public async Task ExplainAsync_for_count_should_execute_an_ExplainOperation()
{
var countModel = new CountModel
{
Criteria = new BsonDocument("x", 1),
Hint = "funny",
Limit = 10,
MaxTime = TimeSpan.FromSeconds(20),
Skip = 30
};
var model = new ExplainModel(countModel)
{
Verbosity = ExplainVerbosity.ExecutionStats
};
await _subject.ExplainAsync(model, Timeout.InfiniteTimeSpan, CancellationToken.None);
var call = _operationExecutor.GetReadCall <BsonDocument>();
call.Operation.Should().BeOfType <ExplainOperation>();
var operation = (ExplainOperation)call.Operation;
operation.DatabaseNamespace.DatabaseName.Should().Be("foo");
operation.Command.Should().NotBeNull();
operation.Verbosity.Should().Be(model.Verbosity.ToCore());
}
public async Task ExplainAsync_for_find_should_execute_a_read_operation()
{
var findModel = new FindModel <BsonDocument>
{
Skip = 20
};
var model = new ExplainModel(findModel)
{
Verbosity = ExplainVerbosity.ExecutionStats
};
await _subject.ExplainAsync(model, Timeout.InfiniteTimeSpan, CancellationToken.None);
var call = _operationExecutor.GetReadCall <BsonDocument>();
call.Operation.Should().BeAssignableTo <IReadOperation <BsonDocument> >();
}
public async Task ExplainAsync_for_aggregate_should_execute_an_AggregateExplainOperation()
{
var pipeline = new[] { BsonDocument.Parse("{ $skip: 10 }") };
var aggregateModel = new AggregateModel <BsonDocument>(pipeline);
var model = new ExplainModel(aggregateModel)
{
Verbosity = ExplainVerbosity.ExecutionStats
};
await _subject.ExplainAsync(model, Timeout.InfiniteTimeSpan, CancellationToken.None);
var call = _operationExecutor.GetReadCall <BsonDocument>();
call.Operation.Should().BeOfType <AggregateExplainOperation>();
var operation = (AggregateExplainOperation)call.Operation;
operation.CollectionNamespace.FullName.Should().Be("foo.bar");
operation.Pipeline.Should().BeEquivalentTo(pipeline);
operation.AllowDiskUse.Should().Be(aggregateModel.AllowDiskUse);
operation.MaxTime.Should().Be(aggregateModel.MaxTime);
}
public Task <BsonDocument> ExplainAsync(ExplainModel model, TimeSpan?timeout, CancellationToken cancellationToken)
{
Ensure.IsNotNull(model, "model");
var commandType = model.Command.GetType();
if (commandType == typeof(CountModel))
{
return(ExplainCountAsync((CountModel)model.Command, model.Verbosity, timeout, cancellationToken));
}
if (commandType.IsGenericType)
{
var genericCommandDefinition = commandType.GetGenericTypeDefinition();
var genericArgument = commandType.GetGenericArguments()[0];
if (genericCommandDefinition == typeof(AggregateModel <>))
{
var explainAggregateMethod =
typeof(MongoCollectionImpl <TDocument>)
.GetMethod("ExplainAggregateAsync", BindingFlags.Instance | BindingFlags.NonPublic)
.MakeGenericMethod(genericArgument);
return((Task <BsonDocument>)explainAggregateMethod.Invoke(this, new object[] { model.Command, model.Verbosity, timeout, cancellationToken }));
}
if (genericCommandDefinition == typeof(FindModel <>))
{
var explainFindMethod =
typeof(MongoCollectionImpl <TDocument>)
.GetMethod("ExplainFindAsync", BindingFlags.Instance | BindingFlags.NonPublic)
.MakeGenericMethod(genericArgument);
return((Task <BsonDocument>)explainFindMethod.Invoke(this, new object[] { model.Command, model.Verbosity, timeout, cancellationToken }));
}
}
var message = string.Format("No explanation for {0} is defined.", model.Command.GetType().ToString());
throw new ArgumentException(message, "model.Command");
}