public void ExpressionWithAdditionAndClickChangeSgnTest()
{
calculator.AddNumber("5");
calculator.AddOperation("+");
calculator.AddNumber("1");
calculator.Counting();
Assert.AreEqual(6, Convert.ToDouble(calculator.CurrentEntry));
calculator.ChangeSgn();
Assert.AreEqual(-6, Convert.ToDouble(calculator.CurrentEntry));
calculator.AddNumber("6");
calculator.AddOperation("+");
calculator.AddNumber("3");
calculator.Counting();
Assert.AreEqual(-63, Convert.ToDouble(calculator.CurrentEntry));
}
/// <summary> /// Click change sgn button. /// </summary> private void buttonChangeSgn_Click(object sender, EventArgs e) => calculator.ChangeSgn();