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public static RandomRegexp ( |
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// LUCENENET specific - De-nested RandomAcceptedStrings
/// <summary>
/// Return a random NFA/DFA for testing. </summary>
public static Automaton RandomAutomaton(Random random)
{
// get two random Automata from regexps
Automaton a1 = (new RegExp(AutomatonTestUtil.RandomRegexp(random), RegExpSyntax.NONE)).ToAutomaton();
if (random.NextBoolean())
{
a1 = BasicOperations.Complement(a1);
}
Automaton a2 = (new RegExp(AutomatonTestUtil.RandomRegexp(random), RegExpSyntax.NONE)).ToAutomaton();
if (random.NextBoolean())
{
a2 = BasicOperations.Complement(a2);
}
// combine them in random ways
switch (random.Next(4))
{
case 0:
return(BasicOperations.Concatenate(a1, a2));
case 1:
return(BasicOperations.Union(a1, a2));
case 2:
return(BasicOperations.Intersection(a1, a2));
default:
return(BasicOperations.Minus(a1, a2));
}
}
public virtual void TestRegexps()
{
int num = AtLeast(500);
for (int i = 0; i < num; i++)
{
AssertAutomaton((new RegExp(AutomatonTestUtil.RandomRegexp(Random()), RegExp.NONE)).ToAutomaton());
}
}
public void TestRandomRegexes()
{
int num = AtLeast(250);
for (int i = 0; i < num; i++)
{
AssertAutomaton((new RegExp(AutomatonTestUtil.RandomRegexp(Random()), RegExpSyntax.NONE)).ToAutomaton());
}
}
public virtual void TestRegexps()
{
// we generate aweful regexps: good for testing.
// but for preflex codec, the test can be very slow, so use less iterations.
int num = Codec.Default.Name.Equals("Lucene3x", StringComparison.Ordinal) ? 100 * RandomMultiplier : AtLeast(1000);
for (int i = 0; i < num; i++)
{
string reg = AutomatonTestUtil.RandomRegexp(Random);
if (Verbose)
{
Console.WriteLine("TEST: regexp=" + reg);
}
AssertSame(reg);
}
}
public virtual void TestGetRandomAcceptedString()
{
int ITER1 = AtLeast(100);
int ITER2 = AtLeast(100);
for (int i = 0; i < ITER1; i++)
{
RegExp re = new RegExp(AutomatonTestUtil.RandomRegexp(Random), RegExpSyntax.NONE);
Automaton a = re.ToAutomaton();
Assert.IsFalse(BasicOperations.IsEmpty(a));
RandomAcceptedStrings rx = new RandomAcceptedStrings(a);
for (int j = 0; j < ITER2; j++)
{
int[] acc = null;
try
{
acc = rx.GetRandomAcceptedString(Random);
string s = UnicodeUtil.NewString(acc, 0, acc.Length);
Assert.IsTrue(BasicOperations.Run(a, s));
}
catch (Exception /*t*/)
{
Console.WriteLine("regexp: " + re);
if (acc != null)
{
Console.WriteLine("fail acc re=" + re + " count=" + acc.Length);
for (int k = 0; k < acc.Length; k++)
{
Console.WriteLine(" " + acc[k].ToString("x"));
}
}
throw; // LUCENENET: CA2200: Rethrow to preserve stack details (https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2200-rethrow-to-preserve-stack-details)
}
}
}
}
public virtual void TestGetRandomAcceptedString()
{
int ITER1 = AtLeast(100);
int ITER2 = AtLeast(100);
for (int i = 0; i < ITER1; i++)
{
RegExp re = new RegExp(AutomatonTestUtil.RandomRegexp(Random()), RegExp.NONE);
Automaton a = re.ToAutomaton();
Assert.IsFalse(BasicOperations.IsEmpty(a));
AutomatonTestUtil.RandomAcceptedStrings rx = new AutomatonTestUtil.RandomAcceptedStrings(a);
for (int j = 0; j < ITER2; j++)
{
int[] acc = null;
try
{
acc = rx.GetRandomAcceptedString(Random());
string s = UnicodeUtil.NewString(acc, 0, acc.Length);
Assert.IsTrue(BasicOperations.Run(a, s));
}
catch (Exception t)
{
Console.WriteLine("regexp: " + re);
if (acc != null)
{
Console.WriteLine("fail acc re=" + re + " count=" + acc.Length);
for (int k = 0; k < acc.Length; k++)
{
Console.WriteLine(" " + acc[k].ToString("x"));
}
}
throw t;
}
}
}
}