catkin: catkin_make run_tests - can't import Python code

Not sure if this is my fault or a bug. I prepared a test repository with minimal example: https://github.com/ZdenekM/rostest-test-repo. The thing is that there are two packages - one with a custom message and the other with rostest where I would like to use the message. When I run test like this rostest test_package test.test it succeeds - but it fails when I run catkin_make run_tests (see whole output below - it seems that messages are generated) with ImportError: No module named my_msgs.msg. What might be wrong?

Scanning dependencies of target tests
Scanning dependencies of target clean_test_results_test_package
Scanning dependencies of target _my_msgs_generate_messages_check_deps_MyMessage
[  0%] Built target tests
Removing test result files from '/home/zdenal/test_workspace/build/test_results/test_package'
[  0%] Built target clean_test_results_test_package
[  0%] Built target _my_msgs_generate_messages_check_deps_MyMessage
Scanning dependencies of target my_msgs_generate_messages_cpp
Scanning dependencies of target my_msgs_generate_messages_py
Scanning dependencies of target my_msgs_generate_messages_lisp
[ 25%] [ 50%] [ 75%] Generating C++ code from my_msgs/MyMessage.msg
Generating Lisp code from my_msgs/MyMessage.msg
Generating Python from MSG my_msgs/MyMessage
[ 75%] Built target my_msgs_generate_messages_lisp
[100%] Generating Python msg __init__.py for my_msgs
[100%] Built target my_msgs_generate_messages_py
[100%] Built target my_msgs_generate_messages_cpp
Scanning dependencies of target _run_tests_test_package_rostest_test_test.test
-- run_tests.py: execute commands
  /opt/ros/indigo/share/rostest/cmake/../../../bin/rostest --pkgdir=/home/zdenal/test_workspace/src/rostest-test-repo/test_package --package=test_package --results-filename test_test.xml --results-base-dir /home/zdenal/test_workspace/build/test_results /home/zdenal/test_workspace/src/rostest-test-repo/test_package/test/test.test 
... logging to /home/zdenal/.ros/log/rostest-ZMThinkpad-30945.log
[ROSUNIT] Outputting test results to /home/zdenal/test_workspace/build/test_results/test_package/rostest-test_test.xml
Traceback (most recent call last):
  File "/home/zdenal/test_workspace/src/rostest-test-repo/test_package/test/test.py", line 8, in <module>
    from my_msgs.msg import MyMessage
ImportError: No module named my_msgs.msg
testtest_package_test ... FAILURE!
FAILURE: test [test_package_test] did not generate test results
  File "/usr/lib/python2.7/unittest/case.py", line 331, in run
    testMethod()
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rostest/runner.py", line 164, in fn
    self.assert_(os.path.isfile(test_file), "test [%s] did not generate test results"%test_name)
  File "/usr/lib/python2.7/unittest/case.py", line 424, in assertTrue
    raise self.failureException(msg)
--------------------------------------------------------------------------------

[ROSTEST]-----------------------------------------------------------------------

[testtest_package_test][failed]

SUMMARY
 * RESULT: FAIL
 * TESTS: 0
 * ERRORS: 0
 * FAILURES: 1

ERROR: The following tests failed to run:
 * testtest_package_test

About this issue

Original URL
State: closed
Created 7 years ago
Comments: 31 (13 by maintainers)

Commits related to this issue

Source setup before running tests. Tests that depend on the artifact generated in build process don't run without sourcing the setup in the workspace (probably hitting https://github.com/ros/catkin/is... — committed to plusone-robotics/industrial_ci by 130s 6 years ago

Most upvoted comments

Oh I was hit by this problem as well, and just wanted to confirm what ZdenekM experienced: the first solution did not work, the second did. A work-around yes, but a really annoying one.

krixkrix on Aug 8, 2017

Thank you for your detailed answer. The first approach does not work for me but the second does - great! Maybe, it would be nice to document this somewhere.

ZdenekM on Jan 30, 2017

Please see #986 for a proposed patch which avoid the need for the mentioned workarounds.

dirk-thomas on Jan 28, 2019

Sure, using @ZdenekM’s repo https://github.com/ZdenekM/rostest-test-repo, here are my steps to reproduce the failure:

Open a new shell without any ROS scripts sourced or environment variables set and run the following commands (or paste to a script and run it all at once)

mkdir -p test_ws/src
cd test_ws/src
git clone https://github.com/ZdenekM/rostest-test-repo
cd ../
. /opt/ros/kinetic/setup.sh
catkin_make
. devel/setup.sh
catkin_make run_tests

Expected Result: The test.py script errors with ImportError: No module named my_msgs.msg

And to reproduce the success, do the following after the above:

Comment out the PYTHONPATH= line in build/catkin_generated/setup_cached.sh
Run catkin_make run_tests

Expected result: Test passes without errors.

chachi on Apr 16, 2018