public MainViewModel()
{
_random = new Random();
_themeNames = Directory.GetFiles(@"Themes", "*.xaml");
CalculatorViewModel = new CalculatorViewModel();
ChangeThemeCommand = new ActionCommand(ChangeTheme);
}
public void TestAdd()
{
var c = new CalculatorViewModel();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('1');
c.AddCommand.Execute();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('0');
c.EquateCommand.Execute();
Assert.IsTrue(Decimal.Equals(c.Result, 4.1M));
}
public void TestMultiply()
{
var c = new CalculatorViewModel();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('0');
c.PlusMinusCommand.Execute();
c.MultiplyCommand.Execute();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('0');
c.EquateCommand.Execute();
Assert.IsTrue(Decimal.Equals(c.Result, -4.0M));
}
public void TestAddSubtractAndEquate()
{
var c = new CalculatorViewModel();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('1');
c.PlusMinusCommand.Execute();
c.AddCommand.Execute();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('0');
c.SubtractCommand.Execute();
c.InputSymbol('2'); c.InputSymbol(','); c.InputSymbol('0');
c.EquateCommand.Execute();
Assert.IsTrue(Decimal.Equals(c.Result, -2.1M));
}
public void TestEmptyInput()
{
var c = new CalculatorViewModel();
c.Input = String.Empty;
Assert.IsTrue(c.Input == "0");
}