MSTest is a unit testing framework for .NET applications. It is part of the Microsoft Testing Tools suite and is commonly used for creating and executing unit tests in Visual Studio. MSTest provides a set of attributes, assertions, and test execution features for writing and managing tests within the .NET ecosystem.
1. Test Class: A test class in MSTest contains one or more test methods. It is marked with the [TestClass] attribute.
2. Test Method: A test method is a unit of execution within a test class. It is marked with the [TestMethod] attribute.
3. Test Initialization and Cleanup: Initialization and cleanup methods in MSTest are marked with the [TestInitialize] and [TestCleanup] attributes, respectively. They run before and after each test method.
4. Assert Class: The Assert class in MSTest provides various methods for making assertions in test methods. Common methods include Assert.AreEqual and Assert.IsTrue.
5. Data-Driven Tests: MSTest supports data-driven tests using the [DataSource] attribute or other data-related attributes to provide test data from external sources.
MSTest is a unit testing framework for .NET applications. It is part of the Microsoft Testing Tools suite and is commonly used for creating and executing unit tests in Visual Studio.
A test class in MSTest contains one or more test methods. It is marked with the [TestClass] attribute, and each test method is marked with the [TestMethod] attribute.
A test method in MSTest is a unit of execution within a test class. It is marked with the [TestMethod] attribute and contains the actual test logic and assertions.
The [TestInitialize] attribute in MSTest marks a method that is executed before each test method, providing a setup phase. The [TestCleanup] attribute marks a method that is executed after each test method for cleanup.
The Assert class in MSTest provides methods for making assertions in test methods. Common methods include Assert.AreEqual, Assert.IsTrue, and Assert.IsFalse.
The [TestMethod] attribute in MSTest marks a method as a test method. When a test runner discovers this attribute, it executes the method as part of the test suite.
Data-driven testing in MSTest can be performed using the [DataSource] attribute or other data-related attributes. These attributes allow you to provide test data from external sources like CSV files, databases, or custom data providers.
A data-driven test in MSTest is a test method that is executed multiple times with different sets of input data. This is achieved using the [DataSource] attribute to specify the data source and parameters for the test method.
The [TestMethod] attribute in MSTest has properties like ExpectedException and Timeout for specifying expected exceptions and maximum test duration, respectively. These properties provide additional control over test behavior.
Expected exceptions in MSTest can be handled using the [ExpectedException] attribute or the Assert.Throws method. These approaches allow for specifying and asserting the occurrence of exceptions.
The Assert.IsTrue method in MSTest is used to verify that a specified condition is true. It fails the test if the condition is false.
The MSTest Test Explorer in Visual Studio is a tool that provides a visual representation of all available tests in a solution. It allows developers to discover, run, and debug tests interactively.
In MSTest, you can run a subset of tests by using the Test Explorer in Visual Studio or by using the command-line test runner with the /tests option. Test filtering options allow developers to execute specific tests or test classes.
Test categories in MSTest provide a way to categorize tests using attributes like [TestCategory]. This allows for the selective execution of tests based on categories.
To write a parameterized test in MSTest, you can use the [DataRow] attribute or other data-related attributes. These attributes allow you to provide different sets of input parameters for a test method.
The [DataRow] attribute in MSTest is used to define parameterized tests. It allows you to specify different sets of input parameters for a test method.
MSTest supports asynchronous tests using the [TestMethod] attribute with an async method. The test runner automatically awaits asynchronous operations, allowing for asynchronous test scenarios.
The Assert.Fail method in MSTest is used to explicitly mark a test as failed. It is often used to indicate that a specific branch of code should not be reached or to create intentionally failing tests.
MSTest tests can be run from the command line using the MSTest command-line executable (usually named vstest.console.exe). Developers can specify the test assembly or other parameters to control test execution.
The [TestMethod] attribute in MSTest has a Priority property for specifying the priority or order of test execution. This allows developers to control the order in which tests are run within a test class.
The MSTest Code Coverage feature is a tool that measures how much of your code is covered by your tests. It helps identify areas of code that need additional test coverage and ensures comprehensive testing of the application.