public void SetVisitorProperty_throws_ArgumentNullException_when_key_is_null()
{
var sut = new MongoTrackingDataSource(collectionMock.Object);
Action test = () => sut.SetVisitorProperty("visitorId", null, "value");
Assert.Throws <ArgumentNullException>(test);
}
public void SetVisitorProperty_updates_document(object expected)
{
var visitorId = ObjectId.GenerateNewId().ToString();
var key = "queryString";
collection.InsertOne(GetInitialDocument());
var sut = new MongoTrackingDataSource(collection);
sut.SetVisitorProperty(visitorId, key, expected);
var retrievedDocument = FindDocument(visitorId);
var actual = retrievedDocument[key].Value;
Assert.Equal(expected, actual);
}