Implementing Unit Test using MS Test
Owned by Bantyder Bahru (Unlicensed)
1. Implementing Test at the business
In order to start writing unit test there are a couple of things you have to know ,
First as we have discussed earlier all the layers are separated nicely so you need something which simulates the DI task , on which we can configure all dependency required to run our test. For this purpose I will use Moq(Read more: https://code.google.com/p/moq/)
1. Install Moq in your test project
https://code.google.com/p/moq/downloads/detail?name=Moq.4.0.10827.Final.zip&can=2&q=
Extract and reference in your test project
2.Write your test class as shown below
Testing the Services Expand source
//ProductServiceTests.cs
[TestClass]
public class ProductServiceTest
{
[TestMethod]
public void Can_Add_Product_Service()
{
//Arrange
List<Product> products = new List<Product>()
{
new Product(){Description="P1",ProductId=1,ProductName="p1Name"},
new Product(){Description="P2",ProductId=2,ProductName="p2Name"},
new Product(){Description="P3",ProductId=3,ProductName="p3Name"},
new Product(){Description="P4",ProductId=4,ProductName="p4Name"},
new Product(){Description="P5",ProductId=5,ProductName="p5Name"},
new Product(){Description="P6",ProductId=6,ProductName="p6Name"}
};
Mock<IGenericRepository<Product>> mock1 = new Mock<IGenericRepository<Product>>();
//Here we are going to mock repository GetAll method
mock1.Setup(m => m.GetAll()).Returns(products);
//Here we are going to mock repository Add method
mock1.Setup(m => m.Add(It.IsAny<Product>())).Returns((Product target) =>
{
var original = products.FirstOrDefault(
q => q.ProductId == target.ProductId);
if (original != null)
{
return false;
}
products.Add(target);
return true;
});
//Now we have our repository ready for property injection
//Here we are going to mock our IUnitOfWork
Mock<IUnitOfWork> mock = new Mock<IUnitOfWork>();
//Here we are going to inject our repository to the property
//mock.SetupProperty(m => m.ProductRepository).SetReturnsDefault(mock1.Object);
mock.Setup(m => m.ProductRepository).Returns(mock1.Object);
//Now our UnitOfWork is ready to be injected to the service
//Here we inject UnitOfWork to constractor of our service
ProductService productService = new ProductService(mock.Object);
//Act
productService.AddProduct(new Product
{
ProductId = 7,
ProductName = "P7Name",
Description = "P7"
});
var result = productService.GetAllProduct();
var newProduct = result.FirstOrDefault(t => t.ProductId == 7);
//Assert
Assert.AreEqual(products.Count, result.Count);
Assert.AreEqual("P7Name", newProduct.ProductName);
Assert.AreEqual("P7", newProduct.Description);
}
[TestMethod]
public void Can_Get_All_Product_Service()
{
//Arrange
List<Product> products = new List<Product>()
{
new Product(){Description="P1",ProductId=1,ProductName="p1Name"},
new Product(){Description="P2",ProductId=2,ProductName="p2Name"},
new Product(){Description="P3",ProductId=3,ProductName="p3Name"},
new Product(){Description="P4",ProductId=4,ProductName="p4Name"},
new Product(){Description="P5",ProductId=5,ProductName="p5Name"},
new Product(){Description="P6",ProductId=6,ProductName="p6Name"}
};
Mock<IGenericRepository<Product>> mock1 = new Mock<IGenericRepository<Product>>();
//Here we are going to mock repository GetAll method
mock1.Setup(m => m.GetAll()).Returns(products);
//Now we have our repository ready for property injection
//Here we are going to mock our IUnitOfWork
Mock<IUnitOfWork> mock = new Mock<IUnitOfWork>();
//Here we are going to inject our repository to the property
mock.Setup(m => m.ProductRepository).Returns(mock1.Object);
//Now our UnitOfWork is ready to be injected to the service
//Here we inject UnitOfWork to constractor of our service
ProductService productService = new ProductService(mock.Object);
//Act
var result = productService.GetAllProduct();
//Assert
Assert.AreEqual(products,result);
}
[TestMethod]
public void Can_Update_Product_Service()
{
//Arrange
List<Product> products = new List<Product>()
{
new Product(){Description="P1",ProductId=1,ProductName="p1Name"},
new Product(){Description="P2",ProductId=2,ProductName="p2Name"},
new Product(){Description="P3",ProductId=3,ProductName="p3Name"},
new Product(){Description="P4",ProductId=4,ProductName="p4Name"},
new Product(){Description="P5",ProductId=5,ProductName="p5Name"},
new Product(){Description="P6",ProductId=6,ProductName="p6Name"}
};
Mock<IGenericRepository<Product>> mock1 = new Mock<IGenericRepository<Product>>();
//Here we are going to mock repository Edit method
mock1.Setup(m => m.Edit(It.IsAny<Product>())).Returns((Product target) =>
{
var original = products.FirstOrDefault( q => q.ProductId == target.ProductId);
if (original == null)
{
return false;
}
original.ProductName = target.ProductName;
original.Description = target.Description;
return true;
});
//Now we have our repository ready for property injection
//Here we are going to mock our IUnitOfWork
Mock<IUnitOfWork> mock = new Mock<IUnitOfWork>();
//Here we are going to inject our repository to the property
mock.Setup(m => m.ProductRepository).Returns(mock1.Object);
//Now our UnitOfWork is ready to be injected to the service
//Here we inject UnitOfWork to constractor of our service
ProductService productService = new ProductService(mock.Object);
//Act
var updatedProduct = new Product() {ProductId = 1, ProductName = "p1NameModified", Description = "p1Modified"};
productService.UpdateProduct(updatedProduct);
var actualProduct = products.FirstOrDefault(t => t.ProductId == 1);
//Assert
Assert.AreEqual(actualProduct.ProductName ,updatedProduct.ProductName);
Assert.AreEqual(actualProduct.Description, updatedProduct.Description);
}
[TestMethod]
public void Can_Delete_Product_Service()
{
//Arrange
List<Product> products = new List<Product>()
{
new Product(){Description="P1",ProductId=1,ProductName="p1Name"},
new Product(){Description="P2",ProductId=2,ProductName="p2Name"},
new Product(){Description="P3",ProductId=3,ProductName="p3Name"},
new Product(){Description="P4",ProductId=4,ProductName="p4Name"},
new Product(){Description="P5",ProductId=5,ProductName="p5Name"},
new Product(){Description="P6",ProductId=6,ProductName="p6Name"},
};
Mock<IGenericRepository<Product>> mock1 = new Mock<IGenericRepository<Product>>();
//Here we are going to mock repository FindById Method
mock1.Setup(m => m.FindById(It.IsAny<int>())).Returns((int i) => products.Single(x => x.ProductId == i));
//Here we are going to mock repository Delete method
mock1.Setup(m => m.Delete(It.IsAny<Product>())).Returns((Product target) =>
{
var original = products.FirstOrDefault( q => q.ProductId == target.ProductId);
if (original == null)
{
return false;
}
products.Remove(target);
return true;
});
//Now we have our repository ready for property injection
//Here we are going to mock our IUnitOfWork
Mock<IUnitOfWork> mock = new Mock<IUnitOfWork>();
//Here we are going to inject our repository to the property
mock.Setup(m => m.ProductRepository).Returns(mock1.Object);
//Now our UnitOfWork is ready to be injected to the service
//Here we inject UnitOfWork to constractor of our service
ProductService productService = new ProductService(mock.Object);
//Act
productService.DeleteProduct(6);
var result = products.FirstOrDefault(t => t.ProductId == 6);
//Assert
Assert.IsNull(result);
Assert.IsTrue(products.Count ==5);
}
[TestMethod]
public void Can_Find_By_Id()
{
//Arrange
List<Product> products = new List<Product>()
{
new Product(){Description="P1",ProductId=1,ProductName="p1Name"},
new Product(){Description="P2",ProductId=2,ProductName="p2Name"},
new Product(){Description="P3",ProductId=3,ProductName="p3Name"},
new Product(){Description="P4",ProductId=4,ProductName="p4Name"},
new Product(){Description="P5",ProductId=5,ProductName="p5Name"},
new Product(){Description="P6",ProductId=6,ProductName="p6Name"}
};
Mock<IGenericRepository<Product>> mock1 = new Mock<IGenericRepository<Product>>();
//Here we are going to mock repository FindById Method
mock1.Setup(m => m.FindById(It.IsAny<int>())).Returns((int i) => products.Single(x => x.ProductId == i));
//Now we have our repository ready for property injection
//Here we are going to mock our IUnitOfWork
Mock<IUnitOfWork> mock = new Mock<IUnitOfWork>();
//Here we are going to inject our repository to the property
mock.Setup(m => m.ProductRepository).Returns(mock1.Object);
//Now our UnitOfWork is ready to be injected to the service
//Here we inject UnitOfWork to constractor of our service
ProductService productService = new ProductService(mock.Object);
//Act
var result = productService.GetProduct(6);
var expected = products.Single(t => t.ProductId == 6);
//Assert
Assert.AreEqual(expected,result);
}
}
2. Implementing Controller unit test
In implementing test on your controller you can achieve UI Test simply, for this purpose I have created sample tests as shown below.
Controller Unit Tests Expand source
// ProductControllerTest.cs
[TestClass]
public class ProductControllerTest
{
[TestMethod]
public void Can_Paginate()
{
//Arrange
Mock<IProductService> mock= new Mock<IProductService>();
var products = new List<Product>();
mock.Setup(m => m.GetAllProduct()).Returns((new Product[]
{
new Product(){ProductId=1,ProductName = "P1"} ,
new Product(){ProductId=2,ProductName = "P2"} ,
new Product(){ProductId=3,ProductName = "P3"} ,
new Product(){ProductId=4,ProductName = "P4"} ,
new Product(){ProductId=5,ProductName = "P5"}
}).ToList());
ProductController controller=new ProductController(mock.Object);
controller.PageSize = 3;
//Act
ProductListViewModel result = (ProductListViewModel)controller.Index(2).Model;
//Assert
Product[] prodArray = result.Products.ToArray();
Assert.IsTrue(prodArray.Length==2);
Assert.AreEqual(prodArray[0].ProductName,"P4");
Assert.AreEqual(prodArray[1].ProductName,"P5");
}
[TestMethod]
public void Can_Generate_Page_Links()
{
//Arrange -define an Html helper -we need to do this
//in order to apply the extension method
HtmlHelper myHelper = null;
//Arrange -create PagingInfo data
PagingInfo pagingInfo = new PagingInfo()
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
//Arrange -set up the delegate using a lamda expression
Func<int, string> pageUrlDelegate = i => "Page" + i;
//Act
MvcHtmlString result = myHelper.PageLinks(pagingInfo, pageUrlDelegate);
//Assert
Assert.AreEqual(result.ToString(),@"<a href=""Page1"">1</a>"
+@"<a class=""selected"" href=""Page2"">2</a>"+
@"<a href=""Page3"">3</a>");
}
[TestMethod]
public void Can_Send_Pagination_View_Model()
{
Mock<IProductService> mock = new Mock<IProductService>();
mock.Setup(m => m.GetAllProduct()).Returns((new Product[]
{
new Product(){ProductId=1,ProductName = "P1"} ,
new Product(){ProductId=2,ProductName = "P2"} ,
new Product(){ProductId=3,ProductName = "P3"} ,
new Product(){ProductId=4,ProductName = "P4"} ,
new Product(){ProductId=5,ProductName = "P5"}
}).ToList());
ProductController controller = new ProductController(mock.Object);
controller.PageSize = 3;
//Act
ProductListViewModel result = (ProductListViewModel) controller.Index(2).Model;
//Assert
PagingInfo pagingInfo = result.PagingInfo;
Assert.AreEqual(pagingInfo.CurrentPage,2);
Assert.AreEqual(pagingInfo.ItemsPerPage,3);
Assert.AreEqual(pagingInfo.TotalItems,5);
Assert.AreEqual(pagingInfo.TotalPages,2);
}
}