Hi folks, especially our committers, Something may be wrong with our Travis CI tests, unless I misunderstood/missed something.
I'm checking *DockerOperator*, and some implementations inside are not making sense to me. But no CI tests ever failed due to it. When I check the log of the historical Travis CI, surprisingly, I found the test of DockerOperator never really run (you search any one of the recent Travis log). To prove this, I forked the latest master branch and tried to add "self .assertTrue(1 == 0)" into the code of tests/operators/docker_operator.py <https://github.com/XD-DENG/incubator-airflow/commit/2d6f47202349aa75b8d3e8e1631a285d2d75f1e7#diff-17e0452f4ce967751edfa767d46ae0ce> and tests/operators/python_operator.py <https://github.com/XD-DENG/incubator-airflow/commit/d7e4205f2f25dc2ea29356e4f43543f9b0bca963#diff-b5351e876d48957e2b64da5c16b0bd60>, which would for sure fail the tests. However, and as I suspected, the Travis CI passed ( https://github.com/XD-DENG/incubator-airflow/commits/patch-6). This means these two tests were never invoked during the Travis CI, and I believe these two are not the only tests affected. May anyone take a look into this? If I did misunderstand/miss something, kindly let me know. Many thanks! XD
