public void TestIterateWithBrackets()
{
RawExpression rawExpression1 = new RawExpression(0, "(x + y)(y^2 + 10) - (5)");
RawExpressionParser parser = new RawExpressionParser(rawExpression1);
List <RawMultiplier> multipliers = parser.Iterator().ToList();
Assert.AreEqual(multipliers.Count, 2);
Assert.AreEqual(multipliers[0].rawString, "(x + y)(y^2 + 10) ");
Assert.AreEqual(multipliers[1].rawString, "(5)");
rawExpression1 = new RawExpression(0, "((1 - z) + 4) + (((4))) + ((x))");
parser = new RawExpressionParser(rawExpression1);
multipliers = parser.Iterator().ToList();
Assert.AreEqual(multipliers.Count, 3);
Assert.AreEqual(multipliers[0].rawString, "((1 - z) + 4) ");
Assert.AreEqual(multipliers[1].rawString, "(((4))) ");
Assert.AreEqual(multipliers[2].rawString, "((x))");
}
public void TestIterate()
{
// things are going right
RawExpression rawExpression1 = new RawExpression(0, "-4 + 6 -9xy");
RawExpressionParser parser = new RawExpressionParser(rawExpression1);
List <RawMultiplier> multipliers = parser.Iterator().ToList();
Assert.AreEqual(multipliers.Count, 3);
Assert.AreEqual(multipliers[0].rawString, "4 ");
Assert.AreEqual(multipliers[1].rawString, "6 ");
Assert.AreEqual(multipliers[2].rawString, "9xy");
Assert.AreEqual(multipliers[0].coeff, -1);
Assert.AreEqual(multipliers[1].coeff, 1);
Assert.AreEqual(multipliers[2].coeff, -1);
Assert.AreEqual(multipliers[0].offset, 1);
Assert.AreEqual(multipliers[1].offset, 5);
Assert.AreEqual(multipliers[2].offset, 8);
parser = new RawExpressionParser(new RawExpression(0, "- +"));
// things are going wrong
try
{
multipliers = parser.Iterator().ToList();
Assert.Fail();
}
catch (ParseException e)
{
Assert.AreEqual(e.index, 2);
Assert.AreEqual(e.Message, "Summand symbols are expected here, not operand");
}
parser = new RawExpressionParser(new RawExpression(0, " +78z"));
try
{
multipliers = parser.Iterator().ToList();
Assert.Fail();
}
catch (ParseException e)
{
Assert.AreEqual(e.index, 1);
Assert.AreEqual(e.Message, "'+' sign is not expected to be here");
}
parser = new RawExpressionParser(new RawExpression(0, "78z + uh + - 9"));
try
{
multipliers = parser.Iterator().ToList();
Assert.Fail();
}
catch (ParseException e)
{
Assert.AreEqual(e.index, 11);
Assert.AreEqual(e.Message, "Summand symbols are expected here, not operand");
}
parser = new RawExpressionParser(new RawExpression(0, "78z + (dfdg) + 78x - "));
try
{
multipliers = parser.Iterator().ToList();
Assert.Fail();
}
catch (ParseException e)
{
Assert.AreEqual(e.index, 21);
Assert.AreEqual(e.Message, "Symbols are expected after operand");
}
}