How can I inject something into ClassDataSource?

[bazarniy]

Hello!

I have CustomWebApplicationFactory and inject it into test class with SharedType.PerClass.
I have a class with pool of testcontainers and it must be SharedType.PerAssembly.

CustomWebApplicationFactory need the pool in InitializeAsync. I've tried to add ClassDataSource into CustomWebApplicationFactory but get compilation error because of requred property in ClassDataSource.

So is there some way to inject something into ClassDataSource class with TUnit? It will be pretty if I can add SharedType.PerAssembly into SharedType.PerClass etc

[bazarniy]

I've tried https://tunit.dev/docs/test-lifecycle/dependency-injection. Singletone shares between test classes. But scope and transient are unique in every test. Looks like scope should be unique per class...

[bazarniy]

I've tried IClassConstructor + ILastTestInClassEventReceiver but looks like there are new instance of IClassConstructor for each test, so I cannot share data between them.

[bazarniy]

I've added to class ClassDataSource(Shared = SharedType.PerAssembly) property and [ClassDataSource(Shared = SharedType.PerClass)] property. In T2 I've added T property with getter and setter. I try to use Before(Class) method, but it is static and I don't see my test class properties to call T2.T = T. I try to use Before(Test) method, but when it calls T and T2 test class properties not injected yet

[bazarniy]

Looks like I've found solution. In InitializeAsync method I can see all injected guys here: TestContext.Current!.TestDetails.TestClassInjectedPropertyArguments

But it looks like crutch :(

[thomhurst]

@bazarniy Try upgrading to v0.24 and adding a property with a ClassDataSource inside your object

[ClassDataSource<MyFactory>]
public class MyTests(MyFactory factory)
{
    ...
}

public class MyFactory : IAsyncInitializer
{
    [ClassDataSource<MyServer>]
    public required MyServer Server { get; init; }
    ...
}

public class MyServer : IAsyncInitializer
{
    ...
}

[bazarniy]

@thomhurst Looks like there are a bug with dispose in 0.24. I have this state now:

[ClassDataSource<MyFactory>(Shared = SharedType.PerClass)]
[NotInParallel]
public class MyTests1(MyFactory factory)
{
    ...
}

[ClassDataSource<MyFactory>(Shared = SharedType.PerClass)]
[NotInParallel]
public class MyTests2(MyFactory factory)
{
    ...
}

public class MyFactory : IAsyncInitializer, IAsyncDisposable
{
    [ClassDataSource<MyServer>(Shared = SharedType.PerAssembly)]
    public required MyServer Server { get; init; }
    ...
}

public class MyServer : IAsyncInitializer, IAsyncDisposable
{
    ...
}

I run MyTests1 and MyTests2 in one session:

• MyServer initializes 1 time (expected)
• MyFactory initializes 2 times (expected)

When ONE test class finished:

• MyFactory disposes 1 time (expected)
• MyServer disposes 1 time (unexpected!)

Expected: MyServer.Dispose calls only after finishing all tests

When I inject Myserver(Shared = SharedType.PerAssembly) into MyTests1 and MyTests2 and calls it from factory through TestContext.Current!.TestDetails (like in comment below) it disposes as expected