Add tests for main menu service (#2830)

client/src/app/site/pages/meetings/services/main-menu.service.spec.ts

@@ -1,16 +1,54 @@
 import { TestBed } from '@angular/core/testing';
+import { firstValueFrom, skip } from 'rxjs';
 
-import { MainMenuService } from './main-menu.service';
+import { MainMenuEntry, MainMenuService } from './main-menu.service';
 
-xdescribe(`MainMenuService`, () => {
+const menuEntries: MainMenuEntry[] = [
+    { route: `page1`, displayName: `A page`, icon: `add`, weight: 300 },
+    { route: `start`, displayName: `Start page`, icon: `start`, weight: 100 },
+    { route: `page2`, displayName: `Another page`, icon: `search`, weight: 200 }
+];
+
+function getNumberOfTogglesPromise(service: MainMenuService, requiredToggleNumber: number): Promise<void> {
+    return firstValueFrom(service.toggleMenuSubject.pipe(skip(requiredToggleNumber - 1)));
+}
+
+describe(`MainMenuService`, () => {
     let service: MainMenuService;
 
     beforeEach(() => {
-        TestBed.configureTestingModule({});
+        TestBed.configureTestingModule({
+            providers: [MainMenuService]
+        });
+
         service = TestBed.inject(MainMenuService);
     });
 
-    it(`should be created`, () => {
-        expect(service).toBeTruthy();
+    it(`test registerEntries method`, () => {
+        service.registerEntries([menuEntries[0]]);
+        expect(service.entries).toEqual([menuEntries[0]]);
+    });
+
+    it(`test registerEntries method with multiple entries at once`, () => {
+        service.registerEntries(menuEntries.slice(1));
+        expect(service.entries).toEqual(menuEntries.slice(1));
+    });
+
+    it(`test consecutive calls of registerEntries method`, () => {
+        service.registerEntries(menuEntries.slice(0, 2));
+        service.registerEntries([menuEntries[2]]);
+        expect(service.entries).toEqual(menuEntries.sort((a, b) => a.weight - b.weight));
     });
+
+    for (let i = 1; i <= 5; i++) {
+        it(`test toggleSubject with ${i} call(s)`, async () => {
+            const promise1 = getNumberOfTogglesPromise(service, i);
+            const promise2 = getNumberOfTogglesPromise(service, i + 1);
+            for (let j = 0; j < i; j++) {
+                service.toggleMenu();
+            }
+            await expectAsync(promise1).toBeResolved();
+            await expectAsync(promise2).toBePending();
+        });
+    }
 });