test(auth): add feature test for sign-up → sign-in → sign-out flow

packages/auth/tests/sign-in-flow.feature.test.ts

@@ -0,0 +1,52 @@
+// Feature-level test: sign-up, then sign-in with the new credentials, then sign-out.
+
+import { beforeEach, describe, expect, it } from "vitest";
+import { authContainer } from "../src/di/container";
+import { AUTH_SYMBOLS } from "../src/di/symbols";
+import { MockUsersRepository } from "../src/infrastructure/repositories/mock-users.repository";
+import { MockAuthenticationService } from "../src/infrastructure/services/mock-authentication.service";
+import type { IUsersRepository } from "../src/application/repositories/users-repository.interface";
+import type { IAuthenticationService } from "../src/application/services/authentication-service.interface";
+import { authRouter } from "../src/integrations/api/router";
+
+describe("auth feature: sign-up → sign-in → sign-out", () => {
+  beforeEach(() => {
+    if (authContainer.isBound(AUTH_SYMBOLS.IUsersRepository)) {
+      authContainer.unbind(AUTH_SYMBOLS.IUsersRepository);
+    }
+    if (authContainer.isBound(AUTH_SYMBOLS.IAuthenticationService)) {
+      authContainer.unbind(AUTH_SYMBOLS.IAuthenticationService);
+    }
+    const usersRepo = new MockUsersRepository();
+    const authService = new MockAuthenticationService(usersRepo);
+    authContainer
+      .bind<IUsersRepository>(AUTH_SYMBOLS.IUsersRepository)
+      .toConstantValue(usersRepo);
+    authContainer
+      .bind<IAuthenticationService>(AUTH_SYMBOLS.IAuthenticationService)
+      .toConstantValue(authService);
+  });
+
+  it("a new user can sign up, then sign in, then sign out", async () => {
+    const caller = authRouter.createCaller({});
+
+    const signUpResult = await caller.signUp({
+      username: "newperson",
+      password: "verysecret",
+      confirmPassword: "verysecret",
+    });
+    expect(signUpResult.user.username).toBe("newperson");
+    const userId = signUpResult.user.id;
+
+    const signInCookie = await caller.signIn({
+      username: "newperson",
+      password: "verysecret",
+    });
+    expect(signInCookie.value).toBe("session_" + userId);
+
+    const signOutResult = await caller.signOut({
+      sessionId: signInCookie.value,
+    });
+    expect(signOutResult.value).toBe("");
+  });
+});