public void ShouldPushUpdatedDocumensWithDbDocumentRevisionWithPut()
		{
			var expectedDoc = new JsonObject(docB2WithoutRev);

			int stage = 0;

			var extractorMock = new Mock<IDesignDocumentExtractor>();
			extractorMock
				.Setup(e => e.Extract(It.IsAny<IEnumerable<JsonObject>>()))
				.Returns(
					(IEnumerable<JsonObject> _) => {
						switch (stage++)
						{
							case 0: return CreateDesignDocumentMap(docB);
							case 1: return CreateDesignDocumentMap(expectedDoc);
							default: throw new Exception();
						}
					});

			var handler = GetNoResultsMessageHandler();
			var engine = new Engine(
				extractorMock.Object, 
				Mock.Of<IDesignDocumentAssembler>(a => a.Assemble() == CreateDesignDocumentMap(docB2WithoutRev)),
				handler
			);

			engine.PushIfChanged(new Uri("http://example.com/db1"));

			Assert.Equal("http://example.com/db1/_bulk_docs", handler.Requests[1].RequestUri.ToString());
			Assert.Equal("POST", handler.Requests[1].Method.ToString());
			
			expectedDoc["_rev"] = docB["_rev"];
			Assert.Equal("{\"docs\":[" + expectedDoc + "]}", handler.RequestBodies[1], new JsonStringCompairer());
		}