Question

我刚刚将应用程序模块迁移为可导入库。

我正尝试使测试正常工作，就像以前一样，但是出现此错误：

Error: Can't resolve all parameters for ApplicationModule: (?).
at syntaxError (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:1275:17)
at CompileMetadataResolver._getDependenciesMetadata (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:11176:35)
at CompileMetadataResolver._getTypeMetadata (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:11069:26)
at CompileMetadataResolver.getNgModuleMetadata (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:10937:24)
at CompileMetadataResolver.getNgModuleSummary (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:10747:35)
at eval (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:10861:51)
at Array.forEach (<anonymous>)
at CompileMetadataResolver.getNgModuleMetadata (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:10849:49)
at CompileMetadataResolver.getNgModuleSummary (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:10747:35)
at eval (webpack:///C:/Repositories/MyProject/my-library/node_modules/@angular/compiler/fesm5/compiler.js?:10861:51)

我已经看到了以下可能的解决方案： Error: Can't resolve all parameters for ApplicationModule: (?)和Cannot resolve parameters for ApplicationModule: (?)，但它们不能解决我的问题。

projects / my-library / src / test.ts

// This file is required by karma.conf.js and loads recursively all the .spec and framework files

import { getTestBed } from '@angular/core/testing';
import {
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting
} from '@angular/platform-browser-dynamic/testing';
import 'core-js/es7/reflect';
import 'zone.js/dist/zone';
import 'zone.js/dist/zone-testing';

declare const require: any;

// First, initialize the Angular testing environment.
getTestBed().initTestEnvironment(
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting()
);
// Then we find all the tests.
const context = require.context('./', true, /\.spec\.ts$/);
// And load the modules.
context.keys().map(context);

让我知道您是否需要更多信息来找出问题所在。

Answer 1

最后，我找到了问题所在，但很难找到它，因为它不相关。问题来自此tslint配置：

tslint.json ：

...
"ordered-imports" [
  true,
  { "named-imports-order": "lowercase-last" }
]
...

即使配置仅为"ordered-imports": true，在启动test.ts时，也会在ng lint文件中引起问题，所以我更改了该文件以满足tslint要求：

test.ts ：

// This file is required by karma.conf.js and loads recursively all the .spec and framework files

import { getTestBed } from '@angular/core/testing';
import {
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting
} from '@angular/platform-browser-dynamic/testing';
import 'core-js/es7/reflect'; // <-- Moved from the top of imports
import 'zone.js/dist/zone'; // <-- Moved from the top of imports
import 'zone.js/dist/zone-testing'; // <-- Moved from the top of imports

declare const require: any;

// First, initialize the Angular testing environment.
getTestBed().initTestEnvironment(
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting()
);
// Then we find all the tests.
const context = require.context('./', true, /\.spec\.ts$/);
// And load the modules.
context.keys().map(context);

此文件导致了我得到的错误。该文件必须如下所示：

更正 test.ts ：

import 'core-js/es7/reflect';
import 'zone.js/dist/zone';
import 'zone.js/dist/zone-testing';
import { getTestBed } from '@angular/core/testing';
import {
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting
} from '@angular/platform-browser-dynamic/testing';

declare const require: any;

// First, initialize the Angular testing environment.
getTestBed().initTestEnvironment(
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting()
);
// Then we find all the tests.
const context = require.context('./', true, /\.spec\.ts$/);
// And load the modules.
context.keys().map(context);

Answer 2

您的应用程序模块中有一个依赖项，您没有以任何方式提供或导入。您可以通过查看您的ApplicationModule构造函数方法来确定哪个方法-它可能注入了某些服务或类似的服务，并且您没有在imports元数据的NgModule数组中提供该服务。

Answer 3

将此添加到polifills.ts文件中

Layer

Answer 4

对于Angle 7及更高版本，请尝试添加polyfill.ts文件：

reddit.submission(id=LoadedPosts.pop(0))

无法解析ApplicationModule的所有参数：（？）

4 个答案: