feat: v1 API + frontend migration

frontend/src/auth/authHelpers.test.ts

@@ -0,0 +1,157 @@
+import { describe, expect, it } from 'vitest';
+import {
+  getCheckingAuthState,
+  getUnauthenticatedAuthState,
+  normalizeAuthenticatedUser,
+  resolveAuthStateFromMe,
+  validateAuthMutationResponse,
+  type AuthState,
+} from './authHelpers';
+
+const previousState: AuthState = {
+  isAuthenticated: false,
+  user: null,
+  isCheckingAuth: true,
+};
+
+describe('authHelpers', () => {
+  it('normalizes a valid authenticated user payload', () => {
+    expect(normalizeAuthenticatedUser({ username: 'evan', is_admin: true })).toEqual({
+      username: 'evan',
+      is_admin: true,
+    });
+  });
+
+  it('rejects invalid authenticated user payloads', () => {
+    expect(normalizeAuthenticatedUser(null)).toBeNull();
+    expect(normalizeAuthenticatedUser({ username: 'evan' })).toBeNull();
+    expect(normalizeAuthenticatedUser({ username: 123, is_admin: true })).toBeNull();
+    expect(normalizeAuthenticatedUser({ username: 'evan', is_admin: 'yes' })).toBeNull();
+  });
+
+  it('returns a checking state while preserving previous auth information', () => {
+    expect(
+      getCheckingAuthState({
+        isAuthenticated: true,
+        user: { username: 'evan', is_admin: false },
+        isCheckingAuth: false,
+      })
+    ).toEqual({
+      isAuthenticated: true,
+      user: { username: 'evan', is_admin: false },
+      isCheckingAuth: true,
+    });
+  });
+
+  it('resolves auth state from a successful /auth/me response', () => {
+    expect(
+      resolveAuthStateFromMe({
+        meData: {
+          status: 200,
+          data: { username: 'evan', is_admin: false },
+        },
+        meError: undefined,
+        meLoading: false,
+        previousState,
+      })
+    ).toEqual({
+      isAuthenticated: true,
+      user: { username: 'evan', is_admin: false },
+      isCheckingAuth: false,
+    });
+  });
+
+  it('resolves auth state to unauthenticated on 401 or query error', () => {
+    expect(
+      resolveAuthStateFromMe({
+        meData: {
+          status: 401,
+        },
+        meError: undefined,
+        meLoading: false,
+        previousState,
+      })
+    ).toEqual(getUnauthenticatedAuthState());
+
+    expect(
+      resolveAuthStateFromMe({
+        meData: undefined,
+        meError: new Error('failed'),
+        meLoading: false,
+        previousState,
+      })
+    ).toEqual(getUnauthenticatedAuthState());
+  });
+
+  it('keeps checking state while /auth/me is still loading', () => {
+    expect(
+      resolveAuthStateFromMe({
+        meData: undefined,
+        meError: undefined,
+        meLoading: true,
+        previousState: {
+          isAuthenticated: true,
+          user: { username: 'evan', is_admin: true },
+          isCheckingAuth: false,
+        },
+      })
+    ).toEqual({
+      isAuthenticated: true,
+      user: { username: 'evan', is_admin: true },
+      isCheckingAuth: true,
+    });
+  });
+
+  it('returns the previous state with checking disabled when there is no decisive me result', () => {
+    expect(
+      resolveAuthStateFromMe({
+        meData: {
+          status: 204,
+        },
+        meError: undefined,
+        meLoading: false,
+        previousState: {
+          isAuthenticated: false,
+          user: null,
+          isCheckingAuth: true,
+        },
+      })
+    ).toEqual({
+      isAuthenticated: false,
+      user: null,
+      isCheckingAuth: false,
+    });
+  });
+
+  it('validates auth mutation responses by expected status and payload shape', () => {
+    expect(
+      validateAuthMutationResponse(
+        {
+          status: 200,
+          data: { username: 'evan', is_admin: false },
+        },
+        200
+      )
+    ).toEqual({ username: 'evan', is_admin: false });
+
+    expect(
+      validateAuthMutationResponse(
+        {
+          status: 201,
+          data: { username: 'evan', is_admin: false },
+        },
+        200
+      )
+    ).toBeNull();
+
+    expect(
+      validateAuthMutationResponse(
+        {
+          status: 200,
+          data: { username: 'evan' },
+        },
+        200
+      )
+    ).toBeNull();
+  });
+});