public void GetValidSubstringOrUnknownTest()
{
Assert.Equal("Unknown", InternalSDKUtils.GetValidSubstringOrUnknown("", 0, 0));
Assert.Equal("Unknown", InternalSDKUtils.GetValidSubstringOrUnknown("a b c", -1, 0));
Assert.Equal("Unknown", InternalSDKUtils.GetValidSubstringOrUnknown("a b c", 0, 10));
Assert.Equal("a_b_c", InternalSDKUtils.GetValidSubstringOrUnknown("a b c", 0, 5));
}
