test(integration): add LoginFlow integration test for authenticate endpoint

Author: HasanJaved-Developer

CentralizedLoggingMonitoring.sln

@@ -19,6 +19,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CentralizedLogging.Contract
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UserManagementApi.Tests.Unit", "UserManagementApi.Tests.Unit\UserManagementApi.Tests.Unit.csproj", "{66616F9C-B71C-45BF-8962-BAA356215BE6}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UserManagementApi.Tests.Integration", "UserManagementApi.Tests.Integration\UserManagementApi.Tests.Integration.csproj", "{DB6B7B64-C22D-474B-87B1-E48016C8633B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -57,6 +59,10 @@ Global
 		{66616F9C-B71C-45BF-8962-BAA356215BE6}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{66616F9C-B71C-45BF-8962-BAA356215BE6}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{66616F9C-B71C-45BF-8962-BAA356215BE6}.Release|Any CPU.Build.0 = Release|Any CPU
+		{DB6B7B64-C22D-474B-87B1-E48016C8633B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DB6B7B64-C22D-474B-87B1-E48016C8633B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DB6B7B64-C22D-474B-87B1-E48016C8633B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DB6B7B64-C22D-474B-87B1-E48016C8633B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

UserManagementApi.Tests.Integration/LoginFlowTests.cs

@@ -0,0 +1,27 @@
+using FluentAssertions;
+using Microsoft.AspNetCore.Mvc.Testing;
+using System.Net;
+using System.Net.Http.Json;
+using UserManagement.Contracts.Auth;
+
+namespace UserManagementApi.Tests.Integration
+{
+    public class LoginFlowTests : IClassFixture<WebApplicationFactory<Program>>
+    {
+        private readonly HttpClient _client;
+        public LoginFlowTests(WebApplicationFactory<Program> factory)
+            => _client = factory.CreateClient();
+
+        [Fact]
+        public async Task Login_ValidCredentials_Returns200AndToken()
+        {
+            var payload = new LoginRequest("bob","bob");
+            var resp = await _client.PostAsJsonAsync("api/users/authenticate", payload);
+
+            resp.StatusCode.Should().Be(HttpStatusCode.OK);
+            var body = await resp.Content.ReadFromJsonAsync<AuthResponse>();
+            body.Should().NotBeNull();
+            body.Token.Should().NotBeNullOrEmpty();
+        }
+    }
+}

UserManagementApi.Tests.Integration/UserManagementApi.Tests.Integration.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
+    <PackageReference Include="FluentAssertions" Version="8.7.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.9" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\UserManagementApi\UserManagementApi.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+</Project>

UserManagementApi.Tests.Unit/LoginControllerTests.cs

@@ -8,13 +8,6 @@
 using UserManagementApi.DTO;
 using UserManagementApi.DTO.Auth;
 
-
-//using FluentAssertions;
-//using Microsoft.AspNetCore.Http;
-//using Microsoft.AspNetCore.Mvc;
-//using Microsoft.EntityFrameworkCore;
-using Xunit;
-
 namespace UserManagementApi.Tests.Unit
 {
     public class LoginControllerTests