(initialState, action);\n    expect(state.value).toEqual(yyy);\n  });\n});<\/pre>\n\n\n\n
\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u306e\u7d50\u5408\u30c6\u30b9\u30c8\u3092\u3059\u308b\u5834\u5408<\/h2>\n\n\n\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3054\u3068\u306bstore\u3092\u751f\u6210\u3057\u3001\u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u30e9\u30c3\u30d7\u3057\u307e\u3059\u3002\u305d\u3046\u3059\u308b\u3053\u3068\u3067Redux\u3068\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u7d50\u5408\u30c6\u30b9\u30c8\u3092\u884c\u3046\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u3001Redux\u306estore\u3092\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u5074\u3067\u4f5c\u308b\u5834\u5408\u306fRedux\u5074\u306einitialState\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u5074\u3067initialState\u3092\u7528\u610f\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n
import React from \"react\";\nimport { render, screen, cleanup } from \"@testing-library\/react\";\nimport userEvent from \"@testing-library\/user-event\";\nimport { Provider } from \"react-redux\";\nimport \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8 from \".\/\u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\";\nimport { configureStore } from \"@reduxjs\/toolkit\";\nimport \u500b\u5225\u306eReducer from \"..\/src\/\u500b\u5225\u306eslice\";\n\nafterEach(() => {\n  cleanup();\n});\n\ndescribe(\"Redux\u3068\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u7d50\u5408\u30c6\u30b9\u30c8\", () => {\n  let store;\n  beforeEach(() => {\n    store = configureStore({\n      reducer: {\n        \u500b\u5225\u306eReducer,\n      },\n    });\n  });\n  it(\"\u4efb\u610f\u306e\u30c6\u30b9\u30c8\", () => {\n    render(\n      <Provider store={store}>\n        <\u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8 \/>\n      <\/Provider>\n    );\n    userEvent.click(screen.getByText(\"xxx\"));\n    expect(screen.getByTestId(\"yyyy\")).toHaveTextContent(3);\n  });<\/pre>\n","protected":false},"excerpt":{"rendered":"\u500b\u5225\u306eReducer\u306e\u307f\u3092\u30c6\u30b9\u30c8\u3059\u308b\u5834\u5408 \u901a\u5e38\u306e\u4f8b import reducer from \"..\/src\/\u30b9\u30e9\u30a4\u30b9\u306e\u30d1\u30b9\"; describe(\"xxx action\", () => { let initialS […]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[117],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/16657"}],"collection":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16657"}],"version-history":[{"count":8,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/16657\/revisions"}],"predecessor-version":[{"id":23213,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/16657\/revisions\/23213"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16657"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}