Flask application with Celery using Test-Driven Development (TDD):

/myapp
    /job_queue
        __init__.py
        /src
            /main
                __init__.py
                app.py
                celery_config.py
            /tasks
                __init__.py
                mytasks.py
        /tests
            __init__.py
            /unit
                __init__.py
                test_app.py
                test_tasks.py
            /integration
                __init__.py
                test_app_integration.py
    run.py
    run_celery.py
    requirements.txt

Here's what each file/directory is for:

• /myapp: The outer myapp directory is the root of your project.
• /myapp/job_queue: This is the actual Python module of your application.
• /myapp/job_queue/src: This directory holds your source code.
• /myapp/job_queue/src/main: This directory includes the main Flask application and Celery configuration.
• /myapp/job_queue/src/tasks: This directory includes the Celery tasks.
• /myapp/job_queue/tests: This directory includes all the test cases.
• /myapp/job_queue/tests/unit: This directory includes all the unit tests.
• /myapp/job_queue/tests/integration: This directory includes all the integration tests.
• run.py: This script runs your application.
• run_celery.py: This script runs your Celery worker.
• requirements.txt: This file lists all of the Python packages that your app depends on.

You could run your tests using a library like pytest with the following command:

pytest myapp/tests

This structure separates the main application and tasks from the test suite, providing a clean organization for a TDD project.