I have a directory tests that includes a lot of different tests named test_*.
I tried to run coverage run tests but it doesn't work.
How can I run a single command to coverage multiple files in the directory?
Here is a complete example with commands from the same PWD for all phases in one place. With a worked up example, I am also including the testing and the report part for before and after coverage is run. I ran the following steps and it worked all fine on osx/mojave.


Discover and run all tests in the test directory 


$ python -m unittest discover <directory_name>

Or
  Discover and run all tests in "directory" with tests having file name pattern *_test.py

$ python -m unittest discover -s <directory> -p '*_test.py'


run coverage for all modules


$ coverage run --source=./test -m unittest discover -s <directory>/


get the coverage report from the same directory - no need to cd.


$ coverage report -m

Notice in above examples that the test directory doesn't have to be
  named "test" and same goes for the test modules.
How to run coverage.py on a directory?