I am looking for assistance in achieving 100% code coverage with this code. Even just verifying if the function has been executed will suffice

I'm struggling to figure out how to access the remaining line of code in order to achieve full code coverage. I am specifically looking to check if the function has been called using "toHaveBeenCalled()".

Below are the TypeScript file and my Spec file along with the current code coverage report:

TOTAL: 2 FAILED, 3 SUCCESS

================== Coverage summary ==================

Statements : 30.34% (27/89)

Branches : 0% (0/22)

Functions : 26.92% (7/26)

Lines : 29.07% (25/86)

=====================================================

update-notification.component.ts

import { Component, OnInit } from '@angular/core';
import { FormGroup, FormControl, Validators } from '@angular/forms';
import * as ClassicEditor from '@ckeditor/ckeditor5-build-classic';
import { NotificationService } from '../notification.service';
import { ActivatedRoute, Router } from '@angular/router';
import { ToastrService } from 'ngx-toastr';

// Component code...

My test cases..

update-notificatoin.component.spec.ts

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { NO_ERRORS_SCHEMA } from '@angular/core';
import { NotificationService } from '../notification.service';
import { ActivatedRoute } from '@angular/router';
import { Router } from '@angular/router';
import { ToastrService } from 'ngx-toastr';
import { ClassicEditor } from '@ckeditor/ckeditor5-build-classic';
import { UpdateNotificationComponent } from './update-notification.component';

// Test cases...

https://i.sstatic.net/NZrkS.jpg

Answer №1

To handle error scenarios, it is necessary to intentionally make an observable fail. During testing, it is important to spy on the method being tested and return an error.

import {
  throwError
} from 'rxjs';

// Example test case

it('should simulate an error', () => {

  spyOn(
    notificationServiceStub,
    'getNotificationDetailsById'
  ).and.returnValue(throwError('YOUR ERROR DATA HERE'));

});

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