protected void btnAdd_Click(object sender, EventArgs e)
{
try
{
float res = AppEngine.Add(txbNum1.Text, txbNum2.Text);
lblResult.Text = res.ToString();
} catch (EngineException) {
lblResult.Text = "Invalid input";
}
}
public void AdditionTest()
{
float res = AppEngine.Add("45", "6");
Assert.AreEqual(res, 51);
res = AppEngine.Add("-7", "-6");
Assert.AreEqual(res, -13);
Assert.Throws <EngineException>(() => AppEngine.Add("", "6"));
Assert.Throws <EngineException>(() => AppEngine.Add("13", ""));
Assert.Throws <EngineException>(() => AppEngine.Add("1", "text"));
Assert.Throws <EngineException>(() => AppEngine.Add("text", "7"));
}
