Below is the unit test I've written for my Angular 10 component, which showcases a tree view with interactive features:
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { ReactiveFormsModule } from '@angular/forms';
// import { MatFormFieldModule } from '@angular/material/form-field';
// import { MatInputModule } from '@angular/material/input';
import { MatProgressBarModule } from '@angular/material/progress-bar';
import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
import { BrowserModule } from '@angular/platform-browser';
import { TreeviewModule } from 'ngx-treeview';
import { DocumentTreeService } from '../services/DocumentTreeService';
import { DocumentTreeviewComponent } from './document-treeview.component';
describe('DocumentTreeviewComponent', () => {
let component: DocumentTreeviewComponent;
let fixture: ComponentFixture<DocumentTreeviewComponent>;
beforeEach(async () => {
await TestBed.configureTestingModule({
declarations: [ DocumentTreeviewComponent ],
imports: [ TreeviewModule.forRoot(), ReactiveFormsModule, MatProgressBarModule,
BrowserModule, MatProgressSpinnerModule, /* MatFormFieldModule, MatInputModule */ ],
providers: [ DocumentTreeService ]
})
.compileComponents();
});
beforeEach(() => {
fixture = TestBed.createComponent(DocumentTreeviewComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
This is my DocumentTreeService.ts file:
import { HttpClient } from '@angular/common/http';
import { TreeviewItem } from 'ngx-treeview';
import { GlobalDataService } from './global-data.service';
interface TreeItem {
name?: string;
text: string;
value: any;
children?: String[];
type: 'folder' | 'document';
}
/* tslint:disable no-string-literal prefer-for-of */
export class DocumentTreeService {
constructor(public http: HttpClient, public DataService: GlobalDataService){}
public treeviewmtextresponse;
public docNames = [];
public FolderItems = [];
public treeviewItem = [];
public finalTreeviewElements: TreeviewItem[] = [];
getDocItems(): TreeviewItem[] {
// implementation details
}
}
I am encountering the following error message:
Error: Can't resolve all parameters for DocumentTreeService: (?, ?).
Even after verifying service placement and logic, the issue persists. What could be causing this problem?
Update 1
The codebase now includes:
beforeEach(async () => {
const httpSpy = jasmine.createSpyObj('HttpClient', ['get']);
const dataSpy = jasmine.createSpyObj('GlobalDataService', ['funcName']);
await TestBed.configureTestingModule({
declarations: [ DocumentTreeviewComponent ],
imports: [ TreeviewModule.forRoot(), ReactiveFormsModule, MatProgressBarModule,
BrowserModule, MatProgressSpinnerModule, HttpClientTestingModule, MatDialogModule, MatInputModule
/* MatFormFieldModule, MatInputModule */ ],
providers: [ GlobalDataService, DatePipe,
{ provide: DocumentTreeService, useValue: mockDocumentTreeService },
{ provide: HttpClient, useValue: httpSpy },
{ provide: GlobalDataService, useValue: dataSpy }]
})
.compileComponents();
documentTreeService = TestBed.inject(DocumentTreeService);
});
Update 2
In document-treeview.component.ts:
import { Component, OnInit } from '@angular/core';
// remaining content remains unchanged