test: add unit tests for getDisplayName

frontend/src/models/user.test.ts

@@ -0,0 +1,32 @@
+import {describe, it, expect} from 'vitest'
+import {getDisplayName} from './user'
+import type {IUser} from '@/modelTypes/IUser'
+
+function makeUser(overrides: Partial<IUser> = {}): IUser {
+	return {
+		id: 1,
+		email: 'test@example.com',
+		username: 'testuser',
+		name: '',
+		exp: 0,
+		type: 1,
+		created: new Date(),
+		updated: new Date(),
+		settings: {} as IUser['settings'],
+		isLocalUser: true,
+		deletionScheduledAt: null,
+		...overrides,
+	}
+}
+
+describe('getDisplayName', () => {
+	it('should return the name when set', () => {
+		const user = makeUser({name: 'Jane Doe'})
+		expect(getDisplayName(user)).toBe('Jane Doe')
+	})
+
+	it('should fall back to username when name is empty', () => {
+		const user = makeUser({name: '', username: 'janedoe'})
+		expect(getDisplayName(user)).toBe('janedoe')
+	})
+})