print barcode labels in c# Propagating Testability Changes to the Service Layer in VB.NET

Draw Quick Response Code in VB.NET Propagating Testability Changes to the Service Layer

Propagating Testability Changes to the Service Layer
Painting QR Code ISO/IEC18004 In Visual Basic .NET
Using Barcode creation for .NET framework Control to generate, create QR Code 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
QR Code 2d Barcode Scanner In Visual Basic .NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
The chain of changes doesn t end here. Methods on a typical service layer class will likely have dependencies on the DAL. To test service layer classes effectively and in full isolation, you also need to decouple them from DAL references. Here s a revamped version of the CustomerServices class:
Bar Code Drawer In Visual Basic .NET
Using Barcode creation for VS .NET Control to generate, create bar code image in .NET applications.
www.OnBarcode.com
Bar Code Recognizer In VB.NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
public class CustomerServices : ICustomerServices { // Constructors public CustomerServices() { Initialize(null, null); } public CustomerServices(ICustomerRepository custRepo, IOrderRepository orderRepo) { Initialize(custRepo, orderRepo); } // Properties ICustomerRepository CustomerRepository { get; private set; } IOrderRepository OrderRepository { get; private set; } // Methods public Customer FindById(int customerId) { // Get any necessary data from the DAL var customer = CustomerRepository.FindById(customerId); return customer; } ... // Internal members private void Initialize(ICustomerRepository custRepo, IOrderRepository orderRepo) { CustomerRepository = (custRepo new CodeSampleRepository()); OrderRepository = (orderRepo new Repository()); } }
Paint QR Code In Visual C#.NET
Using Barcode encoder for VS .NET Control to generate, create Quick Response Code image in Visual Studio .NET applications.
www.OnBarcode.com
QR-Code Generator In Visual Studio .NET
Using Barcode drawer for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
www.OnBarcode.com
Also in this case, the behavior of the DAL components the service layer class depends upon has been abstracted to an interface and a parameter-based constructor has been added to the service layer class primarily for testability reasons. Let s see how to write unit tests.
QR Code JIS X 0510 Creator In VS .NET
Using Barcode printer for .NET Control to generate, create QR image in VS .NET applications.
www.OnBarcode.com
PDF417 Generator In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
Part II The Core of ASP.NET MVC
Making ECC200 In VB.NET
Using Barcode generator for .NET Control to generate, create DataMatrix image in VS .NET applications.
www.OnBarcode.com
2D Barcode Maker In VB.NET
Using Barcode drawer for .NET Control to generate, create 2D Barcode image in .NET applications.
www.OnBarcode.com
Writing Unit Tests
Quick Response Code Creation In Visual Basic .NET
Using Barcode maker for Visual Studio .NET Control to generate, create Quick Response Code image in Visual Studio .NET applications.
www.OnBarcode.com
Painting Postnet 3 Of 5 In VB.NET
Using Barcode creation for .NET framework Control to generate, create USPS POSTNET Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
A unit is the smallest part of an application that is testable typically, a method. Unit testing consists of writing and running a small program (referred to as a test harness) that instantiates classes and invokes methods in an automatic way. In the end, running a battery of tests is much like compiling. You click a button, you run the test harness and, at the end of it, you know what went wrong, if anything. The most effective way to conduct unit testing passes through the use of an automated test framework. An automated test framework is a developer tool that normally includes a run-time engine and a framework of classes for simplifying the creation of test programs. Choosing a framework is up to you, and quite a few excellent options exist in the open-source arena. A popular framework is NUnit. (See http://www.nunit.org.) A testing framework, MSTest, is also integrated with Visual Studio. As shown in Figure 4-15, ASP.NET MVC asks you whether you want to add a test project to your solution.
QR Code Decoder In .NET Framework
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Paint QR In Java
Using Barcode drawer for Android Control to generate, create QR Code JIS X 0510 image in Android applications.
www.OnBarcode.com
FIGuRE 4-15 Creating a unit test project
1D Generator In VS .NET
Using Barcode creator for ASP.NET Control to generate, create 1D Barcode image in ASP.NET applications.
www.OnBarcode.com
PDF 417 Drawer In Java
Using Barcode generation for Java Control to generate, create PDF417 image in Java applications.
www.OnBarcode.com
Basics of Unit Testing with MSTest
GTIN - 128 Creation In Java
Using Barcode generation for Java Control to generate, create UCC.EAN - 128 image in Java applications.
www.OnBarcode.com
Creating QR Code ISO/IEC18004 In Objective-C
Using Barcode drawer for iPad Control to generate, create QR Code 2d barcode image in iPad applications.
www.OnBarcode.com
You start by grouping related tests in a text fixture. Text fixtures are just test-specific classes where methods typically represent tests to run. In a text fixture, you might also have code that executes at the start and end of the test run. Here s the skeleton of a text fixture with MSTest:
Printing Barcode In Objective-C
Using Barcode generation for iPhone Control to generate, create barcode image in iPhone applications.
www.OnBarcode.com
Recognizing EAN-13 Supplement 5 In VB.NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
using Microsoft.VisualStudio.TestTools.UnitTesting; ... [TestClass] public class CustomerTest { private Customer customer;
4 Inside Controllers
[TestInitialize] public void SetUp() { customer = new Customer(); } [TestCleanup] public void TearDown() { customer = null; } // Your tests go here [TestMethod] public void ShouldAssignCompanyNameToCustomer() { ... } ... }
You need to have tests for each significant class. A good practice is to have an XxxTest class for each Xxx class in a given assembly. With MSTest, you transform a plain .NET class into a test fixture by simply adding the TestClass attribute. You turn a method of this class into a test method by using the TestMethod attribute instead. Attributes such as TestInitialize and TestCleanup have a special meaning and indicate code to execute at the start and end of each and every test so that no two tests are dependent. Let s write out a test for a sample ContentController class that uses a service layer infrastructure to retrieve information about chapters. The ContentController class derives from our base class and thus gains access to the ApplicationContext class.
Writing a Sample Unit Test
The test we re going to write verifies that the ContentController class will successfully retrieve information about 1 when a value of 1 is passed to its Loads method. Here s the code of the test fixture:
[TestClass] public class ContentControllerTest { private ApplicationContext appContext; [TestInitialize] public void Setup() { appContext = new ApplicationContext(); appContext.Logger = new FakeLogger();
Copyright © OnBarcode.com . All rights reserved.