// Constructor
public LinearPolynomial(string linearpolynomial)
{
// Determine count of unknown members
_UnknownCount = 0;
// Linear polynomial patterns
// in canonical form
string leftSidePattern =
@"\G((\-?|\+?)((\d+\.{1}\d+)|\d*))[a-z]{1}";
string rigthSidePattern =
@"(\-?((\d+\.{1}\d+)|\d+))\Z";
// Try to parse input string
PolynomialParser polyParser =
new PolynomialParser(leftSidePattern, rigthSidePattern);
List<string> members = polyParser.TryParse(linearpolynomial);
try
{
// Format result values
if (members.Count != 0)
{
foreach (string item in members)
{
if (item.Contains("!!!"))
_Members.Add("!!!",
item.Substring(0, item.Length - 3));
else
if (item.Length == 1)
_Members.Add(item, "1");
else
_Members.Add(item[item.Length - 1].ToString(),
item.Substring(0, item.Length - 1));
}
List<string> keys = new List<string>();
foreach (var item in _Members)
if (item.Value == "+" || item.Value == "-")
keys.Add(item.Key);
foreach (string key in keys)
_Members[key] = _Members[key] + "1";
// Determine count of unknown members
_UnknownCount = _Members.Count - 1;
}
}
catch (Exception)
{
_Members.Clear();
_UnknownCount = 0;
}
}
public void TryParseValidStr_2_roots(string validInputStr,
string root_1, string root_2, string free)
{
// Linear polynomial patterns
string leftSidePattern =
@"\G((\-?|\+?)((\d+\.{1}\d+)|\d*))[a-z]{1}";
string rigthSidePattern =
@"(\-?((\d+\.{1}\d+)|\d+))\Z";
PolynomialParser polyParser =
new PolynomialParser(leftSidePattern, rigthSidePattern);
// Actual results of parsing
List<string> actualResult =
polyParser.TryParse(validInputStr);
// Asserts
Assert.AreEqual(3, actualResult.Count);
Assert.AreEqual(root_1, actualResult[0]);
Assert.AreEqual(root_2, actualResult[1]);
Assert.AreEqual(free, actualResult[2]);
}
public void TryParseNotValidStr(string notValidInputStr)
{
// Linear polynomial patterns
string leftSidePattern =
@"\G((\-?|\+?)((\d+\.{1}\d+)|\d*))[a-z]{1}";
string rigthSidePattern =
@"(\-?((\d+\.{1}\d+)|\d+))\Z";
PolynomialParser polyParser =
new PolynomialParser(leftSidePattern, rigthSidePattern);
// Actual results of parsing
List<string> actualResult =
polyParser.TryParse(notValidInputStr);
// Assert
Assert.AreEqual(0, actualResult.Count);
}
