I think you'll need to mock out the activate_venv when testing the s3 bits. Otherwise, cwrhelpers.py is gonna try to pull in lib/charms/layer/basic.py, which doesn't exist in the layer source. You'll only get that in the built charm.
$ make unit_test
...
py35 runtests: commands[0] | python3 -m nose ./unit_tests -v
test_bundle (test_bundlebuilder.TestBundlebuilder) ... ok
test_charm (test_bundlebuilder.TestBundlebuilder) ... ok
test_execute (test_bundlebuilder.TestBundlebuilder) ... ok
test_help (test_bundlebuilder.TestBundlebuilder) ... ok
test_raise (test_bundlebuilder.TestBundlebuilder) ... ok
Failure: ImportError (No module named 'charms.layer') ... ERROR
======================================================================
ERROR: Failure: ImportError (No module named 'charms.layer')
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/ubuntu/charms/layers/layer-cwr/.tox/py35/lib/python3.5/site-packages/nose/failure.py", line 39, in runTest
raise self.exc_val.with_traceback(self.tb)
File "/home/ubuntu/charms/layers/layer-cwr/.tox/py35/lib/python3.5/site-packages/nose/loader.py", line 418, in loadTestsFromName
addr.filename, addr.module)
File "/home/ubuntu/charms/layers/layer-cwr/.tox/py35/lib/python3.5/site-packages/nose/importer.py", line 47, in importFromPath
return self.importFromDir(dir_path, fqname)
File "/home/ubuntu/charms/layers/layer-cwr/.tox/py35/lib/python3.5/site-packages/nose/importer.py", line 94, in importFromDir
mod = load_module(part_fqname, fh, filename, desc)
File "/home/ubuntu/charms/layers/layer-cwr/.tox/py35/lib/python3.5/imp.py", line 234, in load_module
return load_source(name, filename, file)
File "/home/ubuntu/charms/layers/layer-cwr/.tox/py35/lib/python3.5/imp.py", line 172, in load_source
module = _load(spec)
File "<frozen importlib._bootstrap>", line 693, in _load
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 665, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "/home/ubuntu/charms/layers/layer-cwr/unit_tests/test_cwrhelpers.py", line 14, in <module>
from actions.cwrhelpers import get_s3_credentials
File "/home/ubuntu/charms/layers/layer-cwr/actions/cwrhelpers.py", line 9, in <module>
from charms.layer.basic import activate_venv # noqa: E402
ImportError: No module named 'charms.layer'
----------------------------------------------------------------------
Ran 6 tests in 2.112s
FAILED (errors=1)
ERROR: InvocationError: '/home/ubuntu/charms/layers/layer-cwr/.tox/py35/bin/python3 -m nose ./unit_tests -v'
____________________________________________________________________________________ summary ____________________________________________________________________________________
SKIPPED: py34: InterpreterNotFound: python3.4
ERROR: py35: commands failed
Makefile:22: recipe for target 'unit_test' failed
make: *** [unit_test] Error 1
I think you'll need to mock out the activate_venv when testing the s3 bits. Otherwise,
cwrhelpers.py
is gonna try to pull inlib/charms/layer/basic.py
, which doesn't exist in the layer source. You'll only get that in the built charm.