Issues during testing

[VamsiDevalla]

Versions (please complete the following information):

• NgxWebstorage: [e.g. 4.0.1]
• Angular: [e.g. 8.2.14]

Describe the bug
I have updated my application to angular 8 from 5. Everything is good from the application side but the unit tests are failing saying Can't resolve all parameters for LocalStorageService: (?). at syntaxError (http://localhost:9876/_karma_webpack_/node_modules/@angular/compiler/fesm2015/compiler.js:2175:1).

My test file looks like this:
`import { TestBed, inject} from '@angular/core/testing';
import { LocalStorageService} from 'ngx-webstorage';
import { ThemeService } from './theme.service';
import { HttpTestingController, HttpClientTestingModule } from '@angular/common/http/testing';

const currentUser = require('../../../assets/data/currentUser.json');
describe('ThemeService', () => {
let httpMock: HttpTestingController;
let storage: LocalStorageService;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [
HttpClientTestingModule,
],
providers: [
LocalStorageService,
ThemeService
]
});
storage = TestBed.get(LocalStorageService);
httpMock = TestBed.get(HttpTestingController);
});

beforeEach(() => {
storage.store('currentuser', currentUser);
});

it('should be created', inject([ThemeService], (service: ThemeService) => {
expect(service).toBeTruthy();
}));
});`

To Reproduce
Steps to reproduce the behavior:

1. Write a test file 'using localStorageService'
2. Run the tests
3. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[rolfed]

I'm running into the same issue. Is there a solution to this problem?

[neilgrewal]

Any updates on this? Running into the issue with SessionStorageService

[lePhilissimo]

I was able to get around this by:

1. creating a mock object that implements the StorageService interface.
2. configuring my provider to use the mocked object.
   Definitely not an ideal long term solution, but it got the tests passing again.

// Mock LocalStorageService
const mockStore = {};
const localStorageMock: StorageService = {
store: (key: string, value: string) => {
mockStore[key] = ${value};
},
retrieve: (key: string): string => {
return key in mockStore ? mockStore[key] : null;
},
clear: (key: string) => {
delete mockStore[key];
},
getStrategyName(): string {
return 'Local';
},
observe(key: string): Observable {
return EMPTY;
}
};

And then

beforeEach(() => {
TestBed.configureTestingModule({
providers: [
{provide: LocalStorageService, useValue: localStorageMock}
],
}); ....