How I can test a subscribe in Angular 11

I need helps about test in Angular. I have a method which in I use a subscribe, after lot of researchs I don’t found a solution thats corresponding to my situation,

my component

In this component I want to test ngOnInit

port { Component, OnInit } from '@angular/core';
import { ProjectEditionService } from '../../../project-view/services/project-edition.service';

@Component({
  selector: 'ngx-brush-width-popover',
  templateUrl: './brush-width-popover.component.html',
  styleUrls: ['./brush-width-popover.component.scss'],
})
export class BrushWidthPopoverComponent implements OnInit {
  private canvas: fabric.Canvas;
  public brushWidth: number = 1;

  public readonly MIN_WIDTH: number = 1;
  public readonly MAX_WIDTH: number = 100;
  public readonly STEP: number = 0.1;

  constructor(private projectEditionService: ProjectEditionService) {}

  ngOnInit(): void {
    this.projectEditionService.currentCanvas$.subscribe((canvas) => {
      this.canvas = canvas;
      this.brushWidth = this.canvas.freeDrawingBrush.width;
    });
  }

My spec file

import { ComponentFixture, fakeAsync, TestBed, waitForAsync } from '@angular/core/testing';
import { ProjectEditionService } from 'app/feature/project-view/services/project-edition.service';
import { fabric } from 'fabric';
import { of } from 'rxjs';
import { compileFunction } from 'vm';

import { BrushWidthPopoverComponent } from './brush-width-popover.component';
let canvas = new fabric.Canvas("canvas", {
  width: 1280,

});
fdescribe('BrushWidthPopoverComponent', () => {
  let component: BrushWidthPopoverComponent;
  let fixture: ComponentFixture<BrushWidthPopoverComponent>;
  let projectEditionService: ProjectEditionService;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      declarations: [BrushWidthPopoverComponent],
      providers: [
        ProjectEditionService,
        ],
    }).compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(BrushWidthPopoverComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
    projectEditionService = TestBed.inject(ProjectEditionService);
    component['canvas'] = { freeDrawingBrush: {} } as fabric.Canvas;
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });

  describe('ngOnInit', () => {
    it('onInit', () => {
        component.ngOnInit();
        expect(canvas).toBeDefined();
        expect(component.brushWidth).toEqual(1);
        expect(canvas.freeDrawingBrush.width).toEqual(1);
        expect(component.brushWidth).toEqual(canvas.freeDrawingBrush.width);
        });
      });

My test pass but am not sure if it’s test correctly my method ngOnInit because I don’t use projectEditionservice in my test.
thnks if you can help me to find a good solution