Javascript karma-test-shim.js调用TestBed.initTestEnvironment,但没有效果。必须再次初始化测试床
我目前正在尝试使用Angular2 final和karma+jasmine进行单元测试 我有以下问题:Javascript karma-test-shim.js调用TestBed.initTestEnvironment,但没有效果。必须再次初始化测试床,javascript,unit-testing,angular,karma-jasmine,angular2-testing,Javascript,Unit Testing,Angular,Karma Jasmine,Angular2 Testing,我目前正在尝试使用Angular2 final和karma+jasmine进行单元测试 我有以下问题: TypeError:如果不添加,则无法读取null的属性“injector:TestBed.initTestEnvironment(BrowserDynamicTestingModule,platformBrowserDynamicTesting()) .配置测试模块({ 声明:[], 提供者:[资料], 进口:[材料] }); 对我的测试 但是我只能调用initTestEnvironment
TypeError:如果不添加,则无法读取null的属性“injector:TestBed.initTestEnvironment(BrowserDynamicTestingModule,platformBrowserDynamicTesting())
.配置测试模块({
声明:[],
提供者:[资料],
进口:[材料]
});代码>
对我的测试
但是我只能调用initTestEnvironment
和configureTestingModule
一次,因此不可能进行多个测试。我想避免进行初始化测试
这是我的karma-test-shim.js
// #docregion
// /*global jasmine, __karma__, window*/
Error.stackTraceLimit = 0; // "No stacktrace"" is usually best for app testing.
// Uncomment to get full stacktrace output. Sometimes helpful, usually not.
// Error.stackTraceLimit = Infinity; //
jasmine.DEFAULT_TIMEOUT_INTERVAL = 1000;
var builtPath = '/base/app/';
__karma__.loaded = function () { };
function isJsFile(path) {
return path.slice(-3) == '.js';
}
function isSpecFile(path) {
return /\.spec\.(.*\.)?js$/.test(path);
}
function isBuiltFile(path) {
return isJsFile(path) && (path.substr(0, builtPath.length) == builtPath);
}
var allSpecFiles = Object.keys(window.__karma__.files)
.filter(isSpecFile)
.filter(isBuiltFile);
System.config({
baseURL: '/base',
// Extend usual application package list with test folder
packages: { 'testing': { main: 'index.js', defaultExtension: 'js' } },
// Assume npm: is set in `paths` in systemjs.config
// Map the angular testing umd bundles
map: {
'@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
'@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
'@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
'@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
'@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
'@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
'@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
'@angular/forms/testing': 'npm:@angular/forms/bundles/forms-testing.umd.js',
},
});
System.import('systemjs.config.js')
.then(importSystemJsExtras)
.then(initTestBed)
.then(initTesting);
/** Optional SystemJS configuration extras. Keep going w/o it */
function importSystemJsExtras(){
return System.import('systemjs.config.extras.js')
.catch(function(reason) {
console.log(
'WARNING: System.import could not load "systemjs.config.extras.js"; continuing without it.'
);
console.log(reason);
});
}
function initTestBed(){
return Promise.all([
System.import('@angular/core/testing'),
System.import('@angular/platform-browser-dynamic/testing')
])
.then(function (providers) {
var coreTesting = providers[0];
var browserTesting = providers[1];
console.log("call initTestEnvironment")
coreTesting.TestBed.initTestEnvironment(
browserTesting.BrowserDynamicTestingModule,
browserTesting.platformBrowserDynamicTesting());
console.log("call configure teting module")
coreTesting.TestBed.configureTestingModule({
declarations: [],
providers: [],
imports: []
})
})
}
// Import all spec files and start karma
function initTesting () {
return Promise.all(
allSpecFiles.map(function (moduleName) {
return System.import(moduleName);
})
)
.then(__karma__.start, __karma__.error);
}
我认为在测试垫片中调用initTestEnvironment就足够了。我很惊讶,karma-test-shim.js中的调用似乎没有效果
package.json和代码在一个相关的问题中:
非常感谢您的帮助。如果TestBed.initTestEnvironment
已在垫片中,则无需在测试中再次调用它。您是否确认垫片正在使用?您是否将其添加到karma配置中?是的,我看到日志输出:console.log(“调用配置teting模块”)。但是我得到了错误:TypeError:无法读取null的属性“injector”。我需要调用TestBed.initTestEnvironment(BrowserDynamicTestingModule,platformBrowserDynamicTesting())才能使测试正常工作。但是我在beforeach()中调用它,所以当我添加第二个测试时,它会抱怨我多次调用TestBed.initTestEnvironment(但实际上我调用了三次)。您可以在调用initEnvironment之前调用TestBed.resetEnvironment
。这可能会奏效。@peeskillet,行得通!非常感谢。