test(auth): add xUnit tests for Authenticate endpoint (400)

Author: HasanJaved-Developer

UserManagementApi.Tests.Unit/LoginControllerTests.cs

@@ -0,0 +1,54 @@
+using FluentAssertions;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Options;
+using Moq;
+using UserManagementApi.Data;
+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
+    {
+        private static AppDbContext NewDb(string name)
+        {
+            var opts = new DbContextOptionsBuilder<AppDbContext>()
+                .UseInMemoryDatabase(name)
+                .Options;
+            return new AppDbContext(opts);
+        }
+
+        [Fact]
+        public async Task Authenticate_WhenMissingUsernameOrPassword_Returns400WithValidationProblem()
+        {
+            using var db = NewDb(nameof(Authenticate_WhenMissingUsernameOrPassword_Returns400WithValidationProblem));
+            var jwtOptions = new JwtOptions
+            {
+                Issuer = "test-issuer",
+                Audience = "test-audience",
+                Key = "supersecretkey1234567890"
+            };
+            var wrapped = Options.Create(jwtOptions); // returns IOptions<JwtOptions>
+
+            var controller = new TestableLoginController(db, wrapped);
+
+            var res = await controller.Authenticate(new LoginRequest("", ""));
+
+            var bad = res.Result.Should().BeOfType<BadRequestObjectResult>().Which;
+            bad.StatusCode.Should().Be(StatusCodes.Status400BadRequest);
+            bad.Value.Should().BeOfType<ValidationProblemDetails>();
+            var v = (ValidationProblemDetails)bad.Value!;
+            v.Errors.Should().ContainKey("userName");
+            v.Errors.Should().ContainKey("password");
+        }
+    }
+}

UserManagementApi.Tests.Unit/TestableLoginController.cs

@@ -0,0 +1,39 @@
+using Microsoft.Extensions.Options;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UserManagementApi.Contracts.Models;
+using UserManagementApi.Controllers;
+using UserManagementApi.Data;
+using UserManagementApi.DTO;
+using UserManagementApi.DTO.Auth;
+
+namespace UserManagementApi.Tests.Unit
+{
+    public sealed class TestableLoginController :UsersController
+    {
+        private readonly string _jwtToReturn;
+        private readonly DateTime _expToReturn;
+        private readonly UserPermissionsDto _permToReturn;
+
+        public TestableLoginController(AppDbContext db,
+                                       IOptions<JwtOptions> jwtopts)
+            : base(db, jwtopts)
+        {
+            _jwtToReturn = "fake-jwt";
+            _expToReturn = DateTime.UtcNow.AddHours(1);
+            _permToReturn = new UserPermissionsDto(0, "abc", new List<CategoryDto>());
+
+        }
+        protected override Task<UserPermissionsDto> BuildPermissionsForUser(int userId)
+            => Task.FromResult(_permToReturn);
+
+        protected override string GenerateJwt(AppUser user, List<CategoryDto> Categories, out DateTime expiresAtUtc)
+        {
+            expiresAtUtc = _expToReturn;
+            return _jwtToReturn;
+        }
+    }
+}

UserManagementApi.Tests.Unit/UserManagementApi.Tests.Unit.csproj

@@ -0,0 +1,29 @@
+<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.EntityFrameworkCore.InMemory" Version="9.0.9" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\UserManagement.Contracts\UserManagement.Contracts.csproj" />
+    <ProjectReference Include="..\UserManagementApi\UserManagementApi.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+</Project>