Testing mocker issues

[Eldad Corem Livneh]

Did you read the migration guide?

• I have read the whole migration guide

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Potential Commit/PR that introduced the regression

No response

Versions

9.0.0

Describe the regression

After upgrading, I can't create a testing module with an import to an existing module that has a Typeorm dependency. I am seeing the below error:
TypeError: dataSource.entityMetadatas.find is not a function

The error comes from this line:
const enitityMetadata = dataSource.entityMetadatas.find((meta) => meta.target === entity); in typeorm.provider.js

I have an app with a MySql DB and there's no option to do a "mock" connection. I've tried but Typeorm keeps trying to connect. Maybe I am missing something?

Minimum reproduction code

const moduleRef = await Test.createTestingModule({
        imports: [ModuleIWantToTest],
        controllers: [MockController],
      })
        .useMocker(() => createMock())
        .compile();

Expected behavior

Testing module is created and I can use the internal services with the mocker

Other

Tested on both 9.0.0 and 9.0.1

[Kamil Mysliwiec]

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