Error when unit testing: “Uncaught (in promise) SyntaxError: Unexpected token o in JSON at position 1”

Question

I\'d like to unit test a service, however, when running the test, I get the following error:

Uncaught (in promise) SyntaxError: Unexpected token o in

Answer 1

As it turned out I missed the import for Response:

Before: import { BaseRequestOptions, Http, ResponseOptions } from '@angular/http';

After: import { BaseRequestOptions, Http, Response, ResponseOptions } from '@angular/http';

Without importing Response from @angular/http, Response defaults to ECMAScript APIs.