public void Test_KeyRange_FromKey()
{
KeyRange range;
// "" => [ "", "\x00" )
range = KeyRange.FromKey(Slice.Empty);
Assert.That(range.Begin, Is.EqualTo(Slice.Empty));
Assert.That(range.End, Is.EqualTo(Slice.FromByteString("\x00")));
// "abc" => [ "abc", "abc\x00" )
range = KeyRange.FromKey(Slice.FromByteString("abc"));
Assert.That(range.Begin, Is.EqualTo(Slice.FromByteString("abc")));
Assert.That(range.End, Is.EqualTo(Slice.FromByteString("abc\x00")));
// "\xFF" => [ "\xFF", "\xFF\x00" )
range = KeyRange.FromKey(Slice.FromByteString("\xFF"));
Assert.That(range.Begin, Is.EqualTo(Slice.FromByteString("\xFF")));
Assert.That(range.End, Is.EqualTo(Slice.FromByteString("\xFF\x00")));
Assert.That(() => KeyRange.FromKey(Slice.Nil), Throws.InstanceOf <ArgumentException>());
}