public void TestZeroCount()
{
Assert.AreEqual(-1,
StringHelpers.IndexOf("aabbcc", "bb", 2, 0));
Assert.DoesNotThrow(
() => StringHelpers.IndexOf("aabbcc", "bb", 2, 0));
Assert.DoesNotThrow(
() => "aabbcc".IndexOf("ccaa", 2, 0));
}
public void TestNegativeIndex()
{
Assert.Throws <ArgumentOutOfRangeException>(
() => StringHelpers.IndexOf("aabbcc", "ccaa", 2, -3));
Assert.Throws <ArgumentOutOfRangeException>(
() => StringHelpers.IndexOf("aabbcc", "ccaa", -2, 3));
Assert.Throws <ArgumentOutOfRangeException>(
() => StringHelpers.IndexOf("aabbcc", "ccaa", -2, -3));
}
public void TestInvalidCount()
{
Assert.Throws <ArgumentOutOfRangeException>(
() => StringHelpers.IndexOf("aabbcc", "bb", 2, 5));
}
public void TestSimple()
{
Assert.AreEqual(2, StringHelpers.IndexOf("aabbcc", "bb", 0, 6));
}
public void TestEmptyText()
{
Assert.AreEqual(-1, StringHelpers.IndexOf("", "bb", 0, 0));
Assert.AreEqual(0, StringHelpers.IndexOf("", "", 0, 0));
Assert.AreEqual(0, "".IndexOf("", 0, 0));
}
public void TestEmptyValue()
{
Assert.AreEqual(2, StringHelpers.IndexOf("aabbcc", "", 2, 4));
}
public void TestValuePartiallyExists()
{
Assert.AreEqual(-1,
StringHelpers.IndexOf("aabbcc", "ccaa", 0, 6));
}
public void TestEnding()
{
Assert.AreEqual(4, StringHelpers.IndexOf("aabbcc", "cc", 0, 6));
}
public void TestInvalidValueLength()
{
Assert.AreEqual(-1,
StringHelpers.IndexOf("aabbcc", "xxxxxxx", 0, 6));
}
public void TestBeginning()
{
Assert.AreEqual(0, StringHelpers.IndexOf("aabbcc", "aa", 0, 6));
}
public void TestNegative()
{
Assert.AreEqual(-1, StringHelpers.IndexOf("aabbcc", "xx", 0, 6));
}
public void TestOutOfCountRange()
{
Assert.AreEqual(-1, StringHelpers.IndexOf("aab", "ab", 0, 2));
}
public void TestNullText()
{
Assert.Throws <ArgumentNullException>(
() => StringHelpers.IndexOf(null, "bb", 2, 3));
}
public void TestNullValue()
{
Assert.Throws <ArgumentNullException>(
() => StringHelpers.IndexOf("aabbcc", null, 2, 3));
}
