public static string RandomSubString(Random random, int wordLength, bool simple)
{
if (wordLength == 0)
{
return("");
}
int evilness = TestUtil.NextInt32(random, 0, 20);
StringBuilder sb = new StringBuilder();
while (sb.Length < wordLength)
{
;
if (simple)
{
sb.Append(random.NextBoolean() ? TestUtil.RandomSimpleString(random, wordLength) : TestUtil.RandomHtmlishString(random, wordLength));
}
else
{
if (evilness < 10)
{
sb.Append(TestUtil.RandomSimpleString(random, wordLength));
}
else if (evilness < 15)
{
Assert.AreEqual(0, sb.Length); // we should always get wordLength back!
sb.Append(TestUtil.RandomRealisticUnicodeString(random, wordLength, wordLength));
}
else if (evilness == 16)
{
sb.Append(TestUtil.RandomHtmlishString(random, wordLength));
}
else if (evilness == 17)
{
// gives a lot of punctuation
sb.Append(TestUtil.RandomRegexpishString(random, wordLength));
}
else
{
sb.Append(TestUtil.RandomUnicodeString(random, wordLength));
}
}
}
if (sb.Length > wordLength)
{
sb.Length = wordLength;
if (char.IsHighSurrogate(sb[wordLength - 1]))
{
sb.Length = wordLength - 1;
}
}
if (random.Next(17) == 0)
{
// mix up case
string mixedUp = TestUtil.RandomlyRecaseString(random, sb.ToString());
Assert.True(mixedUp.Length == sb.Length, "Lengths are not the same: mixedUp = " + mixedUp + ", length = " + mixedUp.Length + ", sb = " + sb + ", length = " + sb.Length);
return(mixedUp);
}
else
{
return(sb.ToString());
}
}