¿Cómo escribir pruebas unitarias en Visual Studio?

How to write unit test in Visual Studio?

If you are using Unit Test to write test case then the [TestClass] attribute is highly required in the Microsoft unit testing framework for any class that contains unit test methods that you would like to run in Visual Studio Test Explorer. Each and every test method that you want to run must having the [TestMethod]attribute above it.

While the test is running, the status bar at the top of the Test Explorer window is animated. At the end of the test run, the bar turns green if all the test methods pass, or red if any of the tests fail. In this case, the test fails. Select the method in Test Explorer to view the details at the bottom of the window.

The Microsoft.VisualStudio.TestTools.UnitTesting namespace supplies the classes, which provides Unit testing support. This namespace contains many attributes, which identifies test information to the test the engine regarding the data sources, order of method execution, program management, agent/host information and the deployment of the data.

The unit test has uncovered a bug: the amount of the withdrawal is added to the account balance when it should be subtracted. To correct the error, in the BankAccount.cs file, replace the line: In Test Explorer, choose Run All to rerun the test (or press Ctrl + R, V ).

First, let’s clear up any misconceptions by talking about what doesn’t count. Not every test you could conceivably write qualifies as a unit test. If you write code that stuffs things into a database or that reads a file from disk, you have not written a unit test.

Unit tests are (generally speaking) meant to test the interface of a class, meaning its public (and protected) methods. You can of course “hack” a solution to this (even if just by making the methods public), but you may also want to consider: If the method you’d like to test is really worth testing, it may be worth to move it into its own class.

The [TestClass] attribute is required on any class that contains unit test methods that you want to run in Test Explorer. Each test method that you want Test Explorer to recognize must have the [TestMethod] attribute.

The trace output from a ClassInitialize and ClassCleanup appears in the result summary. There should be a link named “Test run completed” on the top left corner of the [Test Results] window.

MSTest allows you to define shared setup and cleanup code for an entire test class by using methods decorated with the ClassInitialize and ClassCleanup attributes. Unlike their counterparts, TestInitialize and TestCleanup, methods decorated with these class-level attributes are executed just once per class, rather than once per test in the class.

In reality the functions are much more complex. So to test this we have 2 methods. Method 1: Use Functions and Actions to replace functionality of the methods. Example: