I am having trouble in mocking ExecutionContext in Guard middleware.
Here's my RoleGuard extends JwtGuard
@Injectable()
export class RoleGuard extends JwtAuthGuard {
...
async canActivate(context: ExecutionContext): Promise<boolean> {
const request = context.switchToHttp().getRequest();
const params = request.params;
...
}
}
This is what I am trying on my unit test.
let context: ExecutionContext = jest.genMockFromModule('@nestjs/common');
context.switchToHttp = jest.fn().mockResolvedValue({
getRequest: () => ({
originalUrl: '/',
method: 'GET',
params: undefined,
query: undefined,
body: undefined,
}),
getResponse: () => ({
statusCode: 200,
}),
});
jest.spyOn(context.switchToHttp(), 'getRequest').mockImplementation(() => {
return Promise.resolve(null);
});
And I am getting this kind of error.
Cannot spy the getRequest property because it is not a function; undefined given instead
I would like you to suggest any other way to mock context. Thank you.
Please check this library https://www.npmjs.com/package/@golevelup/ts-jest
Then you could mock ExecutionContext as following.
import { createMock } from '@golevelup/ts-jest';
import { ExecutionContext } from '@nestjs/common';
describe('Mocked Execution Context', () => {
it('should have a fully mocked Execution Context', () => {
const mockExecutionContext = createMock<ExecutionContext>();
expect(mockExecutionContext.switchToHttp()).toBeDefined();
...
});
});
Hope it helps