{"id":5852,"date":"2022-05-30T09:00:14","date_gmt":"2022-05-30T01:00:14","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=5852"},"modified":"2022-05-30T09:00:14","modified_gmt":"2022-05-30T01:00:14","slug":"jest%e4%b8%ad%e7%9a%84snapshot%e5%bf%ab%e7%85%a7%e6%b5%8b%e8%af%95","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5852","title":{"rendered":"Jest\u4e2d\u7684Snapshot\u5feb\u7167\u6d4b\u8bd5"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

 <\/p>\n

\u81ea\u52a8\u5316\u6d4b\u8bd5
\n\u4e13\u680f\u6536\u5f55\u8be5\u5185\u5bb9
\n9 \u7bc7\u6587\u7ae00 \u8ba2\u9605
\n\u8ba2\u9605\u4e13\u680f
\n\u5f53\u6211\u4eec\u5728\u5199\u4e1a\u52a1\u4ee3\u7801\u6216\u8005\u914d\u7f6e\u6587\u4ef6\u7684\u6d4b\u8bd5\u7528\u4f8b\u65f6\uff0c\u53ef\u80fd\u4f1a\u7275\u626f\u5230\u4e0d\u65ad\u4fee\u6539\u7684\u8fc7\u7a0b\u3002\u90a3\u4e48\u5c31\u4f1a\u9762\u4e34\u7740\u4e00\u4e2a\u6bd4\u8f83\u9ebb\u70e6\u7684\u95ee\u9898\uff1a\u5c31\u662f\u6bcf\u6b21\u4fee\u6539\u4e1a\u52a1\u4ee3\u7801\u65f6\uff0c\u90fd\u8981\u76f8\u5bf9\u5e94\u7684\u4fee\u6539\u6d4b\u8bd5\u7528\u4f8b\u4e2d\u7684\u65ad\u8a00\u4ee3\u7801\u3002\u90a3\u4e48\u5982\u4f55\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u4f7f\u7528Snapshot\u5feb\u7167\u5373\u53ef\u89e3\u51b3\u8fd9\u4e2a\u5927\u9ebb\u70e6\uff01<\/p>\n

Snapshot\u5feb\u7167\u7684\u4f5c\u7528\u5c31\u662f\uff1a\u628a\u6bcf\u6b21\u4fee\u6539\u540e\u7684\u4ee3\u7801\u5f62\u6210\u5feb\u7167\uff0c\u4e0e\u4e0a\u6b21\u4ee3\u7801\u751f\u6210\u7684\u5feb\u7167\u505a\u5bf9\u6bd4\uff0c\u82e5\u6709\u4fee\u6539\u90e8\u5206\uff0c\u5219\u4f1a\u51fa\u73b0\u5f02\u5e38\u5feb\u7167\u63d0\u793a\u3002<\/p>\n

\u666e\u901a\u7684Snapshot \uff08toMatchSnapshot\uff09
\ndemo
\n\u4e1a\u52a1\u4ee3\u7801\uff1ademo.js<\/p>\n

export const generateConfig = () => {
\nreturn {
\nserver: ‘http:\/\/localhost’,
\nport: 8080,
\ndomain: ‘localhost’
\n}
\n}
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n\u6d4b\u8bd5\u4ee3\u7801\uff1ademo.test.js<\/p>\n

import { generateConfig } from ‘.\/demo’<\/p>\n

test(‘\u6d4b\u8bd5 generateConfig ‘, () => {
\n\/\/ 1.\u666e\u901a\u5339\u914d\uff0c\u6bcf\u6b21\u4fee\u6539\u914d\u7f6e\u65f6\uff0c\u90fd\u9700\u8981\u4fee\u6539\u6d4b\u8bd5\u7528\u4f8b\u4ee3\u7801
\n\/\/ expect(generateConfig()).toEqual({
\n\/\/ server: ‘http:\/\/localhost’,
\n\/\/ port: 8080,
\n\/\/ domain: ‘localhost’
\n\/\/ })
\n\/\/ 2.\u4f7f\u7528\u5feb\u7167\u5339\u914d
\nexpect(generateConfig()).toMatchSnapshot()
\n})
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n8
\n9
\n10
\n11
\n12
\ntoMatchSnapshot()\u5feb\u7167\u5339\u914d\u7684\u6267\u884c\u6d41\u7a0b\uff1a<\/p>\n

\u7b2c\u4e00\u6b21\u8fd0\u884cgenerateConfig\u51fd\u6570\u65f6\uff0c\u6ca1\u6709\u5feb\u7167\uff0c\u8c03\u7528toMatchSnapshot()\u5339\u914d\u5668\u65f6\uff0c\u4f1a\u81ea\u52a8\u5e2e\u6211\u4eec\u751f\u6210\u4e00\u4e2a\u5feb\u7167\u3002\u628agenerateConfig\u51fd\u6570\u8fd4\u56de\u7684\u5185\u5bb9\u5b58\u5230\u5feb\u7167\u91cc\u8fb9\u53bb\u3002
\n\u5f53\u6211\u4eec\u4fee\u6539\u4e1a\u52a1\u6587\u4ef6\u8fdb\u884c\u4fdd\u5b58\u540e\uff0ctoMatchSnapshot()\u53c8\u4f1a\u751f\u6210\u4e00\u6b21\u5feb\u7167\uff0c\u8ddf\u4e0a\u6b21\u751f\u6210\u7684\u5feb\u7167\u76f8\u5bf9\u6bd4\uff0c\u5982\u679c\u4e00\u81f4\uff0c\u5219\u6d4b\u8bd5\u901a\u8fc7\uff0c\u5982\u679c\u4e0d\u4e00\u81f4\uff0c\u5219\u6d4b\u8bd5\u4e0d\u901a\u8fc7\uff0c\u8bc1\u660e\u6709\u4ee3\u7801\u6539\u52a8\u3002
\n\u5feb\u7167\u6587\u4ef6\u4e3a\uff1a_ _ snapshots_ _\/demo.test.js.snap (\u5982\u4e0b)<\/p>\n

\u4fee\u6539\u4e1a\u52a1\u4ee3\u7801\uff1ademo.js\uff08\u65b0\u589etime\u914d\u7f6e\u9879\uff09<\/p>\n

export const generateConfig = () => {
\nreturn {
\nserver: ‘http:\/\/localhost’,
\nport: 8080,
\ndomain: ‘localhost’,
\ntime: ‘2019’
\n}
\n}
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n8
\n\u5f53\u4fee\u6539\u4e1a\u52a1\u4ee3\u7801\u540e\uff0c\u6d4b\u8bd5\u7528\u4f8b\u5c06\u751f\u6210\u65b0\u7684\u5feb\u7167\u548c\u4e0a\u6b21\u5feb\u7167\u5185\u5bb9\u505a\u5bf9\u6bd4\uff0c\u5bf9\u6bd4\u7ed3\u679c\u4e0d\u4e00\u81f4\uff0c\u5219\u6d4b\u8bd5\u65e0\u6cd5\u901a\u8fc7\uff1a<\/p>\n

\u540c\u65f6\u80fd\u63d0\u793a\u6211\u4eec\uff0c\u662f\u5426\u771f\u7684\u8981\u6539\u6d4b\u8bd5\u6587\u4ef6\u3002\u5982\u679c\u60f3\u4ee5\u4fee\u6539\u540e\u7684\u914d\u7f6e\u6587\u4ef6\u4e3a\u51c6\uff0c\u5219\u53ef\u5728\u547d\u4ee4\u884c\u6267\u884c \u2018w\u2019 \u547d\u4ee4\uff0c\u8fdb\u5165jest\u547d\u4ee4\u6a21\u5f0f\uff0c\u7136\u540e\u6267\u884c ‘u\u2019\u547d\u4ee4\u6765\u66f4\u65b0\u4e0d\u901a\u8fc7\u7684\u5feb\u7167\u3002<\/p>\n

\u884c\u5185\u7684Snapshot (toMatchInlineSnapshot)
\n\u4f7f\u7528\u884c\u5185Snapshot\u7684\u524d\u63d0\u662f\uff1a\u5b89\u88c5 prettier<\/p>\n

npm i prettier -D
\n1
\ndemo
\n\u4e1a\u52a1\u4ee3\u7801\uff1ademo.js<\/p>\n

export const generateAnotherConfig = () => {
\nreturn {
\nserver: ‘http:\/\/localhost’,
\nport: 8080,
\ndomain: ‘localhost’,
\ntime: new Date()
\n}
\n}
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n8
\n\u6d4b\u8bd5\u4ee3\u7801\uff1ademo.test.js<\/p>\n

import { generateAnotherConfig } from ‘.\/demo’<\/p>\n

test(‘\u6d4b\u8bd5 generateAnotherConfig ‘, () => {
\nexpect(generateAnotherConfig()).toMatchInlineSnapshot({
\ntime: expect.any(Date)
\n})
\n})
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n\u6267\u884c\u6d4b\u8bd5\uff1anpm test \u5373\u751f\u6210\u884c\u5185\u5feb\u7167 \uff08\u5982\u4e0b\uff09<\/p>\n

=> \u884c\u5185Snapshot\u548c\u666e\u901aSnapshot\u7684\u533a\u522b
\ntoMatchInlineSnapshot() \u884c\u5185Snapshot\u628a\u751f\u6210\u7684\u5feb\u7167\u653e\u5230\u4e86\u6d4b\u8bd5\u7528\u4f8b\u91cc\u8fb9\uff0c\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\u7684\u5f62\u5f0f\u4f20\u5165\u3002
\ntoMatchSnapshot() \u666e\u901aSnapshot\u4f1a\u628a\u751f\u6210\u7684\u5feb\u7167\u653e\u5230\u5355\u72ec\u7684\u6587\u4ef6\u91cc\u3002
\n=> \u66f4\u65b0\u3001\u8df3\u8fc7\u5feb\u7167
\n\u9996\u5148\uff0c\u6309 \u2018w\u2019 \u8fdb\u5165jest\u547d\u4ee4\u6a21\u5f0f\u3002<\/p>\n

\u6309 \u2018u\u2019 \u66f4\u65b0\u5feb\u7167
\n\u6309 \u2018s\u2019 \u8df3\u8fc7\u5feb\u7167
\n\u5982\u679c\u6709\u591a\u4e2aSnapshot\u53d1\u751f\u51b2\u7a81\u65f6\uff0c\u8981\u8fdb\u5165 \u2018i\u2019 \u4ea4\u4e92\u6a21\u5f0f\uff0c\u4e00\u6b21\u4e00\u6b21\u7684\u53bb\u786e\u8ba4\u6bcf\u4e2aSnapshot\u7684\u53d8\u91cf\uff0c\u786e\u8ba4\u6ca1\u95ee\u9898\u4e4b\u540e\uff0c\u7136\u540e\u5206\u522b\u6309 \u2018u\u2019 \u8fdb\u884c\u6bcf\u4e2a\u5feb\u7167\u7684\u66f4\u65b0\u3002
\n=> \u52a8\u6001\u5339\u914d expect.any
\n\u6ce8\uff1a \u5f53\u6211\u4eec\u7684\u4e1a\u52a1\u4ee3\u7801\u662f\u52a8\u6001\u6539\u53d8\u7684\u65f6\u5019\uff0c\u90a3\u4e48\u6bcf\u6b21\u751f\u6210\u7684\u6d4b\u8bd5\u5feb\u7167\u90fd\u662f\u4e0d\u540c\u7684\uff0c\u5c31\u4f1a\u5bfc\u81f4\u6211\u4eec\u7684\u6d4b\u8bd5\u7528\u4f8b\u6bcf\u6b21\u90fd\u65e0\u6cd5\u901a\u8fc7\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728\u5339\u914d\u5668\u91cc\u505a\u6570\u636e\u7684\u7c7b\u578b\u9650\u5236\uff0c\u8fdb\u884c\u5feb\u7167\u6d4b\u8bd5\u3002\u4f8b\u5982\uff1a
\n\u4e1a\u52a1\u4ee3\u7801\uff1ademo.js<\/p>\n

export const generateConfig = () => {
\nreturn {
\nserver: ‘http:\/\/localhost’,
\nport: 8080,
\ndomain: ‘localhost’,
\ntime: new Date() \/\/ \u53d6\u5f53\u524d\u65f6\u95f4
\n}
\n}
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n8
\n\u6d4b\u8bd5\u4ee3\u7801\uff1ademo.test.js<\/p>\n

import { generateConfig } from ‘.\/demo’<\/p>\n

test(‘\u6d4b\u8bd5 generateConfig ‘, () => {
\nexpect(generateConfig()).toMatchSnapshot({
\ntime: expect.any(Date) \/\/ \u9650\u5236\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u4e3aNumber\/String\/Object\u7b49
\n})
\n})
\n1
\n2
\n3
\n4
\n5
\n6
\n7
\n\u5728\u5339\u914d\u5668\u4e2d\u4f7f\u7528expect.any\u505a\u6570\u636e\u7684\u7c7b\u578b\u9650\u5236\u540e\uff0c\u5f53\u518d\u6b21\u751f\u6210\u6d4b\u8bd5\u5feb\u7167\u65f6\uff0c\u53ea\u8981\u8fd9\u6b21\u7684time\u662fDate\u7c7b\u578b\uff0c\u5373\u53ef\u901a\u8fc7\u6d4b\u8bd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u539f\u6587\u5730\u5740   \u81ea\u52a8\u5316\u6d4b\u8bd5 \u4e13\u680f<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[24],"tags":[121],"class_list":["post-5852","post","type-post","status-publish","format-standard","hentry","category-value_docs","tag-05-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5852","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=5852"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5852\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=5852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=5852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=5852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}