GAE “Ran 0 tests” from unittest2

Question

I'm attempting to implement unit tests as per GAE's Python SDK Setting up a testing framework section.

Using their sample test runner and test, I receive the following output:

Ran 0 tests in 0.000s

OK

I have unittest2 installed and I also tried running the following commands, but all yielded the same response:

python -m unittest discover ~/foldername
python -m unittest2 discover ~/foldername

I tried adding the Basic example test file from Python docs, but also got the same result.

Tried all of above with and without an __init__.py in the unit test's folder.

What should I try next to debug this issue?

Update

My directory structure is as below:

├── app.yaml
├── myclass.py
├── bulkloader.yaml
├── myappname.py
├── index.yaml
├── testmodel.py
├── test_runner.py
└── unit_tests
    ├── demotestcase.py
    └── sample.py

With the contents of both tests from the above referenced links.

Answer 1

Usage: python -m unittest discover [options]

-s directory     Directory to start discovery ('.' default)
-p pattern       Pattern to match test files ('test*.py' default)