public void WhenExecutingEmptyEquation_ThenResultShouldSayNothing()
{
// Arrange
var vm = new CalculatorViewModel(new EquationParser(), new Calculator());
vm.Equation = "";
// Act
vm.Execute();
// Assert
Assert.AreEqual("Nothing", vm.Result);
}
public void WhenExecutingAnAddEquation_ThenResultShouldAddTheTwoNumbers()
{
// Arrange
var vm = new CalculatorViewModel(new EquationParser(), new Calculator());
vm.Equation = "1+2";
// Act
vm.Execute();
// Assert
Assert.AreEqual("3", vm.Result);
}