{"id":31392,"date":"2024-11-25T10:51:40","date_gmt":"2024-11-25T02:51:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/31392\/"},"modified":"2024-11-25T10:51:40","modified_gmt":"2024-11-25T02:51:40","slug":"jest%e6%b5%8b%e8%af%95react-native%e7%bb%84%e4%bb%b6%e7%9a%84%e6%ad%a5%e5%a5%8f%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/31392\/","title":{"rendered":"jest\u6d4b\u8bd5react native\u7ec4\u4ef6\u7684\u6b65\u594f\u662f\u4ec0\u4e48"},"content":{"rendered":"<p style=\"text-align: left\">\u8fd9\u6b21\u7ed9\u5927\u5bb6\u5e26\u6765jest\u6d4b\u8bd5react native\u7ec4\u4ef6\u7684\u6b65\u594f\u662f\u4ec0\u4e48\uff0cjest\u6d4b\u8bd5react native\u7ec4\u4ef6\u7684\u6709\u54ea\u4e9b\uff0c\u4e0b\u9762\u5c31\u662f\u5b9e\u6218\u6848\u4f8b\uff0c\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u3002<\/p>\n<p style=\"text-align: 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\u6811\u8fdb\u884c\u5feb\u7167\u6216\u522b\u7684\u5e8f\u5217\u5316\u6570\u503c\u5feb\u901f\u7f16\u5199\u6d4b\u8bd5\uff0c\u63d0\u4f9b\u5feb\u901f\u66f4\u65b0\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u652f\u6301\u5f02\u6b65\u4ee3\u7801\u6d4b\u8bd5\uff1a\u652f\u6301promises\u548casync\/await<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u81ea\u52a8\u751f\u6210\u9759\u6001\u5206\u6790\u7ed3\u679c\uff1a\u4e0d\u4ec5\u663e\u793a\u6d4b\u8bd5\u7528\u4f8b\u6267\u884c\u7ed3\u679c\uff0c\u4e5f\u663e\u793a\u8bed\u53e5\u3001\u5206\u652f\u3001\u51fd\u6570\u7b49\u8986\u76d6\u7387\u3002<\/p>\n<\/li>\n<\/ol>\n<p style=\"text-align: left\"><strong>\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u5355\u5143\u6d4b\u8bd5\u5de5\u5177<\/strong><\/p>\n<p style=\"text-align: left\">\u6211\u4eec\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u4e0d\u4f7f\u7528\u6d4b\u8bd5\u5de5\u5177\u4f9d\u7136\u53ef\u4ee5\u81ea\u5df1\u5199\u4ee3\u7801\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5\uff0c\u4f46\u662f\u6211\u4eec\u7684\u4ee3\u7801\u5b58\u5728\u7740\u76f8\u4e92\u8c03\u7528\u5173\u7cfb\uff0c\u5728\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\u6211\u4eec\u53c8\u5e0c\u671b\u4f7f\u5355\u5143\u76f8\u5bf9\u72ec\u7acb\u800c\u53c8\u80fd\u6b63\u5e38\u8fd0\u884c\uff0c\u5c31\u9700\u8981\u6211\u4eec\u5bf9\u88ab\u6d4b\u51fd\u6570\u7684\u4f9d\u8d56\u51fd\u6570\u548c\u73af\u5883\u8fdb\u884cmock\uff0c\u5e76\u4e14\u5728\u6d4b\u8bd5\u6570\u636e\u8f93\u5165\u3001\u6d4b\u8bd5\u6267\u884c\u548c\u6d4b\u8bd5\u7ed3\u679c\u68c0\u67e5\u65b9\u9762\u5b58\u5728\u5f88\u591a\u76f8\u4f3c\u6027\uff0c\u6d4b\u8bd5\u5de5\u5177\u6b63\u662f\u4e3a\u6211\u4eec\u5728\u8fd9\u4e9b\u65b9\u9762\u63d0\u4f9b\u4e86\u65b9\u4fbf\u3002<\/p>\n<p style=\"text-align: left\"><strong>\u51c6\u5907\u9636\u6bb5<\/strong><\/p>\n<p style=\"text-align: left\">\u9700\u8981\u4e00\u4e2arn\u9879\u76ee\uff0c\u8fd9\u91cc\u6f14\u793a\u7684\u662f\u6211\u4e2a\u4eba\u7684\u9879\u76eeReactNative-ReduxSaga-TODO<\/p>\n<p style=\"text-align: left\">\u5b89\u88c5jest<\/p>\n<p style=\"text-align: left\">\u5982\u679c\u4f60\u662f\u7528react-native init\u547d\u4ee4\u884c\u521b\u5efa\u7684rn\u9879\u76ee\uff0c\u5e76\u4e14\u4f60\u7684rn\u7248\u672c\u57280.38\u4ee5\u4e0a\uff0c\u5219\u65e0\u9700\u5b89\u88c5\u4e86\u3002\u4e0d\u592a\u6e05\u695a\u7684\u8bdd\u5c31\u770b\u4e00\u4e0b<\/p>\n<p style=\"text-align: left\">package.json\u6587\u4ef6\u4e2d\u662f\u5426\u5305\u542b\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre> \/\/ package.json\r\n \"scripts\": {\r\n  \"test\": \"jest\"\r\n },\r\n \"jest\": {\r\n  \"preset\": \"react-native\"\r\n }<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p style=\"text-align: left\">\u5982\u679c\u6ca1\u6709\u5c31\u5b89\u88c5\u4e00\u4e0bnpm i jest &#8211;save-dev\uff0c\u5e76\u628a\u4e0a\u8ff0\u4ee3\u7801\u6dfb\u52a0\u5230package.json\u6587\u4ef6\u7684\u5bf9\u5e94\u4f4d\u7f6e\u3002<\/p>\n<p style=\"text-align: left\">\u4ee5\u4e0a\u6b65\u9aa4\u5b8c\u6210\u540e\uff0c\u7b80\u5355\u8fd0\u884cnpm run test\u6d4b\u8bd5\u4e00\u4e0bjest\u662f\u5426\u914d\u7f6e\u6210\u529f\u3002\u4f46\u6211\u4eec\u6ca1\u6709\u5199\u6d4b\u8bd5\u7528\u4f8b\uff0c\u7ec8\u7aef\u4f1a\u6253\u5370no tests found\u3002\u8fd9\u65f6\u5c31\u914d\u7f6e\u5b8c\u6210\u4e86\u3002<\/p>\n<p style=\"text-align: left\"><strong>\u5feb\u7167\u6d4b\u8bd5<\/strong><\/p>\n<p style=\"text-align: left\">\u5199\u4e00\u4e2a\u7ec4\u4ef6<\/p>\n<pre>import React from 'react';\r\nimport {\r\n Text, View,\r\n} from 'react-native';\r\nimport PropTypes from 'prop-types';\r\nconst PostArea = ({ title, text, color }) =&gt; (\r\n &lt;View style={{ backgroundColor: '#ddd', height: 100 }}&gt;\r\n  &lt;Text style={{ fontSize: 30 }}&gt;{title}&lt;\/Text&gt;\r\n  &lt;Text style={{ fontSize: 15, color }}&gt;{text}&lt;\/Text&gt;\r\n &lt;\/View&gt;\r\n);\r\nexport default PostArea;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p style=\"text-align: left\">\u5728\u9879\u76ee\u6839\u76ee\u5f55\u4e0b\u627e\u5230test\u6587\u4ef6\u5939\uff0c\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u4f7f\u7528React\u7684\u6d4b\u8bd5\u6e32\u67d3\u5668\u548cJest\u7684\u5feb\u7167\u529f\u80fd\u6765\u4e0e\u7ec4\u4ef6\u8fdb\u884c\u4ea4\u4e92\uff0c\u5e76\u6355\u83b7\u5448\u73b0\u7684\u8f93\u51fa\u5e76\u521b\u5efa\u4e00\u4e2a\u5feb\u7167\u6587\u4ef6\u3002<\/p>\n<pre>\/\/ PostArea_test.js\r\nimport 'react-native';\r\nimport React from 'react';\r\nimport PostArea from '..\/js\/Twitter\/PostArea';\r\nimport renderer from 'react-test-renderer';\r\ntest('renders correctly', () =&gt; {\r\n const tree = renderer.create(&lt;PostArea title=\"title\" text=\"text\" color=\"red\" \/&gt;).toJSON();\r\n expect(tree).toMatchSnapshot();\r\n});<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p style=\"text-align: left\">\u7136\u540e\u5728\u7ec8\u7aef\u8fd0\u884cnpm run test\u6216jest\u3002\u5c06\u4f1a\u8f93\u51fa\uff1a<\/p>\n<blockquote style=\"text-align: left\">\n<p style=\"text-align: left\">PASS&nbsp; testsPostArea_test.js (6.657s)<br \/>&nbsp; \u221a renders correctly (5553ms)<\/p>\n<p style=\"text-align: left\">&nbsp;\u203a 1 snapshot written.<br \/>Snapshot Summary<br \/>&nbsp;\u203a 1 snapshot written in 1 test suite.<\/p>\n<p style=\"text-align: left\">Test Suites: 1 passed, 1 total<br \/>Tests:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1 passed, 1 total<br \/>Snapshots:&nbsp;&nbsp; 1 added, 1 total<br \/>Time:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8.198s<br \/>Ran all test suites.<\/p>\n<\/blockquote>\n<p style=\"text-align: left\">\u540c\u65f6\uff0c\u5728test\u6587\u4ef6\u5939\u4e0b\u4f1a\u8f93\u51fa\u4e00\u4e2a\u6587\u4ef6\uff0c\u5373\u4e3a\u751f\u6210\u7684\u5feb\u7167\u3002<\/p>\n<pre>\/\/ Jest Snapshot v1, https:\/\/goo.gl\/fbAQLP\r\nexports[`renders correctly 1`] = `\r\n&lt;View\r\n style={\r\n  Object {\r\n   \"backgroundColor\": \"#ddd\",\r\n   \"height\": 100,\r\n  }\r\n }\r\n&gt;\r\n &lt;Text\r\n  accessible={true}\r\n  allowFontScaling={true}\r\n  disabled={false}\r\n  ellipsizeMode=\"tail\"\r\n  style={\r\n   Object {\r\n    \"fontSize\": 30,\r\n   }\r\n  }\r\n &gt;\r\n  title\r\n &lt;\/Text&gt;\r\n &lt;Text\r\n  accessible={true}\r\n  allowFontScaling={true}\r\n  disabled={false}\r\n  ellipsizeMode=\"tail\"\r\n  style={\r\n   Object {\r\n    \"color\": \"red\",\r\n    \"fontSize\": 15,\r\n   }\r\n  }\r\n &gt;\r\n  text\r\n &lt;\/Text&gt;\r\n&lt;\/View&gt;\r\n`;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p style=\"text-align: left\"><strong>\u4fee\u6539\u6e90\u6587\u4ef6<\/strong><\/p>\n<p style=\"text-align: left\">\u5728\u4e0b\u4e00\u6b21\u8fd0\u884c\u6d4b\u8bd5\u7684\u65f6\u5019\uff0c\u5448\u73b0\u7684\u8f93\u51fa\u5c06\u4e0e\u4e4b\u524d\u521b\u5efa\u7684\u5feb\u7167\u8fdb\u884c\u6bd4\u8f83\u3002\u5feb\u7167\u5e94\u8be5\u548c\u4ee3\u7801\u4e00\u8d77\u63d0\u4ea4\u3002\u5f53\u5feb\u7167\u6d4b\u8bd5\u5931\u8d25\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u68c0\u67e5\u662f\u5426\u6709\u610f\u6216\u65e0\u610f\u7684\u66f4\u6539\u3002\u5982\u679c\u662f\u548c\u9884\u671f\u4e2d\u7684\u53d8\u5316\u4e00\u6837\uff0c\u8c03\u7528jest -u\u6765\u8986\u76d6\u5f53\u524d\u7684\u5feb\u7167\u3002<\/p>\n<p style=\"text-align: left\">\u6211\u4eec\u6765\u66f4\u6539\u4e00\u4e0b\u539f\u6765\u7684\u4ee3\u7801\uff1a\u628a\u7b2c\u4e8c\u884c \u7684\u5b57\u53f7\u6539\u4e3a14. <\/p>\n<pre>&lt;Text style={{ fontSize: 14, color }}&gt;{text}&lt;\/Text&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p style=\"text-align: left\">\u8fd9\u65f6\uff0c\u6211\u4eec\u518d\u8fd0\u884cjest\u3002\u8fd9\u65f6\u7ec8\u7aef\u5c06\u4f1a\u629b\u51fa\u9519\u8bef\uff0c\u5e76\u6307\u51fa\u4e86\u9519\u8bef\u4f4d\u7f6e<\/p>\n<p style=\"text-align: left\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/061\/021\/28c1e86433031b3dc6d5bc3f9a3055e7-0.png\" style=\"max-width:90%\" class=\"aligncenter\" title=\"jest\u6d4b\u8bd5react native\u7ec4\u4ef6\u7684\u6b65\u594f\u662f\u4ec0\u4e48\u63d2\u56fe\" alt=\"jest\u6d4b\u8bd5react native\u7ec4\u4ef6\u7684\u6b65\u594f\u662f\u4ec0\u4e48\u63d2\u56fe\" \/><\/p>\n<p style=\"text-align: left\">\u56e0\u4e3a\u8fd9\u6bb5\u4ee3\u7801\u662f\u6211\u4eec\u6709\u610f\u6539\u7684\uff0c\u8fd9\u65f6\u8fd0\u884cjest 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