Running Tests Randomly generate exception message Object reference not set to an instance of an object. #7280

9 Answer(s)

• 

  0

  liangshiwei created 6 months ago

  Support Team Fullstack Developer

  Hi,

  Maybe these links can help you

  https://support.abp.io/QA/Questions/4545/Unit-tests-fail-randomly-in-v701 https://github.com/abpframework/abp/issues/15389

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• 

  0

  alex.maiereanu@3sstudio.com created 6 months ago

  Hi liangshiwei,

  Thanks for the quick reply.

  Since we are running a new project, from template version 8.0.5, we already have all the proposed fixes implemented.

  This is the EF test project module:

  
  
  
  public class MyEntityFrameworkCoreTestModule : AbpModule
  {
  private SqliteConnection? \_sqliteConnection;
  
  public override void ConfigureServices(ServiceConfigurationContext context)
  {
      Configure<FeatureManagementOptions>(options =>
      {
          options.SaveStaticFeaturesToDatabase = false;
          options.IsDynamicFeatureStoreEnabled = false;
      });
      Configure<PermissionManagementOptions>(options =>
      {
          options.SaveStaticPermissionsToDatabase = false;
          options.IsDynamicPermissionStoreEnabled = false;
      });
      Configure<TextTemplateManagementOptions>(options =>
      {
          options.SaveStaticTemplatesToDatabase = false;
          options.IsDynamicTemplateStoreEnabled = false;
      });
      context.Services.AddAlwaysDisableUnitOfWorkTransaction();
  
      ConfigureInMemorySqlite(context.Services);
  
  }
  
  private void ConfigureInMemorySqlite(IServiceCollection services)
  {
      _sqliteConnection = CreateDatabaseAndGetConnection();
  
      services.Configure<AbpDbContextOptions>(options =>
      {
          options.Configure(context =>
          {
              context.DbContextOptions.UseSqlite(_sqliteConnection);
          });
      });
  }
  
  public override void OnApplicationShutdown(ApplicationShutdownContext context)
  {
      _sqliteConnection?.Dispose();
  }
  
  private static SqliteConnection CreateDatabaseAndGetConnection()
  {
      var connection = new SqliteConnection("Data Source=:memory:");
      connection.Open();
  
      var options = new DbContextOptionsBuilder<QQDbContext>()
          .UseSqlite(connection)
          .Options;
  
      using (var context = new QQDbContext(options))
      {
          context.GetService<IRelationalDatabaseCreator>().CreateTables();
      }
  
      return connection;
  }
  

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• 

  0

  liangshiwei created 6 months ago

  Support Team Fullstack Developer

  Hi,

  Have do I reproduce the problem? could you share a simple project with me? I will check it.

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• 

  0

  alex.maiereanu@3sstudio.com created 6 months ago

  Thats the issue

  I can't reproduce the issue consistently on my project, which has more than 100 tests and of course on a new sample project this is not appearing.

  My hunch is that this is starting to be a problem after X amount of tests are added.

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• 

  0

  liangshiwei created 6 months ago

  Support Team Fullstack Developer

  Hi,

  Sorry, But if I can't reproduce the problem, I can't help you.

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• 

  0

  alex.maiereanu@3sstudio.com created 6 months ago

  Hi

  I understand that it's difficult for you to move forward, but you also need to understand that we can't just share customer projects :D. What I'm asking from you is for help to see how we can better catch this exception and see what is going on. Is there a way to add better error handling? Would you have a hunch from where this originates?

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• 

  0

  liangshiwei created 6 months ago

  Support Team Fullstack Developer

  Hi,

  I remember this is an EF core problem, you can check this:

  https://github.com/abpframework/abp/issues/19065

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• 

  0

  alex.maiereanu@3sstudio.com created 6 months ago

  I'm trying out the fix from here: https://github.com/abpframework/abp/pull/19125

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• 

  0

  liangshiwei created 6 months ago

  Support Team Fullstack Developer

  okay

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