protected void btnSubstract_Click(object sender, EventArgs e)
{
int num1 = Convert.ToInt32(txtNum1.Text);
int num2 = Convert.ToInt32(txtNum2.Text);
int result = CalculationOperation.Substract(num1, num2);
lblResult.Text = result.ToString();
}
public void Subtraction_test()
{
//Arrange Section- we initialize variables and set its values.
int expectedResult = 20;
int num1 = 24;
int num2 = 4;
//Act Section- We invoke the method we want to test.
int actualResult = CalculationOperation.Substract(num1, num2);
//Assert Section- we verify the method that we want to verify if the emthod behaves as per expected
Assert.AreEqual(expectedResult, actualResult);
Console.WriteLine("This is the test method for subtraction");
}