public void GetMatchesFindsNoMatchesForEmpty()
{
LookAheadExpression<char> expression = new LookAheadExpression<char> (m_any);
var matches = expression.GetMatches (EmptyList, 0);
Assert.AreEqual (0, matches.Count (), "Count");
}
public void GetMatchesFindsOneMatchForA()
{
LookAheadExpression<char> expression = new LookAheadExpression<char> (m_a);
string [] expectedValues = new [] {""};
int index = 0;
var list = AList;
var matches = expression.GetMatches (list, index).ToList ();
Assert.AreEqual (expectedValues.Length, matches.Count (), "Count");
for (int i = 0; i < expectedValues.Length; i++)
{
var match = matches [i];
var expected = expectedValues [i];
Assert.AreEqual (index, match.Index, "match.Index");
Assert.AreEqual (expected.Length, match.Length, "match.Length");
Assert.IsTrue (match.Success, "match.Success");
Assert.AreEqual (expected.Length, match.Items.Count, "match.Items.Count");
Assert.AreEqual (expected, new string (match.Items.ToArray ()), "match.Items");
}
}
public void ConstructorThrowArgumentNullExceptionForNullArray()
{
var expression = new LookAheadExpression<char> ((IExpression<char>) null);
}
public void ConstructorSucceeds()
{
var expression = new LookAheadExpression<char> (m_a);
Assert.IsFalse (expression.Negate);
}
public void IsMatchAt9Of_LookAhead_Greedy_Any_2_ForDigetsReturnsFalse()
{
int index = 9;
LookAheadExpression<char> expression = new LookAheadExpression<char> (new GreedyRepeatExpression<char> (m_any, 2));
int length = 0;
var list = DigetsList;
var ml = expression.IsMatchAt (list, index);
Assert.IsFalse (ml.Success, "isMatch");
Assert.AreEqual (length, ml.Length, "assertionLength");
}
public void GetPossibleMatchLengthsReturnsNoneForNone()
{
var expression =
new LookAheadExpression<char> (
new MockExpression<char> {AnyLength = false, PossibleMatchLengths = new int[0], SupportsLookBack = true});
var actual = expression.GetPossibleMatchLengths (100).ToList ();
Assert.AreEqual (0, actual.Count, "Count");
}
public void GetPossibleMatchLengthsReturns0ForTwoThreeFive()
{
var expression =
new LookAheadExpression<char> (
new MockExpression<char> {AnyLength = false, PossibleMatchLengths = new []{2,3,5}, SupportsLookBack = true});
var actual = expression.GetPossibleMatchLengths (100).ToList ();
Assert.AreEqual (1, actual.Count, "Count");
Assert.AreEqual (0, actual[0], "value at [0]");
}
