public void HeightAndWidthZero_AreaZero()
{
RectangleAreaCalculator rectangleAreaCalculator = new RectangleAreaCalculator();
int rectangleArea = rectangleAreaCalculator.RectangleArea(0, 0);
Assert.Equal(0, rectangleArea);
}
public void HeightAndWidthPositive_Works()
{
RectangleAreaCalculator rectangleAreaCalculator = new RectangleAreaCalculator();
int rectangleArea = rectangleAreaCalculator.RectangleArea(10, 5);
Assert.Equal(10 * 5, rectangleArea);
}
public void HeightNegative_ArgumentExceptionIsThrown()
{
RectangleAreaCalculator rectangleAreaCalculator = new RectangleAreaCalculator();
Assert.Throws <ArgumentException>(() => rectangleAreaCalculator.RectangleArea(-5, 5));
}