About ABP vnext unit test error Cannot access a disposed context instance

[zhangxianchengvip]

I am writing unit tests based on ABP vnext, but it encountered an error. The following is the relevant code

DomainService：

    public async Task<Terminal> Create(string sn)
    {
        var any = await _repository.AnyAsync(new TerminalSnEqualSpec(sn));

        if (any)
        {
            throw new UserFriendlyException($"设备'{sn}'已存在!");
        }

        Terminal terminal = new(GuidGenerator.Create(), sn);

        return await _repository.InsertAsync(terminal, true);
    }

UnitTest:

public class TerminalManager_Tests : DeviceDomainTestBase
{
    private readonly TerminalManager _manager;

    public TerminalManager_Tests()
    {
        _manager = GetRequiredService<TerminalManager>();
    }

    [Fact]
    public async Task Should_CreateAsync()
    {
        string sn = "string";

        Terminal terminal = await _manager.Create(sn); ;
        terminal.ShouldNotBeNull();

        //await WithUnitOfWorkAsync(async () =>
        //{
        //    Terminal terminal = await _manager.Create(sn); ;
        //    terminal.ShouldNotBeNull();
        //});
    }
}

When the code is executed to var any=await_ Repository AnyAsync (new TerminalSnEqualSpec (sn)); An error will occur System.ObjectDisposedException : Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application. This may occur if you are calling 'Dispose' on the context instance, or wrapping it in a using statement. If you are using dependency injection, you should let the dependency injection container take care of disposing context instances. Object name: 'DeviceDbContext'.

[realLiangshiwei]

Try to use virtual.

[UnitOfWork]
public virtual Task<Terminal> Create(string sn)

[zhangxianchengvip]

Try to use virtual.

[UnitOfWork]
public virtual Task<Terminal> Create(string sn)

I tried using the following code

    await WithUnitOfWorkAsync(async () =>
    {
        Terminal terminal = await _manager.Create(sn); ;
        terminal.ShouldNotBeNull();
    });