91 lines
4.0 KiB
C#
91 lines
4.0 KiB
C#
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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
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namespace System.Data.Entity.Config
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{
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using System.Collections.Concurrent;
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using System.Linq;
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using Moq;
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using Xunit;
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public class CompositeResolverTests : TestBase
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{
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[Fact]
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public void Get_returns_result_of_first_resolver_if_result_is_non_null()
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{
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var mockFirstResolver = new Mock<IDbDependencyResolver>();
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var mockSecondResolver = new Mock<IDbDependencyResolver>();
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var karl = new Mock<IPilkington>().Object;
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mockFirstResolver.Setup(m => m.GetService(typeof(IPilkington), "Karl")).Returns(karl);
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Assert.Same(
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karl,
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new CompositeResolver<IDbDependencyResolver, IDbDependencyResolver>(
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mockFirstResolver.Object, mockSecondResolver.Object).GetService<IPilkington>("Karl"));
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mockFirstResolver.Verify(m => m.GetService(typeof(IPilkington), "Karl"), Times.Once());
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mockSecondResolver.Verify(m => m.GetService(It.IsAny<Type>(), It.IsAny<string>()), Times.Never());
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}
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[Fact]
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public void Get_returns_result_of_second_resolver_if_result_of_first_is_null()
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{
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var mockFirstResolver = new Mock<IDbDependencyResolver>();
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var mockSecondResolver = new Mock<IDbDependencyResolver>();
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var karl = new Mock<IPilkington>().Object;
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mockSecondResolver.Setup(m => m.GetService(typeof(IPilkington), "Karl")).Returns(karl);
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Assert.Same(
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karl,
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new CompositeResolver<IDbDependencyResolver, IDbDependencyResolver>(
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mockFirstResolver.Object, mockSecondResolver.Object).GetService<IPilkington>("Karl"));
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mockFirstResolver.Verify(m => m.GetService(typeof(IPilkington), "Karl"), Times.Once());
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mockSecondResolver.Verify(m => m.GetService(typeof(IPilkington), "Karl"), Times.Once());
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}
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[Fact]
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public void Get_returns_null_if_both_resolvers_return_null()
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{
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var mockFirstResolver = new Mock<IDbDependencyResolver>();
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var mockSecondResolver = new Mock<IDbDependencyResolver>();
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Assert.Null(
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new CompositeResolver<IDbDependencyResolver, IDbDependencyResolver>(
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mockFirstResolver.Object, mockSecondResolver.Object).GetService<IPilkington>("Karl"));
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mockFirstResolver.Verify(m => m.GetService(typeof(IPilkington), "Karl"), Times.Once());
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mockSecondResolver.Verify(m => m.GetService(typeof(IPilkington), "Karl"), Times.Once());
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}
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public interface IPilkington
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{
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}
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/// <summary>
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/// This test makes calls from multiple threads such that we have at least some chance of finding threading
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/// issues. As with any test of this type just because the test passes does not mean that the code is
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/// correct. On the other hand if this test ever fails (EVEN ONCE) then we know there is a problem to
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/// be investigated. DON'T just re-run and think things are okay if the test then passes.
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/// </summary>
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[Fact]
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public void GetService_can_be_accessed_from_multiple_threads_concurrently()
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{
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for (var i = 0; i < 30; i++)
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{
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var bag = new ConcurrentBag<IPilkington>();
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var karl1 = new Mock<IPilkington>().Object;
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var resolver = new CompositeResolver<IDbDependencyResolver, IDbDependencyResolver>(
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new SingletonDependencyResolver<IPilkington>(karl1),
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new SingletonDependencyResolver<IPilkington>(new Mock<IPilkington>().Object));
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ExecuteInParallel(() => bag.Add(resolver.GetService<IPilkington>()));
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Assert.Equal(20, bag.Count);
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Assert.True(bag.All(c => karl1 == c));
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}
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}
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}
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}
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