public void UnionWith_should_throw_when_withCollection_is_null()
{
var pipeline = new EmptyPipelineDefinition <BsonDocument>();
IMongoCollection <BsonDocument> withCollection = null;
var withPipeline = new EmptyPipelineDefinition <BsonDocument>();
var exception = Record.Exception(() => pipeline.UnionWith(withCollection, withPipeline));
var argumentNullException = exception.Should().BeOfType <ArgumentNullException>().Subject;
argumentNullException.ParamName.Should().Be("withCollection");
}
public void UnionWith_should_throw_when_TWith_is_not_the_same_with_TInput_and_withPipeline_is_null()
{
var pipeline = new EmptyPipelineDefinition <BsonDocument>();
var withCollection = Mock.Of <IMongoCollection <object> >(
coll => coll.CollectionNamespace == CollectionNamespace.FromFullName("db.test"));
var exception = Record.Exception(() => pipeline.UnionWith(withCollection, withPipeline: null));
var e = exception.Should().BeOfType <ArgumentException>().Subject;
e.Message.Should().StartWith("The withPipeline cannot be null when TWith != TInput. A pipeline is required to transform the TWith documents to TInput documents.");
e.ParamName.Should().Be("withPipeline");
}
public void UnionWith_should_add_expected_stage()
{
var pipeline = new EmptyPipelineDefinition <BsonDocument>();
var withCollection = Mock.Of <IMongoCollection <BsonDocument> >(
coll => coll.CollectionNamespace == CollectionNamespace.FromFullName("db.test"));
var withPipeline = new EmptyPipelineDefinition <BsonDocument>()
.AppendStage <BsonDocument, BsonDocument, BsonDocument>("{ $match : { b : 1 } }");
var result = pipeline.UnionWith(withCollection, withPipeline);
var stages = RenderStages(result, BsonDocumentSerializer.Instance);
stages[0].Should().Be("{ $unionWith : { coll : 'test', pipeline : [{ $match : { b : 1 } }] } }");
}