{"id":38799,"date":"2023-09-29T06:02:57","date_gmt":"2023-06-30T05:20:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90angular%e3%80%91%e4%bd%bf%e7%94%a8jest%e8%ae%bf%e9%97%ae%e5%ad%90%e7%bb%84%e4%bb%b6\/"},"modified":"2024-01-15T10:01:41","modified_gmt":"2024-01-15T02:01:41","slug":"%e3%80%90angular%e3%80%91%e4%bd%bf%e7%94%a8jest%e8%ae%bf%e9%97%ae%e5%ad%90%e7%bb%84%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90angular%e3%80%91%e4%bd%bf%e7%94%a8jest%e8%ae%bf%e9%97%ae%e5%ad%90%e7%bb%84%e4%bb%b6\/","title":{"rendered":"\u3010Angular\u3011\u4f7f\u7528Jest\u8bbf\u95ee\u5b50\u7ec4\u4ef6"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u6211\u5728\u4f7f\u7528Jest\u5bf9Angular UI\u7ec4\u4ef6\u4e4b\u4e00\u7684primeNg\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5\u65f6\uff0c\u60f3\u8981\u4f7f\u7528Angular Material\u4e2d\u7684Harnesses\u3002\u7136\u800c\uff0cprimeNg\u4e2d\u5e76\u6ca1\u6709\u76f8\u5e94\u7684Harnesses\uff0c\u6240\u4ee5\u6211\u627e\u5230\u4e86\u4e00\u4e2a\u66ff\u4ee3\u65b9\u6848\u5e76\u4e0e\u5927\u5bb6\u5206\u4eab\u3002<\/p>\n<h1>\u6982\u62ec\uff1a<\/h1>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">debugEl<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">fixture<\/span><span class=\"p\">.<\/span><span class=\"nx\">debugElement<\/span><span class=\"p\">.<\/span><span class=\"nf\">query<\/span><span class=\"p\">(<\/span><span class=\"nx\">By<\/span><span class=\"p\">.<\/span><span class=\"nf\">directive<\/span><span class=\"p\">(<\/span><span class=\"nx\">GrandchildComponent<\/span><span class=\"p\">));<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">grandchildComponentInstance<\/span><span class=\"p\">:<\/span> <span class=\"nx\">GrandchildComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">debugEl<\/span><span class=\"p\">.<\/span><span class=\"nx\">componentInstance<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nx\">GrandchildComponent<\/span><span class=\"p\">.<\/span><span class=\"nf\">method<\/span><span class=\"p\">();<\/span>\r\n<\/code><\/pre>\n<h1>\u76ee\u6807\u7ec4\u4ef6<\/h1>\n<p>\u6211\u5c06\u4f7f\u7528Jest\u6765\u6d4b\u8bd5\u8fd9\u4e2a\u3002<br \/>\n\u6839\u636e\u300c\u5f00\u59cb\u300d\u90e8\u5206\u7684\u8bf4\u660e\uff0c\u6211\u5c06\u4f7f\u7528primeNg\u3002<br \/>\n\u6b64\u5916\uff0c\u6211\u5c06\u4f7f\u7528\u72ec\u7acb\u7ec4\u4ef6\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n<h2>HTML (Hypertext Markup Language)\u662f\u4e00\u79cd\u7528\u4e8e\u521b\u5efa\u7f51\u9875\u7684\u6807\u8bb0\u8bed\u8a00\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;div&gt;<\/span>\r\n  <span class=\"nt\">&lt;div&gt;<\/span>first = {{ first }}<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n  <span class=\"nt\">&lt;div&gt;<\/span>rows = {{ rows }}<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n  <span class=\"nt\">&lt;p-paginator<\/span>\r\n    <span class=\"na\">(onPageChange)=<\/span><span class=\"s\">\"onPageChange($event)\"<\/span>\r\n    <span class=\"na\">[first]=<\/span><span class=\"s\">\"first\"<\/span>\r\n    <span class=\"na\">[rows]=<\/span><span class=\"s\">\"rows\"<\/span>\r\n    <span class=\"na\">[totalRecords]=<\/span><span class=\"s\">\"120\"<\/span>\r\n  <span class=\"nt\">&gt;&lt;\/p-paginator&gt;<\/span>\r\n<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n<\/code><\/pre>\n<h2>TypeScript -&gt; TypeScript\u662f TypeScript<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Component<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">CommonModule<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/common<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">PaginatorModule<\/span><span class=\"p\">,<\/span> <span class=\"nx\">PaginatorState<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">primeng\/paginator<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Component<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">selector<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">app-target<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">standalone<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">imports<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nx\">CommonModule<\/span><span class=\"p\">,<\/span> <span class=\"nx\">PaginatorModule<\/span><span class=\"p\">],<\/span>\r\n  <span class=\"na\">templateUrl<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/target.component.html<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">styleUrls<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/target.component.scss<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">AppTargetComponent<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">first<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nx\">rows<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"nf\">onPageChange<\/span><span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">:<\/span> <span class=\"nx\">PaginatorState<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span> <span class=\"o\">??<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u5f00\u73a9\u7b11<\/h1>\n<p>\u6211\u4eec\u5c06\u6d4b\u8bd5\u5f53\u4f7f\u7528\u4e0a\u8ff0\u7ec4\u4ef6\u8fdb\u884c\u9875\u9762\u8df3\u8f6c\u65f6\uff0c\u5f53\u53d1\u51faonPageChange\u65f6\u7684\u884c\u4e3a\u3002\u6211\u4eec\u5c06\u4f7f\u7528test paginator\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ComponentFixture<\/span><span class=\"p\">,<\/span> <span class=\"nx\">TestBed<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core\/testing<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">By<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/platform-browser<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Paginator<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">primeng\/paginator<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">AppTargetComponent<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/target.component<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nf\">describe<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">AppTargetComponent<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">let<\/span> <span class=\"na\">component<\/span><span class=\"p\">:<\/span> <span class=\"nx\">AppTargetComponent<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"kd\">let<\/span> <span class=\"na\">fixture<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ComponentFixture<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">AppTargetComponent<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"nf\">beforeEach<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">TestBed<\/span><span class=\"p\">.<\/span><span class=\"nf\">configureTestingModule<\/span><span class=\"p\">({<\/span>\r\n      <span class=\"na\">imports<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nx\">AppTargetComponent<\/span><span class=\"p\">],<\/span>\r\n    <span class=\"p\">});<\/span>\r\n    <span class=\"nx\">fixture<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">TestBed<\/span><span class=\"p\">.<\/span><span class=\"nf\">createComponent<\/span><span class=\"p\">(<\/span><span class=\"nx\">AppTargetComponent<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nx\">component<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">fixture<\/span><span class=\"p\">.<\/span><span class=\"nx\">componentInstance<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nx\">fixture<\/span><span class=\"p\">.<\/span><span class=\"nf\">detectChanges<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">});<\/span>\r\n\r\n  <span class=\"nf\">it<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">should create<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">expect<\/span><span class=\"p\">(<\/span><span class=\"nx\">component<\/span><span class=\"p\">).<\/span><span class=\"nf\">toBeTruthy<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">});<\/span>\r\n\r\n  <span class=\"nf\">it<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">test paginator<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">debugEl<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">fixture<\/span><span class=\"p\">.<\/span><span class=\"nx\">debugElement<\/span><span class=\"p\">.<\/span><span class=\"nf\">query<\/span><span class=\"p\">(<\/span><span class=\"nx\">By<\/span><span class=\"p\">.<\/span><span class=\"nf\">directive<\/span><span class=\"p\">(<\/span><span class=\"nx\">Paginator<\/span><span class=\"p\">));<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"na\">paginatorComponentInstance<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Paginator<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">debugEl<\/span><span class=\"p\">.<\/span><span class=\"nx\">componentInstance<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nx\">paginatorComponentInstance<\/span><span class=\"p\">.<\/span><span class=\"nx\">onPageChange<\/span><span class=\"p\">.<\/span><span class=\"nf\">emit<\/span><span class=\"p\">({<\/span>\r\n      <span class=\"na\">page<\/span><span class=\"p\">:<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span>\r\n      <span class=\"na\">first<\/span><span class=\"p\">:<\/span> <span class=\"mi\">30<\/span><span class=\"p\">,<\/span>\r\n      <span class=\"na\">rows<\/span><span class=\"p\">:<\/span> <span class=\"mi\">10<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">});<\/span>\r\n    <span class=\"nf\">expect<\/span><span class=\"p\">(<\/span><span class=\"nx\">component<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span><span class=\"p\">).<\/span><span class=\"nf\">toEqual<\/span><span class=\"p\">(<\/span><span class=\"mi\">30<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">});<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<p>\u9996\u5148<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">fixture<\/span><span class=\"p\">.<\/span><span class=\"nx\">debugElement<\/span><span class=\"p\">.<\/span><span class=\"nf\">query<\/span><span class=\"p\">(<\/span><span class=\"nx\">By<\/span><span class=\"p\">.<\/span><span class=\"nf\">directive<\/span><span class=\"p\">(<\/span><span class=\"nx\">Paginator<\/span><span class=\"p\">));<\/span>\r\n<\/code><\/pre>\n<p>\u8bf7\u4ece\u76ee\u6807\u7ec4\u4ef6\u7684DOM\u4e2d\u9009\u62e9p-paginator\u3002<br \/>\np-paginator \u5728Paginator\u548c\u6587\u6863\u4e2d\uff0c\u6240\u4ee5\u8981\u6309\u539f\u6837\u6307\u5b9a\u3002<br \/>\n\u4f46\u662f\uff0c\u8fd9\u662f\u4e00\u4e2a DebugElement\uff0c\u6240\u4ee5\u8981\u4f7f\u7528 debugEl.componentInstance \u6765\u83b7\u53d6\u8be5\u7ec4\u4ef6\u5b9e\u4f8b\u3002<br \/>\n\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3cAngular\u7684ViewChild\u884c\u4e3a\u3002<\/p>\n<p>\u7136\u540e\uff0c\u6211\u4eec\u4ece\u7ec4\u4ef6\u5b9e\u4f8b\u4e2d\u8c03\u7528\u60f3\u8981\u8c03\u7528\u7684\u65b9\u6cd5\uff08\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5e0c\u671b\u6d4b\u8bd5\u5206\u9875\u65f6\u7684\u884c\u4e3a\uff0c\u6240\u4ee5\u6211\u4eec\u8c03\u7528\u4e86OnPageChange\u88ab\u89e6\u53d1\u7684\u65b9\u6cd5\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">onPageChange<\/span><span class=\"p\">(<\/span><span class=\"nx\">event<\/span><span class=\"p\">:<\/span> <span class=\"nx\">PaginatorState<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">event<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span> <span class=\"o\">??<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">first<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7531\u4e8e\u5bf9\u9996\u503c\u8fdb\u884c\u4e86\u66f4\u65b0\uff0c\u8bf7\u4f7f\u7528 expect(component.first).toEqual(30) \u6765\u786e\u8ba4\u6240\u9700\u503c\u662f\u5426\u5b58\u5728\uff0c\u5e76\u5b8c\u6210\u64cd\u4f5c\u3002<\/p>\n<h1>\u7ed3\u675f<\/h1>\n<p>\u7531\u65bc\u7121\u6cd5\u627e\u5230\u76f8\u95dc\u8cc7\u6599\uff0c\u56e0\u6b64\u6211\u5beb\u4e86\u4e0b\u9762\u7684\u7b54\u6848\u3002\u5c07\u6b64\u4f5c\u7d50\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u5728\u4f7f\u7528Jest\u5bf9Angular UI\u7ec4\u4ef6\u4e4b\u4e00\u7684primeNg\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5\u65f6\uff0c\u60f3\u8981\u4f7f\u7528Angular M [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38799","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010Angular\u3011\u4f7f\u7528Jest\u8bbf\u95ee\u5b50\u7ec4\u4ef6 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010angular\u3011\u4f7f\u7528jest\u8bbf\u95ee\u5b50\u7ec4\u4ef6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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