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LinqProviderV3Tests.cs
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LinqProviderV3Tests.cs
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/* Copyright 2010-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using FluentAssertions;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver.Linq;
using MongoDB.Driver.Linq.Linq3Implementation;
using Moq;
using Xunit;
namespace MongoDB.Driver.Tests.Linq.Linq3ImplementationTests
{
public class LinqProviderV3Tests
{
[Fact]
public void AsQueryable_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
var collection = Mock.Of<IMongoCollection<C>>();
var session = Mock.Of<IClientSessionHandle>();
var options = new AggregateOptions();
var result = subject.AsQueryable(collection, session, options);
var queryable = result.Should().BeOfType<MongoQuery<C, C>>().Subject;
var provider = queryable.Provider.Should().BeOfType<MongoQueryProvider<C>>().Subject;
provider._collection().Should().BeSameAs(collection);
provider._options().Should().BeSameAs(options);
}
[Fact]
public void TranslateExpressionToAggregateExpression_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
Expression<Func<C, int>> expression = c => c.X;
var serializerRegistry = BsonSerializer.SerializerRegistry;
var sourceSerializer = serializerRegistry.GetSerializer<C>();
var translationOptions = new ExpressionTranslationOptions();
var result = subject.TranslateExpressionToAggregateExpression(expression, sourceSerializer, serializerRegistry, translationOptions);
var expectedResult = LinqProviderAdapter.V2.TranslateExpressionToAggregateExpression(expression, sourceSerializer, serializerRegistry, translationOptions);
expectedResult.Should().Be("'$X'");
result.Should().Be(expectedResult);
}
[Fact]
public void TranslateExpressionToBucketOutputProjection_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
Expression<Func<C, int>> valueExpression = c => c.X;
Expression<Func<IGrouping<int, C>, int>> outputExpression = g => g.Count();
var serializerRegistry = BsonSerializer.SerializerRegistry;
var documentSerializer = serializerRegistry.GetSerializer<C>();
var translationOptions = new ExpressionTranslationOptions();
var result = subject.TranslateExpressionToBucketOutputProjection(valueExpression, outputExpression, documentSerializer, serializerRegistry, translationOptions);
var expectedResult = LinqProviderAdapter.V2.TranslateExpressionToBucketOutputProjection(valueExpression, outputExpression, documentSerializer, serializerRegistry, translationOptions);
expectedResult.Document.Should().Be("{ $sum : 1 }");
expectedResult.ProjectionSerializer.Should().BeOfType<Int32Serializer>();
result.Document.Should().Be(expectedResult.Document);
result.ProjectionSerializer.Should().BeOfType(expectedResult.ProjectionSerializer.GetType());
}
[Fact]
public void TranslateExpressionToField_with_untyped_lambda_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
LambdaExpression expression = (Expression<Func<C, int>>)(c => c.X);
var serializerRegistry = BsonSerializer.SerializerRegistry;
var documentSerializer = serializerRegistry.GetSerializer<C>();
var result = subject.TranslateExpressionToField(expression, documentSerializer, serializerRegistry);
var expectedResult = LinqProviderAdapter.V2.TranslateExpressionToField(expression, documentSerializer, serializerRegistry);
expectedResult.FieldName.Should().Be("X");
expectedResult.FieldSerializer.Should().BeOfType<Int32Serializer>();
result.FieldName.Should().Be(expectedResult.FieldName);
result.FieldSerializer.Should().BeOfType(expectedResult.FieldSerializer.GetType());
}
[Fact]
public void TranslateExpressionToField_with_typed_lambda_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
Expression<Func<C, int>> expression = c => c.X;
var serializerRegistry = BsonSerializer.SerializerRegistry;
var documentSerializer = serializerRegistry.GetSerializer<C>();
var result = subject.TranslateExpressionToField(expression, documentSerializer, serializerRegistry, allowScalarValueForArrayField: false);
var expectedResult = LinqProviderAdapter.V2.TranslateExpressionToField(expression, documentSerializer, serializerRegistry, allowScalarValueForArrayField: false);
expectedResult.FieldName.Should().Be("X");
expectedResult.FieldSerializer.Should().BeOfType<Int32Serializer>();
result.FieldName.Should().Be(expectedResult.FieldName);
result.FieldSerializer.Should().BeOfType(expectedResult.FieldSerializer.GetType());
}
[Fact]
public void TranslateExpressionToFilter_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
Expression<Func<C, bool>> expression = c => c.X == 0;
var serializerRegistry = BsonSerializer.SerializerRegistry;
var documentSerializer = serializerRegistry.GetSerializer<C>();
var result = subject.TranslateExpressionToFilter(expression, documentSerializer, serializerRegistry);
var expectedResult = LinqProviderAdapter.V2.TranslateExpressionToFilter(expression, documentSerializer, serializerRegistry);
expectedResult.Should().Be("{ X : 0 }");
result.Should().Be(expectedResult);
}
[Fact]
public void TranslateExpressionToFindProjection_should_return_expected_result()
{
var subject = LinqProviderAdapter.V3;
Expression<Func<C, int>> expression = c => c.X;
var serializerRegistry = BsonSerializer.SerializerRegistry;
var documentSerializer = serializerRegistry.GetSerializer<C>();
var result = subject.TranslateExpressionToFindProjection(expression, documentSerializer, serializerRegistry);
result.Document.Should().Be("{ _v : '$X', _id : 0 }");
result.ProjectionSerializer.ValueType.Should().Be(typeof(int));
}
[Fact]
public void TranslateExpressionToGroupProjection_should_throw()
{
WithAnonymousOutputType(g => new { count = g.Count() });
void WithAnonymousOutputType<TOutput>(Expression<Func<IGrouping<int, C>, TOutput>> groupExpression)
{
var subject = LinqProviderAdapter.V3;
Expression<Func<C, int>> idExpression = c => c.X;
var serializerRegistry = BsonSerializer.SerializerRegistry;
var documentSerializer = serializerRegistry.GetSerializer<C>();
var translationOptions = new ExpressionTranslationOptions();
var exception = Record.Exception(() => subject.TranslateExpressionToGroupProjection(idExpression, groupExpression, documentSerializer, serializerRegistry, translationOptions));
exception.Should().BeOfType<InvalidOperationException>();
}
}
[Fact]
public void TranslateExpressionToProjection_should_return_expected_result()
{
WithAnonymousOutputType(c => new { id = c.Id, x = c.X });
void WithAnonymousOutputType<TOutput>(Expression<Func<C, TOutput>> expression)
{
var subject = LinqProviderAdapter.V3;
var serializerRegistry = BsonSerializer.SerializerRegistry;
var inputSerializer = serializerRegistry.GetSerializer<C>();
var translationOptions = new ExpressionTranslationOptions();
var result = subject.TranslateExpressionToProjection(expression, inputSerializer, serializerRegistry, translationOptions);
var expectedResult = LinqProviderAdapter.V2.TranslateExpressionToProjection(expression, inputSerializer, serializerRegistry, translationOptions);
expectedResult.Document.Should().Be("{ id : '$_id', x : '$X', _id : 0 }");
expectedResult.ProjectionSerializer.ValueType.Should().Be(typeof(TOutput));
result.Document.Should().Be(expectedResult.Document);
result.ProjectionSerializer.ValueType.Should().Be(expectedResult.ProjectionSerializer.ValueType);
}
}
// nested types
public class C
{
public int Id { get; set; }
public int X { get; set; }
}
}
}