August 14, 2017
Angular HTTP Testing “SyntaxError: Unexpected token o in JSON at position 1”
tl:dr; Solve this Issue: Add the following line to your imports:
| 1 | import { Response } from '@angular/http'; | 
   Full version: A common problem affecting many developers when writing tests for the Angular 4 HTTP service is the following stack trace. It occurs if you assemble an response using a the wrong class. The call of .json()will throw the error. 
| 1 | "Unexpected token o in JSON at position 1" | 
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