private void SqrtButton_Click(object sender, EventArgs e)
{
CalcFinction s = new CalcFinction();
displayX.Text = Convert.ToString(s.Sqrt(Convert.ToDouble(displayX.Text)));
displayY.Clear();
}
public void SqrtTest_forInt_x9_expected_3()
{
//arrage
double x = 9;
double expected = 3;
//act
CalcFinction s = new CalcFinction();
double actual = s.Sqrt(x);
//assert
Assert.AreEqual(expected, actual);
}