First, you need some code to test. Imagine you have a
Rectangle class that exposes methods for math calculations on a rectangle’s perimeter and area. Create a new class library, name it UnitTestDemo; then rename Class1.vb as Rectangle.vb and write the following code:
Imagine you want to test both methods to check if they work correctly but inside an isolated environment, abstracted from the original project. In the code editor select both methods; then right-click and select Create Unit Tests. This launches the Create Unit Tests dialog, where you can select objects to add to the test project. Expand the
UnitTestDemo namespace ...