private Operand Subtract(string p1, string p2)
{
var fraction = Operand.Parse(p1);
var fraction2 = Operand.Parse(p2);
var sut = new SubtractOperator();
return(sut.Solve(fraction, fraction2));
}
public override VariableValue Evaluate(IVariableStore variables)
{
var left = Left.Evaluate(variables);
var right = Right.Evaluate(variables);
var result = SubtractOperator.Subtract(ref left, ref right);
return(Assign(variables, ref result));
}
public void SubtractOperatorTest()
{
string path = @"subtracttest.txt";
File.WriteAllText(path, "8\n3");
SubtractOperator subtract = new SubtractOperator(File.OpenText(path));
Assert.AreEqual(subtract.Evaluate(), 5);
Assert.AreEqual(subtract.ToString(), "(8-3)");
}
public void TestBuildExpressionForUnaryWithRightHandExpression()
{
var op = new SubtractOperator();
var expression = op.BuildExpression(
new Token("+", 1),
new[]
{
null,
Mock.Of <IExpression>(e => e.Evaluate(It.IsAny <IDictionary <string, object> >()) == (object)null)
},
ExpressiveOptions.None);
Assert.IsInstanceOfType(expression, typeof(MinusExpression));
}
public void TestGetPrecedenceForBinary()
{
var op = new SubtractOperator();
Assert.AreEqual(OperatorPrecedence.Subtract, op.GetPrecedence(new Token("1", 1)));
}
public void TestGetPrecedenceForUnary()
{
var op = new SubtractOperator();
Assert.AreEqual(OperatorPrecedence.UnaryMinus, op.GetPrecedence(null));
}