public void TestConstructor()
{
var settings = new MongoDatabaseSettings();
Assert.AreEqual(null, settings.Credentials);
Assert.AreEqual(GuidRepresentation.Unspecified, settings.GuidRepresentation);
Assert.AreEqual(null, settings.ReadPreference);
#pragma warning disable 618
Assert.AreEqual(null, settings.SafeMode);
#pragma warning restore
Assert.AreEqual(null, settings.WriteConcern);
}