[Bug] Test env does not return result of workflow with child workflow

[dimroc]

What are you really trying to do?

I am trying to test a workflow that spins up one child workflow inside a future.

Describe the bug

1. Without a child workflow, the following code returns a result one can assert against.
2. With a child workflow, the following code has result nil, even if you try to wait for workflow handle. This happens often, but not all the time, implying a race condition?

However, in both scenarios, it's very evident that all workflows, child workflows, and activities are running.

      Temporalio::Testing::WorkflowEnvironment.start_time_skipping do |env|
        worker = Temporalio::Worker.new(
          client: env.client,
          task_queue: "tq-#{SecureRandom.uuid}",
          workflows: [
            AnalyzerUploadWorkflow,
            AnalyzerDocumentCreationWorkflow # Child workflow
          ],
          activities: [
            AnalyzerUploadActivities::BestPdfSplit,
            PdfImageActivities::Ingestion,
            AnalyzerDocument::CreationActivity
          ]
        )

        result = worker.run do
          env.client.execute_workflow(
            AnalyzerUploadWorkflow,
            analyzer_upload.id,
            id: workflow_id,
            task_queue: worker.task_queue
          )
        end

        expect(result).to be_present # <--- fails if AnalyzerUploadWorkflow is refactored to have child workflow
      end

Minimal Reproduction

TBD

Environment/Versions

• OS and processor: M3 MacBook
• Temporal Version: Ruby SDK 0.4
• Are you using Docker or Kubernetes or building Temporal from source? Temporal test suite

[cretz]

Can you provide a full standalone replication that includes the workflows? Feel free to make it as small as necessary to show that a workflow with a child workflow is not returning the value you expect. Also, can you confirm this same behavior exists with start_local instead of start_time_skipping (just to confirm this is not something specific to the time-skipping test server which could have an issue with child workflows in this case somehow)?

[dimroc]

I'm unable to reproduce this with a minimal example so I'll close for now.