91 lines
3.6 KiB
C#
91 lines
3.6 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 DatabaseInitializerResolverTests : TestBase
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{
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[Fact]
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public void GetService_returns_null_for_non_database_initializer_type()
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{
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Assert.Null(CreateResolver().GetService<DbContext>());
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}
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[Fact]
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public void GetService_returns_null_for_database_initializer_generic_type_definition()
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{
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Assert.Null(CreateResolver().GetService(typeof(IDatabaseInitializer<>)));
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}
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[Fact]
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public void GetService_returns_null_for_context_type_that_has_not_been_registered()
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{
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Assert.Null(CreateResolver().GetService(typeof(IDatabaseInitializer<DbContext>)));
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}
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[Fact]
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public void GetService_returns_registered_initializer()
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{
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var initializer = new Mock<IDatabaseInitializer<FakeContext1>>().Object;
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Assert.Same(initializer, CreateResolver(initializer).GetService(typeof(IDatabaseInitializer<FakeContext1>)));
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}
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[Fact]
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public void SetInitializer_overrides_initializer_previously_set()
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{
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var resolver = CreateResolver();
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var initializer = new Mock<IDatabaseInitializer<FakeContext1>>().Object;
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resolver.SetInitializer(typeof(FakeContext1), initializer);
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Assert.Same(initializer, resolver.GetService(typeof(IDatabaseInitializer<FakeContext1>)));
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}
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private static DatabaseInitializerResolver CreateResolver(IDatabaseInitializer<FakeContext1> initializer = null)
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{
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var resolver = new DatabaseInitializerResolver();
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resolver.SetInitializer(typeof(FakeContext1), initializer ?? new Mock<IDatabaseInitializer<FakeContext1>>().Object);
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resolver.SetInitializer(typeof(FakeContext2), new Mock<IDatabaseInitializer<FakeContext2>>().Object);
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return resolver;
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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<IDatabaseInitializer<FakeContext1>>();
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var resolver = new DatabaseInitializerResolver();
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var initializer = new Mock<IDatabaseInitializer<FakeContext1>>().Object;
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ExecuteInParallel(
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() =>
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{
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resolver.SetInitializer(typeof(FakeContext1), initializer);
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bag.Add(resolver.GetService<IDatabaseInitializer<FakeContext1>>());
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});
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Assert.Equal(20, bag.Count);
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Assert.True(bag.All(c => initializer == c));
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}
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}
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public class FakeContext1 : DbContext
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{
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}
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public class FakeContext2 : DbContext
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{
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}
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}
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}
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