feat: implement esting suite using Vitest and add to ci

frontend/test/mocks/server.ts

@@ -0,0 +1,34 @@
+import { HttpResponse, http } from "msw";
+import { setupServer } from "msw/node";
+import { mockUser } from "../fixtures/user.fixture";
+
+const apiServerHost = "http://piku-server";
+
+export const successHandlers = [
+  http.post(`http://${apiServerHost}/api/auth/login/`, () =>
+    HttpResponse.json({ access: "mock-access-token" }),
+  ),
+  http.post(`http://${apiServerHost}/api/auth/refresh/`, () =>
+    HttpResponse.json({ access: "new-access-token" }),
+  ),
+  http.get(`http://${apiServerHost}/api/auth/me/`, () =>
+    HttpResponse.json(mockUser),
+  ),
+  http.post(`http://${apiServerHost}/api/auth/logout/`, () =>
+    HttpResponse.json({}),
+  ),
+];
+
+export const errorHandlers = [
+  http.post(`http://${apiServerHost}/api/auth/login/`, () =>
+    HttpResponse.json({ error: "Invalid credentials" }, { status: 400 }),
+  ),
+  http.post(`http://${apiServerHost}/api/auth/refresh/`, () =>
+    HttpResponse.json({ error: "Invalid Token" }, { status: 401 }),
+  ),
+  http.get(`http://${apiServerHost}/api/auth/me/`, () =>
+    HttpResponse.json({ error: "Invalid Token" }, { status: 401 }),
+  ),
+];
+
+export const server = setupServer(...successHandlers);