81 lines
3.5 KiB
C#
81 lines
3.5 KiB
C#
// 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.Data.Entity.Core.Common;
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using System.Data.Entity.Resources;
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using System.Data.Entity.SqlServer;
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using System.Data.Entity.SqlServerCompact;
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using System.Linq;
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using Xunit;
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public class DefaultProviderServicesResolverTests : TestBase
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{
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[Fact]
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public void The_provider_services_resolver_returns_SqlProviderServices_type_for_SqlClient_invariant_name()
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{
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Assert.Same(
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SqlProviderServices.Instance,
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new DefaultProviderServicesResolver().GetService<DbProviderServices>("System.Data.SqlClient"));
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}
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[Fact]
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public void The_provider_services_resolver_returns_SqlCeProviderServices_type_for_Sql_Compact_invariant_name()
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{
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Assert.Same(
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SqlCeProviderServices.Instance,
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new DefaultProviderServicesResolver().GetService<DbProviderServices>("System.Data.SqlServerCe.4.0"));
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}
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[Fact]
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public void The_provider_services_resolver_throws_for_an_unknown_provider_name()
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{
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Assert.Equal(
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Strings.EF6Providers_NoProviderFound("Don't.Come.Around.Here.No.More"),
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Assert.Throws<InvalidOperationException>(
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() => new DefaultProviderServicesResolver().GetService<DbProviderServices>("Don't.Come.Around.Here.No.More")).Message);
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}
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[Fact]
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public void The_provider_services_resolver_throws_for_an_empty_provider_name()
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{
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Assert.Equal(
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Strings.ProviderInvariantNotPassedToResolver,
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Assert.Throws<ArgumentException>(
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() => new DefaultProviderServicesResolver().GetService<DbProviderServices>(null)).Message);
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Assert.Equal(
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Strings.ProviderInvariantNotPassedToResolver,
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Assert.Throws<ArgumentException>(
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() => new DefaultProviderServicesResolver().GetService<DbProviderServices>("")).Message);
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Assert.Equal(
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Strings.ProviderInvariantNotPassedToResolver,
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Assert.Throws<ArgumentException>(
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() => new DefaultProviderServicesResolver().GetService<DbProviderServices>(" ")).Message);
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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<DbProviderServices>();
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var resolver = new DefaultProviderServicesResolver();
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ExecuteInParallel(() => bag.Add(resolver.GetService<DbProviderServices>("System.Data.SqlClient")));
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Assert.Equal(20, bag.Count);
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Assert.True(bag.All(c => SqlProviderServices.Instance == c));
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}
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}
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}
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}
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