用于TypeScript应用程序测试的Angular 2 – 规格在茉莉花中多次

发布时间：2020-12-17 17:35:11 所属栏目：安全来源：网络整理

导读：我已经按照本教程测试Angular 2应用程序： https://angular.io/docs/ts/latest/guide/testing.html 完成第一个应用程序测试部分并转到unit-tests.html后,我看到我的规范报告多次出现：虽然我没有对教程代码进行任何更改,但是为了快速参考,我的unit-tests.ht

我已经按照本教程测试Angular 2应用程序： https://angular.io/docs/ts/latest/guide/testing.html

完成第一个应用程序测试部分并转到unit-tests.html后,我看到我的规范报告多次出现：

jasmine unit-tests.html

虽然我没有对教程代码进行任何更改,但是为了快速参考,我的unit-tests.html是：

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=utf-8">
    <title>Ng App Unit Tests</title>

    <link rel="stylesheet" href="node_modules/jasmine-core/lib/jasmine-core/jasmine.css">

    <script src="node_modules/jasmine-core/lib/jasmine-core/jasmine.js"></script>
    <script src="node_modules/jasmine-core/lib/jasmine-core/jasmine-html.js"></script>
    <script src="node_modules/jasmine-core/lib/jasmine-core/boot.js"></script>
</head>
<body>
<!-- #1. add the system.js library -->
<script src="node_modules/systemjs/dist/system-polyfills.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>

<script>
    // #2. Configure systemjs to use the .js extension
    //     for imports from the app folder
    System.config({
        packages: {
            'app': {defaultExtension: 'js'}
        }
    });

    // #3. Import the spec file explicitly
    System.import('app/hero.spec')

    // #4. wait for all imports to load ...
    //     then re-execute `window.onload` which
    //     triggers the Jasmine test-runner start
    //     or explain what went wrong.
            .then(window.onload)
            .catch(console.error.bind(console));
</script>
</body>

</html>

hero.spec.ts

import {Hero} from './hero';

describe('Hero',() => {
    it('has name',() => {
        let hero:Hero = {id: 1,name: 'Super Cat'};
        expect(hero.name).toEqual('Super Cat');
    });
    it('has id',name: 'Super Cat'};
        expect(hero.id).toEqual(1);
    });
});

什么可能出错？

解决方法

由于我之前的评论标记为已删除,我写下了我的最终解决方案以驱逐问题.这个解决方案有效,唯一的问题是它第一次显示带有“未找到规格”文本的HTML页面,但是当加载所有模块时,它会显示所有规格及其结果.

这个解决方案是由曼宁早期访问计划的“Angular 2开发与TypeScript v7 MEAP”一书所采用的：

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="content-type" content="text/html;charset=utf-8">
    <title>Unit Tests</title>
    <link rel="stylesheet" href="node_modules/jasmine-core/lib/jasmine-core/jasmine.css">
    <!-- #1. Polyfills -->
    <script src="node_modules/reflect-metadata/Reflect.js"></script>
    <!-- #2. Zone.js dependencies -->
    <script src="node_modules/zone.js/dist/zone.js"></script>
    <script src="node_modules/zone.js/dist/async-test.js"></script>
    <script src="node_modules/zone.js/dist/fake-async-test.js"></script>
    <!-- #3. Add specs dependencies -->
    <script src="app/treeNode.spec.ts"></script>
    <script src="app/template.spec.ts"></script>
    <script src="app/services/tree.side.service.spec.ts"></script>
    <script src="app/services/tree.service.spec.ts"></script>
    <!-- #4. Add Jasmine dependencies -->
    <script src="node_modules/jasmine-core/lib/jasmine-core/jasmine.js"></script>
    <script src="node_modules/jasmine-core/lib/jasmine-core/jasmine-html.js"></script>
    <script src="node_modules/jasmine-core/lib/jasmine-core/boot.js"></script>
    <script src="node_modules/jasmine-expect/dist/jasmine-matchers.js"></script>
    <!-- #5. Add the system.js library -->
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <script>System.packageWithIndex = true;</script>
    <script src="systemjs.config.js"></script>

    <script>
        // #6. Configure SystemJS to use the .js extension for imports from the app folder
        System.config({
            packages: {
                'app': {defaultExtension: 'js'}
            }
        });

        var SPEC_MODULES = [
            'app/treeNode.spec','app/template.spec','app/services/tree.side.service.spec','app/services/tree.service.spec'
        ];

        /**
         * #7. Import the spec files explicitly
         */
        Promise.all([
            System.import('@angular/core/testing'),System.import('@angular/platform-browser-dynamic/testing')
        ])
        .then(function (modules) {
            var testing = modules[0];
            var testingBrowser = modules[1];
            testing.TestBed.initTestEnvironment(testingBrowser.BrowserDynamicTestingModule,testingBrowser.platformBrowserDynamicTesting());
            return Promise.all(SPEC_MODULES.map(function (module) {
                return System.import(module);
            }));
        })
        .then(window.onload)
        .catch(console.error.bind(console));
    </script>
</head>
<body>
</body>
</html>

我希望你发现这个解决方案很有用.

（编辑：李大同）

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