1 files changed, 314 insertions, 0 deletions
diff --git a/src/Services/DevHive.Services.Tests/CommentService.Tests.cs b/src/Services/DevHive.Services.Tests/CommentService.Tests.cs
new file mode 100644
index 0000000..12229e8
--- /dev/null
+++ b/src/Services/DevHive.Services.Tests/CommentService.Tests.cs
@@ -0,0 +1,314 @@
+using System;
+using System.Threading.Tasks;
+using AutoMapper;
+using DevHive.Data.Interfaces;
+using DevHive.Data.Models;
+using DevHive.Services.Models.Comment;
+using DevHive.Services.Services;
+using Moq;
+using NUnit.Framework;
+
+namespace DevHive.Services.Tests
+{
+	[TestFixture]
+	public class CommentServiceTests
+	{
+		private const string MESSAGE = "Gosho Trapov";
+		private Mock<IUserRepository> _userRepositoryMock;
+		private Mock<IPostRepository> _postRepositoryMock;
+		private Mock<ICommentRepository> _commentRepositoryMock;
+		private Mock<IMapper> _mapperMock;
+		private CommentService _commentService;
+
+		#region Setup
+		[SetUp]
+		public void Setup()
+		{
+			this._userRepositoryMock = new Mock<IUserRepository>();
+			this._postRepositoryMock = new Mock<IPostRepository>();
+			this._commentRepositoryMock = new Mock<ICommentRepository>();
+			this._mapperMock = new Mock<IMapper>();
+			this._commentService = new CommentService(this._userRepositoryMock.Object, this._postRepositoryMock.Object, this._commentRepositoryMock.Object, this._mapperMock.Object);
+		}
+		#endregion
+
+		#region AddComment
+		[Test]
+		public async Task AddComment_ReturnsNonEmptyGuid_WhenEntityIsAddedSuccessfully()
+		{
+			Guid id = Guid.NewGuid();
+			User creator = new() { Id = Guid.NewGuid() };
+			CreateCommentServiceModel createCommentServiceModel = new()
+			{
+				Message = MESSAGE
+			};
+			Comment comment = new()
+			{
+				Message = MESSAGE,
+				Id = id,
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.AddAsync(It.IsAny<Comment>()))
+				.ReturnsAsync(true);
+			this._commentRepositoryMock
+				.Setup(p => p.GetCommentByIssuerAndTimeCreatedAsync(It.IsAny<Guid>(), It.IsAny<DateTime>()))
+				.ReturnsAsync(comment);
+			this._postRepositoryMock
+				.Setup(p => p.DoesPostExist(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._userRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(creator);
+			this._mapperMock
+				.Setup(p => p.Map<Comment>(It.IsAny<CreateCommentServiceModel>()))
+				.Returns(comment);
+
+			Guid result = await this._commentService.AddComment(createCommentServiceModel);
+
+			Assert.AreEqual(id, result);
+		}
+
+		[Test]
+		public async Task AddComment_ReturnsEmptyGuid_WhenEntityIsNotAddedSuccessfully()
+		{
+			CreateCommentServiceModel createCommentServiceModel = new()
+			{
+				Message = MESSAGE
+			};
+			Comment comment = new()
+			{
+				Message = MESSAGE,
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.AddAsync(It.IsAny<Comment>()))
+				.ReturnsAsync(false);
+			this._postRepositoryMock
+				.Setup(p => p.DoesPostExist(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._mapperMock
+				.Setup(p => p.Map<Comment>(It.IsAny<CreateCommentServiceModel>()))
+				.Returns(comment);
+
+			Guid result = await this._commentService.AddComment(createCommentServiceModel);
+
+			Assert.IsTrue(result == Guid.Empty);
+		}
+
+		[Test]
+		public void AddComment_ThrowsException_WhenPostDoesNotExist()
+		{
+			const string EXCEPTION_MESSAGE = "Post does not exist!";
+
+			CreateCommentServiceModel createCommentServiceModel = new()
+			{
+				Message = MESSAGE
+			};
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._commentService.AddComment(createCommentServiceModel), "AddComment does not throw excpeion when the post does not exist");
+
+			// Assert.AreEqual(EXCEPTION_MESSAGE, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+
+		#region GetCommentById
+		[Test]
+		public async Task GetCommentById_ReturnsTheComment_WhenItExists()
+		{
+			Guid creatorId = new();
+			User creator = new() { Id = creatorId };
+			Comment comment = new()
+			{
+				Message = MESSAGE,
+				Creator = creator
+			};
+			ReadCommentServiceModel commentServiceModel = new()
+			{
+				Message = MESSAGE
+			};
+			User user = new()
+			{
+				Id = creatorId,
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(comment);
+			this._userRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(user);
+			this._mapperMock
+				.Setup(p => p.Map<ReadCommentServiceModel>(It.IsAny<Comment>()))
+				.Returns(commentServiceModel);
+
+			ReadCommentServiceModel result = await this._commentService.GetCommentById(Guid.NewGuid());
+
+			Assert.AreEqual(MESSAGE, result.Message);
+		}
+
+		[Test]
+		public void GetCommentById_ThorwsException_WhenTheUserDoesNotExist()
+		{
+			const string EXCEPTION_MESSAGE = "The user does not exist";
+			Guid creatorId = new();
+			User creator = new() { Id = creatorId };
+			Comment comment = new()
+			{
+				Message = MESSAGE,
+				Creator = creator
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(comment);
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._commentService.GetCommentById(Guid.NewGuid()), "GetCommentById does not throw exception when the user does not exist");
+
+			// Assert.AreEqual(EXCEPTION_MESSAGE, ex.Message);
+		}
+
+		[Test]
+		public void GetCommentById_ThrowsException_WhenCommentDoesNotExist()
+		{
+			string exceptionMessage = "The comment does not exist";
+			Guid creatorId = new();
+			User user = new()
+			{
+				Id = creatorId,
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.Returns(Task.FromResult<Comment>(null));
+			this._userRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(user);
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._commentService.GetCommentById(Guid.NewGuid()));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+
+		#region UpdateComment
+		[Test]
+		public async Task UpdateComment_ReturnsTheIdOfTheComment_WhenUpdatedSuccessfully()
+		{
+			Guid id = Guid.NewGuid();
+			Comment comment = new()
+			{
+				Id = id,
+				Message = MESSAGE
+			};
+			UpdateCommentServiceModel updateCommentServiceModel = new()
+			{
+				CommentId = id,
+				NewMessage = MESSAGE
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.DoesCommentExist(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._commentRepositoryMock
+				.Setup(p => p.EditAsync(It.IsAny<Guid>(), It.IsAny<Comment>()))
+				.ReturnsAsync(true);
+			this._commentRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(comment);
+			this._mapperMock
+				.Setup(p => p.Map<Comment>(It.IsAny<UpdateCommentServiceModel>()))
+				.Returns(comment);
+
+			Guid result = await this._commentService.UpdateComment(updateCommentServiceModel);
+
+			Assert.AreEqual(updateCommentServiceModel.CommentId, result);
+		}
+
+		[Test]
+		public async Task UpdateComment_ReturnsEmptyId_WhenTheCommentIsNotUpdatedSuccessfully()
+		{
+			Comment comment = new()
+			{
+				Message = MESSAGE
+			};
+			UpdateCommentServiceModel updateCommentServiceModel = new()
+			{
+				CommentId = Guid.NewGuid(),
+				NewMessage = MESSAGE
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.DoesCommentExist(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._commentRepositoryMock
+				.Setup(p => p.EditAsync(It.IsAny<Guid>(), It.IsAny<Comment>()))
+				.ReturnsAsync(false);
+			this._mapperMock
+				.Setup(p => p.Map<Comment>(It.IsAny<UpdateCommentServiceModel>()))
+				.Returns(comment);
+
+			Guid result = await this._commentService.UpdateComment(updateCommentServiceModel);
+
+			Assert.AreEqual(Guid.Empty, result);
+		}
+
+		[Test]
+		public void UpdateComment_ThrowsArgumentException_WhenCommentDoesNotExist()
+		{
+			string exceptionMessage = "Comment does not exist!";
+			UpdateCommentServiceModel updateCommentServiceModel = new()
+			{
+			};
+
+			this._commentRepositoryMock
+				.Setup(p => p.DoesCommentExist(It.IsAny<Guid>()))
+				.ReturnsAsync(false);
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._commentService.UpdateComment(updateCommentServiceModel));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+
+		#region DeleteComment
+		[Test]
+		[TestCase(true)]
+		[TestCase(false)]
+		public async Task DeleteComment_ShouldReturnIfDeletionIsSuccessfull_WhenCommentExists(bool shouldPass)
+		{
+			Guid id = new();
+			Comment comment = new();
+
+			this._commentRepositoryMock
+				.Setup(p => p.DoesCommentExist(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._commentRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(comment);
+			this._commentRepositoryMock
+				.Setup(p => p.DeleteAsync(It.IsAny<Comment>()))
+				.ReturnsAsync(shouldPass);
+
+			bool result = await this._commentService.DeleteComment(id);
+
+			Assert.AreEqual(shouldPass, result);
+		}
+
+		[Test]
+		public void DeleteComment_ThrowsException_WhenCommentDoesNotExist()
+		{
+			string exceptionMessage = "Comment does not exist!";
+			Guid id = new();
+
+			this._commentRepositoryMock
+				.Setup(p => p.DoesCommentExist(It.IsAny<Guid>()))
+				.ReturnsAsync(false);
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._commentService.DeleteComment(id));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorrect exception message");
+		}
+		#endregion
+	}
+}