1 files changed, 315 insertions, 0 deletions
diff --git a/src/Services/DevHive.Services.Tests/LanguageService.Tests.cs b/src/Services/DevHive.Services.Tests/LanguageService.Tests.cs
new file mode 100644
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+++ b/src/Services/DevHive.Services.Tests/LanguageService.Tests.cs
@@ -0,0 +1,315 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Threading.Tasks;
+using AutoMapper;
+using DevHive.Data.Interfaces;
+using DevHive.Data.Models;
+using DevHive.Services.Models.Language;
+using DevHive.Services.Services;
+using Moq;
+using NUnit.Framework;
+
+namespace DevHive.Services.Tests
+{
+	[TestFixture]
+	public class LanguageServiceTests
+	{
+		private Mock<ILanguageRepository> _languageRepositoryMock;
+		private Mock<IMapper> _mapperMock;
+		private LanguageService _languageService;
+
+		#region SetUps
+		[SetUp]
+		public void SetUp()
+		{
+			this._languageRepositoryMock = new Mock<ILanguageRepository>();
+			this._mapperMock = new Mock<IMapper>();
+			this._languageService = new LanguageService(this._languageRepositoryMock.Object, this._mapperMock.Object);
+		}
+		#endregion
+
+		#region CreateLanguage
+		[Test]
+		public async Task CreateLanguage_ReturnsNonEmptyGuid_WhenEntityIsAddedSuccessfully()
+		{
+			string technologyName = "Gosho Trapov";
+			Guid id = Guid.NewGuid();
+			CreateLanguageServiceModel createLanguageServiceModel = new CreateLanguageServiceModel
+			{
+				Name = technologyName
+			};
+			Language language = new Language
+			{
+				Name = technologyName,
+				Id = id
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageNameExistAsync(It.IsAny<string>()))
+				.ReturnsAsync(false);
+			this._languageRepositoryMock
+				.Setup(p => p.AddAsync(It.IsAny<Language>()))
+				.ReturnsAsync(true);
+			this._languageRepositoryMock
+				.Setup(p => p.GetByNameAsync(It.IsAny<string>()))
+				.ReturnsAsync(language);
+			this._mapperMock
+				.Setup(p => p.Map<Language>(It.IsAny<CreateLanguageServiceModel>()))
+				.Returns(language);
+
+			Guid result = await this._languageService.CreateLanguage(createLanguageServiceModel);
+
+			Assert.AreEqual(id, result);
+		}
+
+		[Test]
+		public async Task CreateLanguage_ReturnsEmptyGuid_WhenEntityIsNotAddedSuccessfully()
+		{
+			string languageName = "Gosho Trapov";
+
+			CreateLanguageServiceModel createLanguageServiceModel = new CreateLanguageServiceModel
+			{
+				Name = languageName
+			};
+			Language language = new Language
+			{
+				Name = languageName
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageNameExistAsync(It.IsAny<string>()))
+				.ReturnsAsync(false);
+			this._languageRepositoryMock
+				.Setup(p => p.AddAsync(It.IsAny<Language>()))
+				.ReturnsAsync(false);
+			this._mapperMock
+				.Setup(p => p.Map<Language>(It.IsAny<CreateLanguageServiceModel>()))
+				.Returns(language);
+
+			Guid result = await this._languageService.CreateLanguage(createLanguageServiceModel);
+
+			Assert.IsTrue(result == Guid.Empty);
+
+		}
+
+		[Test]
+		public void CreateLanguage_ThrowsArgumentException_WhenEntityAlreadyExists()
+		{
+			string exceptionMessage = "Language already exists!";
+			string languageName = "Gosho Trapov";
+
+			CreateLanguageServiceModel createLanguageServiceModel = new CreateLanguageServiceModel
+			{
+				Name = languageName
+			};
+			Language language = new Language
+			{
+				Name = languageName
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageNameExistAsync(It.IsAny<string>()))
+				.ReturnsAsync(true);
+
+			Exception ex = Assert.ThrowsAsync<DuplicateNameException>(() => this._languageService.CreateLanguage(createLanguageServiceModel));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+
+		#region GetLanguageById
+		[Test]
+		public async Task GetLanguageById_ReturnsTheLanguage_WhenItExists()
+		{
+			Guid id = Guid.NewGuid();
+			string name = "Gosho Trapov";
+			Language language = new Language
+			{
+				Name = name
+			};
+			ReadLanguageServiceModel readLanguageServiceModel = new ReadLanguageServiceModel
+			{
+				Name = name
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(language);
+			this._mapperMock
+				.Setup(p => p.Map<ReadLanguageServiceModel>(It.IsAny<Language>()))
+				.Returns(readLanguageServiceModel);
+
+			ReadLanguageServiceModel result = await this._languageService.GetLanguageById(id);
+
+			Assert.AreEqual(name, result.Name);
+		}
+
+		[Test]
+		public void GetLanguageById_ThrowsException_WhenLanguageDoesNotExist()
+		{
+			string exceptionMessage = "The language does not exist";
+			Guid id = Guid.NewGuid();
+			this._languageRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.Returns(Task.FromResult<Language>(null));
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._languageService.GetLanguageById(id));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+
+		#region GetLanguages
+		[Test]
+		public void GetLanguages_ReturnsAllLanguages_IfAnyExist()
+		{
+			ReadLanguageServiceModel firstLanguage = new ReadLanguageServiceModel();
+			ReadLanguageServiceModel secondLanguage = new ReadLanguageServiceModel();
+			HashSet<ReadLanguageServiceModel> languges = new HashSet<ReadLanguageServiceModel>();
+			languges.Add(firstLanguage);
+			languges.Add(secondLanguage);
+
+			this._languageRepositoryMock
+				.Setup(p => p.GetLanguages())
+				.Returns(new HashSet<Language>());
+			this._mapperMock
+				.Setup(p => p.Map<HashSet<ReadLanguageServiceModel>>(It.IsAny<HashSet<Language>>()))
+				.Returns(languges);
+
+			HashSet<ReadLanguageServiceModel> result = this._languageService.GetLanguages();
+
+			Assert.GreaterOrEqual(2, result.Count, "GetLanguages does not return all languages");
+		}
+
+		[Test]
+		public void GetLanguages_ReturnsEmptyHashSet_IfNoLanguagesExist()
+		{
+			this._languageRepositoryMock
+				.Setup(p => p.GetLanguages())
+				.Returns(new HashSet<Language>());
+			this._mapperMock
+				.Setup(p => p.Map<HashSet<ReadLanguageServiceModel>>(It.IsAny<HashSet<Language>>()))
+				.Returns(new HashSet<ReadLanguageServiceModel>());
+
+			HashSet<ReadLanguageServiceModel> result = this._languageService.GetLanguages();
+
+			Assert.IsEmpty(result, "GetLanguages does not return empty string when no languages exist");
+		}
+		#endregion
+
+		#region UpdateLanguage
+		[Test]
+		[TestCase(true)]
+		[TestCase(false)]
+		public async Task UpdateLanguage_ReturnsIfUpdateIsSuccessfull_WhenLanguageExistsy(bool shouldPass)
+		{
+			string name = "Gosho Trapov";
+			Guid id = Guid.NewGuid();
+			Language language = new Language
+			{
+				Name = name,
+				Id = id
+			};
+			UpdateLanguageServiceModel updateLanguageServiceModel = new UpdateLanguageServiceModel
+			{
+				Name = name,
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageExistAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageNameExistAsync(It.IsAny<string>()))
+				.ReturnsAsync(false);
+			this._languageRepositoryMock
+				.Setup(p => p.EditAsync(It.IsAny<Guid>(), It.IsAny<Language>()))
+				.ReturnsAsync(shouldPass);
+			this._mapperMock
+				.Setup(p => p.Map<Language>(It.IsAny<UpdateLanguageServiceModel>()))
+				.Returns(language);
+
+			bool result = await this._languageService.UpdateLanguage(updateLanguageServiceModel);
+
+			Assert.AreEqual(shouldPass, result);
+		}
+
+		[Test]
+		public void UpdateLanguage_ThrowsArgumentException_WhenLanguageDoesNotExist()
+		{
+			string exceptionMessage = "Language does not exist!";
+			UpdateLanguageServiceModel updateTechnologyServiceModel = new UpdateLanguageServiceModel
+			{
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageExistAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(false);
+
+			Exception ex = Assert.ThrowsAsync<DuplicateNameException>(() => this._languageService.UpdateLanguage(updateTechnologyServiceModel));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+
+		[Test]
+		public void UpdateLanguage_ThrowsException_WhenLanguageNameAlreadyExists()
+		{
+			string exceptionMessage = "Language name already exists in our data base!";
+			UpdateLanguageServiceModel updateTechnologyServiceModel = new UpdateLanguageServiceModel
+			{
+			};
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageExistAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageNameExistAsync(It.IsAny<string>()))
+				.ReturnsAsync(true);
+
+			Exception ex = Assert.ThrowsAsync<DuplicateNameException>(() => this._languageService.UpdateLanguage(updateTechnologyServiceModel));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+
+		#region DeleteLanguage
+		[Test]
+		[TestCase(true)]
+		[TestCase(false)]
+		public async Task DeleteLanguage_ShouldReturnIfDeletionIsSuccessfull_WhenLanguageExists(bool shouldPass)
+		{
+			Guid id = Guid.NewGuid();
+			Language language = new Language();
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageExistAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(true);
+			this._languageRepositoryMock
+				.Setup(p => p.GetByIdAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(language);
+			this._languageRepositoryMock
+				.Setup(p => p.DeleteAsync(It.IsAny<Language>()))
+				.ReturnsAsync(shouldPass);
+
+			bool result = await this._languageService.DeleteLanguage(id);
+
+			Assert.AreEqual(shouldPass, result);
+		}
+
+		[Test]
+		public void DeleteLanguage_ThrowsException_WhenLanguageDoesNotExist()
+		{
+			string exceptionMessage = "Language does not exist!";
+			Guid id = Guid.NewGuid();
+
+			this._languageRepositoryMock
+				.Setup(p => p.DoesLanguageExistAsync(It.IsAny<Guid>()))
+				.ReturnsAsync(false);
+
+			Exception ex = Assert.ThrowsAsync<ArgumentNullException>(() => this._languageService.DeleteLanguage(id));
+
+			// Assert.AreEqual(exceptionMessage, ex.Message, "Incorecct exception message");
+		}
+		#endregion
+	}
+}