问题
My Karma cannont load angular 2 component. Drop this error:
[web-server] :404 : /base/src/client/app/container/container.component
i do everything with angular 2 testing tutorial (i only modified path in karma) So problem must be in path. but i don't have any idea how to fix it.
My Path:
src
| |client
| | |container
| | | |container.component.ts
| | | |container.component.spec.ts
|karma.conf.js
|karma-test-shim.js
container.component.ts
import { Component, OnInit } from '@angular/core';
import { UserService } from '../user/user.service';
import { User } from '../user/user';
//import { FacebookLogin } from '../facebook/fb-login';
//import { Facebook } from '../facebook/facebook';
@Component({
selector: 'app-container',
//templateUrl: '../../views/content.html',
template: `Hello World`,
providers: [UserService]
})
export class ContainerComponent implements OnInit{
user: User;
// constructor(private userService: UserService) {
// this.loadUser();
// if(typeof FB == 'undefined') {console.log("NULL");}
// }
// loadUser() {
// this.userService.getMockUser().then(userData =>
// {
// this.user = userData
// console.log("User data: " + userData.email);
// });
// }
ngOnInit(){
}
}
container.component.spec.ts
import { ComponentFixture, TestBed, async } from '@angular/core/testing';
import { By } from '@angular/platform-browser';
import { DebugElement } from '@angular/core';
import { ContainerComponent } from './container.component';
let comp: ContainerComponent;
let fixture: ComponentFixture<ContainerComponent>;
let de: DebugElement;
let el: HTMLElement;
describe('Container Component', () => {
// beforeEach( async(() => {
// TestBed.configureTestingModule({
// declarations: [ContainerComponent],
// }).compileComponents();
// fixture = TestBed.createComponent(ContainerComponent);
// comp = fixture.componentInstance;
// }));
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [ContainerComponent], // declare the test component
});
});
});
karma.conf.js
// #docregion
module.exports = function(config) {
var appBase = 'src/client/app/'; // transpiled app JS and map files
var appSrcBase = 'src/client/app/'; // app source TS files
var appAssets = '/base/app/'; // component assets fetched by Angular's compiler
var testBase = 'testing/'; // transpiled test JS and map files
var testSrcBase = 'testing/'; // test source TS files
config.set({
basePath: '',
frameworks: ['jasmine'],
plugins: [
require('karma-jasmine'),
require('karma-chrome-launcher'),
require('karma-jasmine-html-reporter'), // click "Debug" in browser to see it
require('karma-htmlfile-reporter') // crashing w/ strange socket error
],
customLaunchers: {
// From the CLI. Not used here but interesting
// chrome setup for travis CI using chromium
Chrome_travis_ci: {
base: 'Chrome',
flags: ['--no-sandbox']
}
},
files: [
// System.js for module loading
'node_modules/systemjs/dist/system.src.js',
// Polyfills
'node_modules/core-js/client/shim.js',
'node_modules/reflect-metadata/Reflect.js',
// zone.js
'node_modules/zone.js/dist/zone.js',
'node_modules/zone.js/dist/long-stack-trace-zone.js',
'node_modules/zone.js/dist/proxy.js',
'node_modules/zone.js/dist/sync-test.js',
'node_modules/zone.js/dist/jasmine-patch.js',
'node_modules/zone.js/dist/async-test.js',
'node_modules/zone.js/dist/fake-async-test.js',
// RxJs
{ pattern: 'node_modules/rxjs/**/*.js', included: false, watched: false },
{ pattern: 'node_modules/rxjs/**/*.js.map', included: false, watched: false },
// Paths loaded via module imports:
// Angular itself
{pattern: 'node_modules/@angular/**/*.js', included: false, watched: false},
{pattern: 'node_modules/@angular/**/*.js.map', included: false, watched: false},
{pattern: 'systemjs.config.js', included: false, watched: false},
{pattern: 'systemjs.config.extras.js', included: false, watched: false},
'karma-test-shim.js',
// transpiled application & spec code paths loaded via module imports
{pattern: appBase + '**/*.js', included: false, watched: true},
{pattern: testBase + '**/*.js', included: false, watched: true},
// Asset (HTML & CSS) paths loaded via Angular's component compiler
// (these paths need to be rewritten, see proxies section)
{pattern: appBase + '**/*.html', included: false, watched: true},
{pattern: appBase + '**/*.css', included: false, watched: true},
// Paths for debugging with source maps in dev tools
{pattern: appSrcBase + '**/*.ts', included: false, watched: false},
{pattern: appBase + '**/*.js.map', included: false, watched: false},
{pattern: testSrcBase + '**/*.ts', included: false, watched: false},
{pattern: testBase + '**/*.js.map', included: false, watched: false}
],
// Proxied base paths for loading assets
proxies: {
// required for component assets fetched by Angular's compiler
"/app/": appAssets
},
exclude: [],
preprocessors: {},
// disabled HtmlReporter; suddenly crashing w/ strange socket error
reporters: ['progress', 'kjhtml'],//'html'],
// HtmlReporter configuration
htmlReporter: {
// Open this file to see results in browser
outputFile: '_test-output/tests.html',
// Optional
pageTitle: 'Unit Tests',
subPageTitle: __dirname
},
port: 9876,
colors: true,
logLevel: config.LOG_INFO,
autoWatch: true,
browsers: ['Chrome'],
singleRun: false
})
}
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/src/client/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 the optional "systemjs.config.extras.js". Did you omit it by accident? 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];
coreTesting.TestBed.initTestEnvironment(
browserTesting.BrowserDynamicTestingModule,
browserTesting.platformBrowserDynamicTesting());
})
}
// 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);
}
回答1:
I recently came across this same issue and I came to the conclusion that SystemJS is responsible for default extensions (should be 'js'). Make sure that your ng2 app folder is properly connected with your systemjs.config file.
(function (global) {
System.config({
paths: {
// paths serve as alias
'npm:': 'node_modules/'
},
// map tells the System loader where to look for things
map: {
// app is within the app folder
app: 'app', <<<<<<<------ HERE
'@angular/core': 'npm:@angular/core/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
'@angular/http': 'npm:@angular/http/bundles/http.umd.js',
'@angular/router': 'npm:@angular/router/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
'@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js',
// other libraries
'rxjs': 'npm:rxjs',
'angular-in-memory-web-api': 'npm:angular-in-memory-web-api'
},
packages: {
app: { <<<<<<<------ HERE
main: './main.js',
defaultExtension: 'js' <<<<<<----- Important!!
},
rxjs: {
defaultExtension: 'js'
},
'angular-in-memory-web-api': {
main: 'server/server.js',
defaultExtension: 'js'
}
}
});
})(this);
If this is correct and it is still having issues than it's probably an inconsistency in how your karma web-server and your node server serve your client files. You can add a proxy in your karma.conf file...
proxies: {
// required for component assets fetched by Angular's compiler
"/app/": "/base/client/app/"
},
Hope this helps! c:
来源：https://stackoverflow.com/questions/39903760/karma-cannot-load-angular-2-component