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)); }