LoginCommandHandler unit test.

Author: omid-ahmadpour

test/CleanTemplate.CommandHandler.Test/LoginCommandHandlerTest.cs

@@ -0,0 +1,37 @@
+using CleanTemplate.Common.Exceptions;
+using CleanTemplate.Domain.Entities.Users;
+using CleanTemplate.Persistance.CommandHandlers.Users;
+using CleanTemplate.Persistance.Jwt;
+using Microsoft.AspNetCore.Identity;
+using Moq;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace CleanTemplate.CommandHandler.Test
+{
+    public class LoginCommandHandlerTest
+    {
+        [Fact]
+        public async Task Should_ThrowException_When_InputIsNull()
+        {
+            // Arrange
+            var userStore = new Mock<IUserStore<User>>();
+            userStore.Setup(x => x.FindByIdAsync("123", CancellationToken.None))
+                .ReturnsAsync(new User()
+                {
+                    UserName = "testUserName",
+                    Id = 123
+                });
+
+            var userManager = new UserManager<User>(userStore.Object, null, null, null, null, null, null, null, null);
+            var jwtService = new Mock<IJwtService>();
+
+            // Act
+            var commandHandler = new LoginCommandHandler(userManager, jwtService.Object);
+
+            // Assert
+            await Assert.ThrowsAsync<InvalidNullInputException>(() => commandHandler.Handle(null, CancellationToken.None));
+        }
+    }
+}