* load application from factory function
Use `ast.parse` to validate that the string passed to the CLI is either
an attribute name or a function call. Use `ast.literal_eval` to parse
any positional and keyword arguments to the function. Call the function
to get the real application.
Co-authored-by: Connor Brinton <connor.brinton@gmail.com>
* test coverage for util.import_app
* document app factory pattern
pytest.raises() returns exception info not the exception itself. They
changed implementation of exception info, so now .value property must be
used to get the exception instance and have proper output from str()
method.
https://github.com/pytest-dev/pytest/issues/5412
Signed-off-by: Martin Bašti <mbasti@redhat.com>
