// constructors
/// <summary>
/// Initializes a new instance of the <see cref="ChangeStreamDocument{TDocument}" /> class.
/// </summary>
/// <param name="resumeToken">The resume token.</param>
/// <param name="operationType">Type of the operation.</param>
/// <param name="collectionNamespace">Namespace of the collection.</param>
/// <param name="documentKey">The document key.</param>
/// <param name="updateDescription">The update description.</param>
/// <param name="fullDocument">The full document.</param>
public ChangeStreamDocument(
BsonDocument resumeToken,
ChangeStreamOperationType operationType,
CollectionNamespace collectionNamespace,
BsonDocument documentKey,
ChangeStreamUpdateDescription updateDescription,
TDocument fullDocument)
{
_resumeToken = Ensure.IsNotNull(resumeToken, nameof(resumeToken));
_operationType = operationType;
_collectionNamespace = collectionNamespace; // can be null when operationType is Invalidate
_documentKey = documentKey; // can be null
_updateDescription = updateDescription; // can be null
_fullDocument = fullDocument; // can be null
}
public void Serialize_should_have_expected_result_when_value_is_null()
{
var subject = CreateSubject();
ChangeStreamUpdateDescription value = null;
string result;
using (var textWriter = new StringWriter())
using (var writer = new JsonWriter(textWriter))
{
var context = BsonSerializationContext.CreateRoot(writer);
subject.Serialize(context, value);
result = textWriter.ToString();
}
result.Should().Be("null");
}
public void UpdateDescription_should_return_expected_result(string updatedFieldsJson, string[] removedFields)
{
var updatedFields = BsonDocument.Parse(updatedFieldsJson);
var updateDescriptionDocument = new BsonDocument {
{ "updatedFields", updatedFields }, { "removedFields", new BsonArray(removedFields) }
};
var backingDocument = new BsonDocument {
{ "other", 1 }, { "updateDescription", updateDescriptionDocument }
};
var subject = CreateSubject(backingDocument: backingDocument);
var result = subject.UpdateDescription;
var expectedResult = new ChangeStreamUpdateDescription(updatedFields, removedFields);
result.Should().Be(expectedResult);
}
public void Serialize_should_have_expected_result()
{
var subject = CreateSubject();
var value = new ChangeStreamUpdateDescription(
new BsonDocument("f", 1),
new [] { "f" });
var expectedResult = "{ \"updatedFields\" : { \"f\" : 1 }, \"removedFields\" : [\"f\"] }";
string result;
using (var textWriter = new StringWriter())
using (var writer = new JsonWriter(textWriter))
{
var context = BsonSerializationContext.CreateRoot(writer);
subject.Serialize(context, value);
result = textWriter.ToString();
}
result.Should().Be(expectedResult);
}
public void Serialize_should_have_expected_result()
{
var subject = CreateSubject();
var value = new ChangeStreamUpdateDescription(
new BsonDocument("f", 1),
new[] { "f" },
BsonArray.Create(new[] { BsonDocument.Parse("{ field : 'arrayForSubdiff', newSize : 2 }") }));
var expectedResult = "{ \"updatedFields\" : { \"f\" : 1 }, \"removedFields\" : [\"f\"], \"truncatedArrays\" : [{ \"field\" : \"arrayForSubdiff\", \"newSize\" : 2 }] }";
string result;
using (var textWriter = new StringWriter())
using (var writer = new JsonWriter(textWriter))
{
var context = BsonSerializationContext.CreateRoot(writer);
subject.Serialize(context, value);
result = textWriter.ToString();
}
result.Should().Be(expectedResult);
}
public void UpdateDescription_should_return_expected_result(string updatedFieldsJson, string[] removedFields, string truncatedArrays)
{
var updatedFields = BsonDocument.Parse(updatedFieldsJson);
var truncatedArraysBsonArray = truncatedArrays != null?BsonSerializer.Deserialize <BsonArray>(truncatedArrays) : null;
var updateDescriptionDocument = new BsonDocument
{
{ "updatedFields", updatedFields },
{ "removedFields", new BsonArray(removedFields) },
{ "truncatedArrays", truncatedArraysBsonArray, truncatedArraysBsonArray != null }
};
var backingDocument = new BsonDocument {
{ "other", 1 }, { "updateDescription", updateDescriptionDocument }
};
var subject = CreateSubject(backingDocument: backingDocument);
var result = subject.UpdateDescription;
var expectedResult = new ChangeStreamUpdateDescription(updatedFields, removedFields, truncatedArraysBsonArray);
result.Should().Be(expectedResult);
}
// public methods
/// <inheritdoc />
protected override ChangeStreamDocument <TDocument> DeserializeValue(BsonDeserializationContext context, BsonDeserializationArgs args)
{
var reader = context.Reader;
CollectionNamespace collectionNamespace = null;
BsonDocument documentKey = null;
TDocument fullDocument = default(TDocument);
BsonDocument resumeToken = null;
ChangeStreamOperationType? operationType = null;
ChangeStreamUpdateDescription updateDescription = null;
reader.ReadStartDocument();
while (reader.ReadBsonType() != 0)
{
var fieldName = reader.ReadName();
switch (fieldName)
{
case "_id":
resumeToken = BsonDocumentSerializer.Instance.Deserialize(context);
break;
case "ns":
collectionNamespace = DeserializeCollectionNamespace(reader);
break;
case "documentKey":
documentKey = BsonDocumentSerializer.Instance.Deserialize(context);
break;
case "fullDocument":
if (reader.CurrentBsonType == BsonType.Null)
{
reader.ReadNull();
fullDocument = default(TDocument);
}
else
{
fullDocument = _documentSerializer.Deserialize(context);
}
break;
case "operationType":
operationType = __operationTypeSerializer.Deserialize(context);
break;
case "updateDescription":
updateDescription = __updateDescriptionSerializer.Deserialize(context);
break;
default:
throw new FormatException($"Invalid field name: \"{fieldName}\".");
}
}
reader.ReadEndDocument();
return(new ChangeStreamDocument <TDocument>(
resumeToken,
operationType.Value,
collectionNamespace,
documentKey,
updateDescription,
fullDocument));
}