Anyone started using xUnit 2.0.0 and RavenDb.Embedded (for unit tests)?

[Justin A]

Has anyone started using xUnit 2.0 with RavenDb.Embedded in a unit test situation?

I've just migrated a project (slowly) over to it and just added my first library that is using RavenDb.Embedded and i'm getting some really random and weird errors now.

Now before the HR krew says: Please make a repo, etc ... I'm just checking to see if there _is_ an issue .. and not just more stupid code _I've_ made.

Why am i thinking there's an issue with xUnit 2.0 and RavenDB.Embedded? xUnit has a much better Parallel story that's been really fixed up .. so I'm wondering if this new sparkle-magic is now highlighting some deficiencies in RDB.Embedded?

I'm wondering if one of the tests has locked something .. so the rest of the tests just fall over and cry...

Here's some sample errors from one xUnit-run-session (i'm running around 40 tests, where about 6 are RavenDb.Embedded tests).

NOTE: 

  <package id="RavenDB.Client" version="3.0.3599" targetFramework="net451" />

  <package id="RavenDB.Database" version="3.0.3599" targetFramework="net451" />

  <package id="RavenDB.Embedded" version="3.0.3599" targetFramework="net451" /> 

1.

Exception doesn't have a stacktrace

System.IO.IOException

The process cannot access the file 'C:\Projects\Hornet\Code\Hornet.Tests\bin\Debug\Assemblies\Lucene.Net.dll' because it is being used by another process.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)

   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)

   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)

   at Raven.Database.Server.AssemblyExtractor.Extract(Assembly assemblyToExtractFrom, IEnumerable`1 assembliesToExtract, String location) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\AssemblyExtractor.cs: line 116

   at Raven.Database.Server.AssemblyExtractor.ExtractEmbeddedAssemblies(InMemoryRavenConfiguration configuration) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\AssemblyExtractor.cs: line 49

   at Owin.AppBuilderExtensions.UseRavenDB(IAppBuilder app, RavenDBOptions options) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\AppBuilderExtensions.cs: line 79

2.

System.Reflection.ReflectionTypeLoadExceptionUnable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

   at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)

   at System.Reflection.RuntimeModule.GetTypes()

   at System.Reflection.Assembly.GetTypes()

   at System.ComponentModel.Composition.Hosting.AssemblyCatalog.get_InnerCatalog()

   at System.ComponentModel.Composition.Hosting.AssemblyCatalog.GetExports(ImportDefinition definition)

   at Raven.Database.Plugins.Catalogs.FilteredCatalog.GetExports(ImportDefinition definition) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Plugins\Catalogs\FilteredCatalog.cs: line 41

   at System.ComponentModel.Composition.Hosting.AggregateCatalog.GetExports(ImportDefinition definition)

   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.InternalGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.AggregateExportProvider.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExports(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.CompositionContainer.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportedValuesCore(String contractName)

   at Raven.Database.DocumentDatabase.DocumentDatabaseInitializer.ExecuteAlterConfiguration() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\DocumentDatabase.cs: line 1146

   at Raven.Database.DocumentDatabase..ctor(InMemoryRavenConfiguration configuration, TransportState recievedTransportState) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\DocumentDatabase.cs: line 111

   at Raven.Database.Server.RavenDBOptions..ctor(InMemoryRavenConfiguration configuration, DocumentDatabase db) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDBOptions.cs: line 54

   at Raven.Database.Server.OwinHttpServer..ctor(InMemoryRavenConfiguration config, DocumentDatabase db, Boolean useHttpServer, Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\OwinHttpServer.cs: line 24

3.

System.NullReferenceExceptionObject reference not set to an instance of an object.

   at System.Collections.Generic.HashSet`1.AddIfNotPresent(T value)

   at Raven.Abstractions.Logging.LogManager.RegisterTarget() in c:\Builds\RavenDB-Stable-3.0\Raven.Abstractions\Logging\LogManager.cs: line 66

   at Raven.Database.Server.RavenDBOptions..ctor(InMemoryRavenConfiguration configuration, DocumentDatabase db) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDBOptions.cs: line 54

   at Raven.Database.Server.OwinHttpServer..ctor(InMemoryRavenConfiguration config, DocumentDatabase db, Boolean useHttpServer, Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\OwinHttpServer.cs: line 24

   at Raven.Server.RavenDbServer.Initialize(Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDbServer.cs: line 106

   at Raven.Database.Client.EmbeddedDocumentStore.Initialize() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Client\EmbeddedDocumentStore.cs: line 225

   at Raven.Client.Embedded.EmbeddableDocumentStore.Initialize() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Client\EmbeddableDocumentStore.cs: line 138

4.

System.Reflection.ReflectionTypeLoadExceptionUnable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

   at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)

   at System.Reflection.RuntimeModule.GetTypes()

   at System.Reflection.Assembly.GetTypes()

   at System.ComponentModel.Composition.Hosting.AssemblyCatalog.get_InnerCatalog()

   at System.ComponentModel.Composition.Hosting.AssemblyCatalog.GetExports(ImportDefinition definition)

   at Raven.Database.Plugins.Catalogs.FilteredCatalog.GetExports(ImportDefinition definition) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Plugins\Catalogs\FilteredCatalog.cs: line 41

   at System.ComponentModel.Composition.Hosting.AggregateCatalog.GetExports(ImportDefinition definition)

   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.InternalGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.AggregateExportProvider.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExports(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.CompositionContainer.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportedValuesCore(String contractName)

   at Raven.Database.DocumentDatabase.DocumentDatabaseInitializer.ExecuteAlterConfiguration() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\DocumentDatabase.cs: line 1146

   at Raven.Database.DocumentDatabase..ctor(InMemoryRavenConfiguration configuration, TransportState recievedTransportState) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\DocumentDatabase.cs: line 111

   at Raven.Database.Server.RavenDBOptions..ctor(InMemoryRavenConfiguration configuration, DocumentDatabase db) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDBOptions.cs: line 54

   at Raven.Database.Server.OwinHttpServer..ctor(InMemoryRavenConfiguration config, DocumentDatabase db, Boolean useHttpServer, Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\OwinHttpServer.cs: line 24

   at Raven.Server.RavenDbServer.Initialize(Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDbServer.cs: line 106

   at Raven.Database.Client.EmbeddedDocumentStore.Initialize() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Client\EmbeddedDocumentStore.cs: line 225

   at Raven.Client.Embedded.EmbeddableDocumentStore.Initialize() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Client\EmbeddableDocumentStore.cs: line 138

cheers!

-me-

[Justin A]

Oh - I forgot to add. those 4 tests (above) pass/work when i run them individually, one at a time. (which is why i'm thinking it's a Parallel issue).

[Oren Eini (Ayende Rahien)]

Can you use the latest unstable, that should fix this issue

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On Mon, Apr 6, 2015 at 1:58 PM, Justin A <jus...@adler.com.au> wrote:

Oh - I forgot to add. those 4 tests (above) pass/work when i run them individually, one at a time. (which is why i'm thinking it's a Parallel issue).

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[Justin A]

I'll try and give that a go later on today. Cheers Oren!

[Justin A]

Hi Oren,

I haven't had any luck trying to update to the latest unstable.

1. I thought unstables were on MyGet but failed to find anything there that's _relevant_. (last update was 4 months ago).

2. I found v 3660 on NuGet ... so I tried to update the test helpers, first.. but ..

3. RavenDb.Database a pre-release on NuGet ... ??

4. RavenDb Embedded is now flagged as obsolete? and should be replaced by RavenDb.Database (which I can't seem to pull down) ... ?

[Oren Eini (Ayende Rahien)]

It isn't pre-release.

Also, try -DependencyVersion Highest

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[Justin A]

http://www.nuget.org/packages/RavenDB.Database/

^ there's no version 3660 for RavenDb.Database there ... is that right?

[Oren Eini (Ayende Rahien)]

We got this error from Nuget.

Failed to process request. 'Save changes unavailable: the gallery is currently in read only mode, with limited service. Please try again later.'

We'll try it again

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Office: +972-4-622-7811 l Fax: +972-153-4-622-7811

 

On Tue, Apr 7, 2015 at 10:53 AM, Justin A <jus...@adler.com.au> wrote:

http://www.nuget.org/packages/RavenDB.Database/

^ there's no version 3660 for RavenDb.Database there ... is that right?

--

[Idsa]

I experience the same problem of not being able to run all the tests (while they work individually) with XUnit/Resharper. I am confused what is the real problem? Is it XUnit or RavenDb? Going unstable with RavenDb isn't really an option for me.

вторник, 7 апреля 2015 г., 15:20:18 UTC+6 пользователь Oren Eini написал:

[Justin A]

Hi HR,

I'm still getting some bizarre errors when using RavenDb and xunit.

If i run the tests all at once, then some of them error. But when i run each of the tests that are erroring, individually ... then each one passes. So the issue is like when I'm running my tests all at the same time - maybe something new with xunit 2.0?

Here's an example stack trace ...

System.Reflection.ReflectionTypeLoadExceptionUnable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

   at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)

   at System.Reflection.RuntimeModule.GetTypes()

   at System.Reflection.Assembly.GetTypes()

   at System.ComponentModel.Composition.Hosting.AssemblyCatalog.get_InnerCatalog()

   at System.ComponentModel.Composition.Hosting.AssemblyCatalog.GetExports(ImportDefinition definition)

   at Raven.Database.Plugins.Catalogs.FilteredCatalog.GetExports(ImportDefinition definition) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Plugins\Catalogs\FilteredCatalog.cs: line 41

   at System.ComponentModel.Composition.Hosting.AggregateCatalog.GetExports(ImportDefinition definition)

   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.InternalGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.CatalogExportProvider.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.AggregateExportProvider.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExports(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.CompositionContainer.GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.TryGetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition, ref IEnumerable`1 exports)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExports(ImportDefinition definition, AtomicComposition atomicComposition)

   at System.ComponentModel.Composition.Hosting.ExportProvider.GetExportedValuesCore(String contractName)

   at Raven.Database.DocumentDatabase.DocumentDatabaseInitializer.ExecuteAlterConfiguration() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\DocumentDatabase.cs: line 1210

   at Raven.Database.DocumentDatabase..ctor(InMemoryRavenConfiguration configuration, TransportState recievedTransportState) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\DocumentDatabase.cs: line 112

   at Raven.Database.Server.RavenDBOptions..ctor(InMemoryRavenConfiguration configuration, DocumentDatabase db) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDBOptions.cs: line 57

   at Raven.Database.Server.OwinHttpServer..ctor(InMemoryRavenConfiguration config, DocumentDatabase db, Boolean useHttpServer, Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\OwinHttpServer.cs: line 24

   at Raven.Server.RavenDbServer.Initialize(Action`1 configure) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\RavenDbServer.cs: line 107

   at Raven.Database.Client.EmbeddedDocumentStore.Initialize() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Client\EmbeddedDocumentStore.cs: line 225

   at Raven.Client.Embedded.EmbeddableDocumentStore.Initialize() in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Client\EmbeddableDocumentStore.cs: line 138

   at Raven.Tests.Helpers.RavenTestBase.NewDocumentStore(Boolean runInMemory, String requestedStorage, ComposablePartCatalog catalog, String dataDir, Boolean enableAuthentication, String activeBundles, Nullable`1 port, AnonymousUserAccessMode anonymousUserAccessMode, Action`1 configureStore, String databaseName, IEnumerable`1 indexes, IEnumerable`1 transformers, IEnumerable`1 seedData) in c:\Builds\RavenDB-Stable-3.0\Raven.Tests.Helpers\RavenTestBase.cs: line 251

   at Hornet.Tests.Services.AccountServiceFacts.DeleteAsyncNewFacts.<GivenAnExistingAccount_DeleteAsync_DeletesTheAccount>d__27.MoveNext() in AccountServiceFacts.cs: line 143

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Xunit.Sdk.TestInvoker`1.<>c__DisplayClassc.<<InvokeTestMethodAsync>b__9>d__e.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Xunit.Sdk.ExecutionTimer.<AggregateAsync>d__0.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Xunit.Sdk.ExceptionAggregator.<RunAsync>d__0.MoveNext() in c:\TeamCity\buildAgent\work\74856245f07a90f0\src\xunit.core\Sdk\ExceptionAggregator.cs: line 90

 <package id="RavenDB.Client" version="3.0.3690" targetFramework="net451" />

  <package id="RavenDB.Database" version="3.0.3690" targetFramework="net451" />

  <package id="RavenDB.Tests.Helpers" version="3.0.3690" targetFramework="net451" />

  <package id="xunit.abstractions" version="2.0.0" targetFramework="net451" />

  <package id="xunit.core" version="2.0.0" targetFramework="net451" />

  <package id="xunit.extensibility.core" version="2.0.0" targetFramework="net451" />

And the unit test is nothing hard core at all..

[Fact]

public async Task GivenAnExistingAccount_DeleteAsync_DeletesTheAccount()

{

    // Arrange.

    var seedData = new IEnumerable[] { FakeAccounts.CreateFakeAccounts() };

    var documentStore = NewDocumentStore(seedData: seedData);

    var service = new AccountService();

    // Act.

    using (var asyncDocumentSession = documentStore.OpenAsyncSession())

    {

        await service.DeleteAsync(1, asyncDocumentSession);

        await asyncDocumentSession.SaveChangesAsync();

    }

    // Assert.

    using (var asyncDocumentSession = documentStore.OpenAsyncSession())

    {

        var account = await asyncDocumentSession.LoadAsync<Account>("accounts/1");

        account.ShouldBe(null);

    }

}

I'm expecting the response: Can you provide a repo? I could provide my source code privately if this issue isn't already raised as a known issue OR there's no suggestions based on the error report, above.

[Oren Eini (Ayende Rahien)]

Retrieve the LoaderExceptions property for more information.

What does it says?

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[Justin A]

Ah - got it.. 

{"Could not load file or assembly 'System.Net.Http.Formatting, Version=5.2.2.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.":"System.Net.Http.Formatting, Version=5.2.2.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"}

Ring any bells?

[Oren Eini (Ayende Rahien)]

Can't you catch the exception and output the value?

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On Tue, Jun 2, 2015 at 2:55 PM, Justin A <jus...@adler.com.au> wrote:

That's the problem :( i can't do that when i debug it .... it works :/

[Oren Eini (Ayende Rahien)]

Not really, no. Can you try this on a stand alone project? And can you make sure that you have the right dlls referenced?

What I _think_ is going on is that we are trying to load the same dll twice in different contextes, which causes... issues.

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--

[Justin A]

Ok - I've replicated in. I can zip up this sln and email it somewhere?

this is the scenario I created to repo this.

1) create my projects and classes etc...

2) create my first test class. it looks like this...

public class AccountServiceFacts

{

    public class StoreAsyncFacts : RavenTestBase

    {

        // SNIP   

    }

    public class DeleteAsyncNewFacts : RavenTestBase

    {

        // SNIP

    }

}

3) Run all the tests ... ALL GREEN (so far so good).

4) copy and paste this ENTIRE file.

5) in this copied file rename the class to AccountServiceFactsCopy so it can compile. Now run all tests. BOOM.

[Oren Eini (Ayende Rahien)]

Great, can you send it to sup...@ravendb.net ? Or just create an issue in the issue tracker?

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[Justin A]

Created a private issue in the issue tracker :)

[Oren Eini (Ayende Rahien)]

It is so private, I don't see it :-)

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On Wed, Jun 3, 2015 at 9:28 AM, Justin A <jus...@adler.com.au> wrote:

Created a private issue in the issue tracker :)

--

[Justin A]

It's priv to Developers and Me.

it's issue TMP-184

(does that help?)

[Oren Eini (Ayende Rahien)]

Yes, we just didn't get a notification on that.

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--

[Russell Troywest]

I've just run into the same problem after upgrading RavenDb and XUnit.

From what I can tell it's an issue to do with running unit tests that use the EmbeddedDocumentStore in parallel . If you tag your test assembly that uses the EmbeddedDocumentStore with:

[assembly: Xunit.CollectionBehavior(DisableTestParallelization = true)]

the tests will probably run happily (at least they did for me). It's because XUnit V2 parallelises the running of unit tests by default, whereas previously this was not the case.

[Justin A]

Fix? nope.

Workaround? yep.

Why? Your tests are running one at a time :/ try doing that with hundreds or thousands.

Needs to be parallel :/

[Oren Eini (Ayende Rahien)]

Yes, we fixed that issue in the latest unstable

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