test user login and create fake user repo

tests/Fakes/User/FakeUserRepository.php

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+<?php
+
+namespace Tests\Fakes\User;
+
+use FreightQuote\User\User;
+use FreightQuote\User\UserRepository;
+
+class FakeUserRepository implements UserRepository
+{
+    /**
+     * @var User[] $existingUsers
+     */
+    private array $existingUsers = [];
+
+    public function findByEmail(string $email): ?User
+    {
+        foreach ($this->existingUsers as $user) {
+            if ($user->getEmail() === $email) {
+                return new User(
+                    $user->getEmail(),
+                    $user->getPassword()
+                );
+            }
+        }
+
+        return null;
+    }
+
+    public function save(User $user): User
+    {
+        $this->existingUsers[$user->getEmail()] = $user;
+
+        return new User($user->getEmail(), $user->getPassword());
+    }
+}

tests/Unit/User/UseCases/LoginUserTest.php

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+<?php
+
+namespace Tests\Unit\User\UseCases;
+
+use PHPUnit\Framework\TestCase;
+use FreightQuote\User\User;
+use FreightQuote\User\UseCases\LoginUser;
+use FreightQuote\User\UseCases\LoginUserRequest;
+use Tests\Fakes\User\FakeUserRepository;
+
+class LoginUserTest extends TestCase
+{
+    public function test_login(): void
+    {
+        $email = 'test@test.com';
+        $password = password_hash('testPassword', PASSWORD_DEFAULT);
+        $user = new User($email, $password);
+        $userRepo = new FakeUserRepository();
+        $userRepo->save($user);
+        $dto = new LoginUserRequest($email, 'testPassword');
+        $useCase = new LoginUser($dto, $userRepo);
+        $response = $useCase->execute();
+        $this->assertTrue($response);
+    }
+
+    public function test_non_existing_user_login_fails(): void
+    {
+        $email = 'test@test.com';
+        $password = 'testPassword';
+        $dto = new LoginUserRequest($email, $password);
+        $userRepo = new FakeUserRepository();
+        $useCase = new LoginUser($dto, $userRepo);
+        $response = $useCase->execute();
+        $this->assertFalse($response);
+    }
+
+    public function test_wrong_password_fails(): void
+    {
+        $email = 'test@test.com';
+        $password = 'testPassword';
+        $user = new User($email, $password);
+        $userRepo = new FakeUserRepository();
+        $userRepo->save($user);
+        $dto = new LoginUserRequest($email, 'wrongPassword');
+        $useCase = new LoginUser($dto, $userRepo);
+        $response = $useCase->execute();
+        $this->assertFalse($response);
+    }
+}