Visual Basic 2015 Unleashed

Creating Unit Tests

First, you need some code to test. Imagine that you have a Rectangle class that exposes methods for math calculations on rectangles perimeter and area. Thus, create a new class library and name it UnitTestDemo; then rename Class1.vb as Rectangle.vb and write the following code:

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Class Rectangle    Shared Function CalculatePerimeter(ByVal sideA As Double,                                       ByVal sideB As Double) As Double        Return (sideA * 2) + (sideB * 2)    End Function    Shared Function CalculateArea(ByVal sideA As Double,                                  ByVal sideB As Double) As Double        Return sideA * sideB    End FunctionEnd Class

Imagine you want to test both methods to check ...