{"id":13187,"date":"2021-02-11T12:01:48","date_gmt":"2021-02-11T03:01:48","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=13187"},"modified":"2023-05-27T22:14:38","modified_gmt":"2023-05-27T13:14:38","slug":"%e3%80%90react%e3%80%91%e3%80%8creact-testing-library%e3%80%8d%e3%81%ae%e3%80%8crender%e3%80%8d%e3%83%86%e3%82%b9%e3%83%88","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=13187","title":{"rendered":"\u3010React\u3011\u300creact-testing-library\u300d\u306e\u300cRender\u300d\u30c6\u30b9\u30c8"},"content":{"rendered":"

Render.js<\/h2>\n

\u4ee5\u4e0b\u306e\u3088\u3046\u306aHTML\u3092\u8fd4\u3057\u3066\u304f\u308c\u308b\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30ca\u30eb\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u4f5c\u308a\u307e\u3059\u3002<\/p>\n

import React from \"react\";\r\n\r\nconst Render = () => {\r\n  return (\r\n    <div>\r\n      <h1>\u898b\u51fa\u3057<\/h1>\r\n      <input type=\"text\" \/>\r\n      <button>\u30dc\u30bf\u30f3\u30bf\u30b0<\/button>\r\n      <p>P\u30bf\u30b0<\/p>\r\n    <\/div>\r\n  );\r\n};\r\n\r\nexport default Render;\r\n<\/pre>\n
Render.test.js<\/h2>\n
import React from \"react\";\r\nimport { render, screen } from \"@testing-library\/react\";\r\nimport Render from \".\/Render\";\r\n\r\ndescribe(\"Rendering\", () => {\r\n  it(\"\u5168\u3066\u306e\u8981\u7d20\u304c\u6b63\u5e38\u306b\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u3053\u3068\", () => {\r\n    render(<Render \/>);\r\n    expect(screen.getByRole(\"heading\")).toBeTruthy();\r\n    expect(screen.getByRole(\"textbox\")).toBeTruthy();\r\n    expect(screen.getAllByRole(\"button\")[0]).toBeTruthy();\r\n    expect(screen.getByText(\"p\u30bf\u30b0\")).toBeTruthy();\r\n    expect(screen.queryByText(\"\u30dc\u30bf\u30f3\u30bf\u30b0xxxx\")).toBeNull(); \r\n    expect(screen.queryByText(\"\u30dc\u30bf\u30f3\u30bf\u30b0xxxx\").innerHTML).toBe(\"\u3042\u3042\u3042\");\r\n\r\n  });\r\n});<\/pre>\n
describe<\/h3>\n
\u30c6\u30b9\u30c8\u306e\u30bf\u30a4\u30c8\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
it<\/h3>\n
\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
render(<Render \/>);<\/h3>\n
import\u3057\u3066\u3044\u305fRender\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5185\u5bb9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n
screen.debug();<\/h4>\n
\u30c6\u30b9\u30c8\u306b\u306f\u76f4\u63a5\u95a2\u4fc2\u306a\u3044\u3067\u3059\u304c\u3001\u3053\u308c\u3092\u4f7f\u3048\u3070\u5b9f\u969b\u306brender\u3067\u3069\u306e\u3088\u3046\u306a\u5185\u5bb9\u306eHTML\u306e\u69cb\u9020\u304c\u53d6\u5f97\u3067\u304d\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n
screen.getByRole(\"\u30ed\u30fc\u30eb\u540d\")<\/h3>\n
h1\u306a\u3069\u306e\u898b\u51fa\u3057\u30bf\u30b0\u306e\u5185\u5bb9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u300cscreen.debug(screen.getByRole(\"heading\"))\u300d\u3068\u6307\u5b9a\u3059\u308c\u3070\u3001\u5b9f\u969b\u306b\u53d6\u5f97\u3067\u304d\u305f\u898b\u51fa\u3057\u30bf\u30b0\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\u3067\u304d\u305f\u308a\u3057\u307e\u3059\u3002\u6307\u5b9a\u3057\u3066\u3044\u308bRole\u306b\u95a2\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u306b\u8f09\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
https:\/\/github.com\/A11yance\/aria-query#elements-to-roles<\/p>\n
\n
screen.getAllByRole(\"\u30ed\u30fc\u30eb\u540d\")[0]<\/h3>\n
\u5168\u3066\u306e\u8981\u7d20\u3092\u914d\u5217\u3067\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u5177\u4f53\u7684\u306a\u8981\u7d20\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306f[0]\u7b49\u306b\u3088\u308a\u914d\u5217\u306e\u5177\u4f53\u7684\u306a\u756a\u5730\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n
\n
screen.getByText(\"\u30c6\u30ad\u30b9\u30c8\u540d\")<\/h3>\n
HTML\u8981\u7d20\u5185\u306e\u30c6\u30ad\u30b9\u30c8\u5185\u5bb9\u3092\u63a2\u7d22\u3057\u307e\u3059\u3002\u623b\u308a\u5024\u3068\u3057\u3066\u306f\u3001\u8a72\u5f53\u3059\u308b\u6587\u5b57\u5217\u3068\u30bf\u30b0\u3092\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002(\u4e0a\u306e\u4f8b\u3067\u8a00\u3048\u3070\u300c<p>P\u30bf\u30b0<\/p>\u300d\u3092\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002\uff09<\/div>\n
\n
\n
screen.queryByText(\"\u30c6\u30ad\u30b9\u30c8\u540d\")<\/h3>\n
getByText\u3068\u9055\u3044\u3001\u8a72\u5f53\u3057\u306a\u3044\u5834\u5408\u306fnull\u3092\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u306a\u306e\u3067\u30c6\u30ad\u30b9\u30c8\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u306e\u30c1\u30a7\u30c3\u30af\u3092\u3057\u305f\u3044\u5834\u5408\u306f\u3053\u3061\u3089\u3092\u4f7f\u3044\u307e\u3059\u3002getByText\u3060\u3068\u5b58\u5728\u3057\u306a\u3044\u3068\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u691c\u8a3c\u3067\u304d\u306a\u3044\u305f\u3081<\/strong><\/span>\u3067\u3059\u3002<\/div>\n
\n
\n
screen.getByTestId(\"ID\u540d\")<\/h3>\n
\u30bf\u30b0\u306e\u4e2d\u306bID\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u30c1\u30a7\u30c3\u30af\u3067\u304d\u307e\u3059\u3002<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
screen.getByPlaceholderText(\"\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u30fc\u3067\u8a2d\u5b9a\u3057\u305f\u540d\u524d\")<\/h3>\n
\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u30fc\u3067\u8a2d\u5b9a\u3057\u305f\u540d\u524d\u306e\u691c\u8a3c\u3092\u884c\u3048\u307e\u3059\u3002<\/p>\n
.innerHTML<\/h3>\n
\u30bf\u30b0\u306e\u30c6\u30ad\u30b9\u30c8\u5185\u5bb9\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n
expect<\/h3>\n
\u5224\u5b9a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n
toBeTruthy()\uff1aJest\u306e\u30de\u30c3\u30c1\u30e3\u30fc<\/h4>\n
\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u30c1\u30a7\u30c3\u30af\u3092\u3057\u307e\u3059\u3002<\/p>\n
\n
toBeNull()<\/h4>\n
\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002<\/div>\n<\/div>\n
\u30c6\u30b9\u30c8\u306e\u5b9f\u884c<\/h2>\n
\u4e0b\u8a18\u30b3\u30de\u30f3\u30c9\u3067\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
npm test<\/pre>\n","protected":false},"excerpt":{"rendered":"Render.js \u4ee5\u4e0b\u306e\u3088\u3046\u306aHTML\u3092\u8fd4\u3057\u3066\u304f\u308c\u308b\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30ca\u30eb\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u4f5c\u308a\u307e\u3059\u3002 import React from \"react\"; const Render = () => { return ( […]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[116],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13187"}],"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=13187"}],"version-history":[{"count":10,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13187\/revisions"}],"predecessor-version":[{"id":20439,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13187\/revisions\/20439"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13187"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13187"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}