我的ng test的输出如下：
> ng test
24 12 2019 14:20:07.854:WARN [karma]: No captured browser, open http://localhost:9876/
24 12 2019 14:20:07.860:INFO [karma-server]: Karma v4.4.1 server started at http://0.0.0.0:9876/
24 12 2019 14:20:07.860:INFO [launcher]: Launching browsers ChromeNoSandbox with concurrency unlimited
24 12 2019 14:20:07.865:INFO [launcher]: Starting browser ChromeHeadless
app/shared/forms/templates/templates.component.ts:11:1 - error TS6133: 'MatDialog' is declared but its value is never read.
11 import { MatDialog } from '@angular/material';
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 12 2019 14:20:11.633:INFO [HeadlessChrome 79.0.3945 (Mac OS X 10.15.2)]: Connected on socket 9OfTSV7nahQakrDOAAAA with id 85821004
HeadlessChrome 79.0.3945 (Mac OS X 10.15.2): Executed 0 of 0 SUCCESS (0 secs / 0 secs)
HeadlessChrome 79.0.3945 (Mac OS X 10.15.2): Executed 0 of 0 SUCCESS (0.002 secs / 0 secs)
TOTAL: 0 SUCCESS
TOTAL: 0 SUCCESS
我遇到的问题是，如果我的src代码中出现any掉线错误，那么单元测试将无法运行，当我只想在这里和那里尝试测试驱动开发时，这非常不方便。我宁愿仅收到这些掉毛错误的警告，也可以立即修复所有问题。
我使用的是Angular版本，"@angular/core": "8.1.2"和Karma版本：
"karma": "4.4.1",
"karma-chrome-launcher": "3.1.0",
"karma-cli": "2.0.0",
"karma-coverage-istanbul-reporter": "2.1.1",
"karma-jasmine": "2.0.1",
"karma-jasmine-html-reporter": "1.4.2",
"karma-junit-reporter": "2.0.1",
"karma-verbose-reporter": "0.0.6",
在Angular 7上我没有任何问题，无论是否发生掉毛错误，我的单元测试都将执行。我不确定应该更改什么或应该检查哪种配置以阻止这种情况的发生。
最终目标是使单元测试能够运行，而不管毛发错误的发生频率如何。
angular.json包含测试的配置：
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"karmaConfig": "./karma.conf.js",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
...etc...
karma.conf
// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html
module.exports = function (config) {
config.set({
basePath: '',
frameworks: ['jasmine', '@angular-devkit/build-angular'],
plugins: [
require('karma-jasmine'),
require('karma-chrome-launcher'),
require('karma-jasmine-html-reporter'),
require('karma-junit-reporter'),
require('karma-coverage-istanbul-reporter'),
require('@angular-devkit/build-angular/plugins/karma'),
require('karma-verbose-reporter')
],
client:{
clearContext: false // leave Jasmine Spec Runner output visible in browser
},
coverageIstanbulReporter: {
dir: require('path').join(__dirname, 'coverage'), reports: [ 'html', 'lcovonly' ],
fixWebpackSourcePaths: true
},
reporters: config.angularCli && config.angularCli.codeCoverage ? ['progress', 'coverage-istanbul', 'junit'] : ['progress', 'kjhtml'],
port: 9876,
colors: true,
logLevel: config.LOG_INFO,
autoWatch: true,
browsers: ['ChromeNoSandbox'],
singleRun: false,
junitReporter: {
outputDir: process.env.JUNIT_REPORT_PATH,
outputFile: process.env.JUNIT_REPORT_NAME,
useBrowserName: false
},
customLaunchers: {
ChromeNoSandbox: {
base: 'ChromeHeadless',
flags: ['--no-sandbox']
}
}
});
};
这是TypeScript错误，这意味着noUnusedLocals中的true被设置为tsconfig.spec.json。
我认为您可以创建继承的配置，即tsconfig.spec.dev.json（使用“扩展”：“ ./ tsconfig.spec.json”），并用noUnusedLocals覆盖false值。然后，您需要添加configurations部分：
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.dev.json",
"karmaConfig": "karma.conf.js",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.css"
],
"scripts": []
},
"configurations": {
"production": {
"tsConfig": "tsconfig.spec.json"
}
}
}
现在您可以将dev作为ng test或prod作为ng test --prod。