Initial

tests/unit/authStore.test.ts

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+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+vi.mock('$api', () => {
+	const state = { authed: false, username: 'demo' };
+	return {
+		setUnauthorizedHandler: vi.fn(),
+		authApi: {
+			session: vi.fn(async () => ({ isAuthenticated: state.authed })),
+			whoami: vi.fn(async () => ({ username: state.username, is_staff: false })),
+			login: vi.fn(async () => {
+				state.authed = true;
+				state.username = 'demo';
+				return { detail: 'ok' };
+			}),
+			logout: vi.fn(async () => {
+				state.authed = false;
+				state.username = 'demo';
+			}),
+			register: vi.fn(async (u: string) => {
+				state.authed = true;
+				state.username = u;
+				return { detail: 'ok' };
+			})
+		}
+	};
+});
+vi.mock('$app/navigation', () => ({ goto: vi.fn() }));
+
+import { get } from 'svelte/store';
+import { authStore } from '$auth';
+
+beforeEach(() => authStore.logout());
+
+describe('authStore', () => {
+	it('starts unknown then resolves anonymous', async () => {
+		const s = await authStore.refresh();
+		expect(s.status).toBe('anonymous');
+		expect(get(authStore).username).toBeNull();
+	});
+
+	it('becomes authenticated after login', async () => {
+		await authStore.login('demo', 'demo');
+		const s = get(authStore);
+		expect(s.status).toBe('authenticated');
+		expect(s.username).toBe('demo');
+		expect(s.isStaff).toBe(false);
+	});
+
+	it('registers, auto-logs-in, and exposes the new username', async () => {
+		await authStore.register('newbie', 'newbie@example.com', 's3curePass!');
+		const s = get(authStore);
+		expect(s.status).toBe('authenticated');
+		expect(s.username).toBe('newbie');
+	});
+});