CSHARP-797: More unit tests.

Author: rstam

MongoDB.DriverUnitTests/Builders/QueryBuilderTests.cs

@@ -29,14 +29,12 @@ public class QueryBuilderTests
     {
         private MongoServer _server;
         private MongoDatabase _database;
-        private MongoDatabase _adminDatabase;
         private MongoServerInstance _primary;
 
         [TestFixtureSetUp]
         public void TestFixtureSetup()
         {
             _server = Configuration.TestServer;
-            _adminDatabase = _server.GetDatabase("admin");
             _database = Configuration.TestDatabase;
             _primary = _server.Primary;
         }

MongoDB.DriverUnitTests/Builders/UpdateBuilderTests.cs

@@ -17,6 +17,7 @@
 using System.Collections.Generic;
 using MongoDB.Bson;
 using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Driver;
 using MongoDB.Driver.Builders;
 using NUnit.Framework;
 
@@ -69,11 +70,19 @@ private class C
             public int X = 0;
         }
 
+        private MongoCollection<BsonDocument> _collection;
+
         private C _a = new C { X = 1 };
         private C _b = new C { X = 2 };
         private BsonDocument _docA1 = new BsonDocument("a", 1);
         private BsonDocument _docA2 = new BsonDocument("a", 2);
 
+        [TestFixtureSetUp]
+        public void TestFixtureSetup()
+        {
+            _collection = Configuration.TestCollection;
+        }
+
         [Test]
         public void TestAddToSet()
         {
@@ -840,6 +849,18 @@ public void TestReplace()
             Assert.AreEqual(expected, update.ToJson());
         }
 
+        [Explicit]
+        [Test]
+        public void TestReplaceWithInvalidFieldName()
+        {
+            _collection.Drop();
+            _collection.Insert(new BsonDocument { { "_id", 1 }, { "x", 1 } });
+
+            var query = Query.EQ("_id", 1);
+            var update = Update.Replace(new BsonDocument { { "_id", 1 }, { "$x", 1 } });
+            Assert.Throws<BsonSerializationException>(() => { _collection.Update(query, update); });
+        }
+
         [Test]
         public void TestReplace_Typed()
         {