public void SubtractTwoIntegers()
{
SubtractExpression expr = new SubtractExpression(new ConstantExpression(2), new ConstantExpression(1));
Assert.IsNotNull(expr.LeftExpression);
Assert.IsNotNull(expr.RightExpression);
Assert.AreEqual(1, expr.Evaluate(null));
}
public void SubtractIntegerFromDouble()
{
SubtractExpression expr = new SubtractExpression(new ConstantExpression(2.5), new ConstantExpression(1));
Assert.AreEqual(2.5 - 1, expr.Evaluate(null));
}
public void SubtractTwoDoubles()
{
SubtractExpression expr = new SubtractExpression(new ConstantExpression(2.5), new ConstantExpression(3.7));
Assert.AreEqual(2.5 - 3.7, expr.Evaluate(null));
}
public void SubtractDoubleFromInteger()
{
SubtractExpression expr = new SubtractExpression(new ConstantExpression(1), new ConstantExpression(2.5));
Assert.AreEqual(1 - 2.5, expr.Evaluate(null));
}