private void WriteBson(BsonWriter writer, Regex regex)
{
// Regular expression - The first cstring is the regex pattern, the second
// is the regex options string. Options are identified by characters, which
// must be stored in alphabetical order. Valid options are 'i' for case
// insensitive matching, 'm' for multiline matching, 'x' for verbose mode,
// 'l' to make \w, \W, etc. locale dependent, 's' for dotall mode
// ('.' matches everything), and 'u' to make \w, \W, etc. match unicode.
string options = null;
if (HasFlag(regex.Options, RegexOptions.IgnoreCase))
options += "i";
if (HasFlag(regex.Options, RegexOptions.Multiline))
options += "m";
if (HasFlag(regex.Options, RegexOptions.Singleline))
options += "s";
options += "u";
if (HasFlag(regex.Options, RegexOptions.ExplicitCapture))
options += "x";
writer.WriteRegex(regex.ToString(), options);
}
public void WriteRegexPlusContent()
{
MemoryStream ms = new MemoryStream();
BsonWriter writer = new BsonWriter(ms);
writer.WriteStartObject();
writer.WritePropertyName("regex");
writer.WriteRegex("abc", "i");
writer.WritePropertyName("test");
writer.WriteRegex(string.Empty, null);
writer.WriteEndObject();
byte[] expected = MiscellaneousUtils.HexToBytes("1A-00-00-00-0B-72-65-67-65-78-00-61-62-63-00-69-00-0B-74-65-73-74-00-00-00-00");
CollectionAssert.AreEquivalent(expected, ms.ToArray());
}