Implementing Azure DevOps Solutions

Types of automated functional tests

When talking about automated functional tests, the three most-used types are unit tests, integration tests, and system tests. These types of test can be compared along several axes: the time it takes to create a test, the time it takes to execute a test, and the scope that they test:

• Unit tests: Unit tests are the quickest to write, and they execute very quickly, often in less than a millisecond. They test the smallest possible scope in an application, often a single class or method. This means that, once written, it should virtually never be necessary to change a unit test. For many systems, it is more likely that a test will be deleted rather than changed.
• Integration tests: Integration tests take more ...