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bpo-30934: IDLE: Add Linux/MacOS coverage usage #2733

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bpo-30934: IDLE: Add Linux/MacOS coverage usage
mlouielu Jul 16, 2017
8dec3c0
Add unix system how to prepare coverage
mlouielu Jul 18, 2017
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27 changes: 26 additions & 1 deletion Lib/idlelib/idle_test/README.txt
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Expand Up @@ -164,7 +164,7 @@ python -m idlelib.idle_test.htest
5. Test Coverage

Install the coverage package into your Python 3.6 site-packages
directory. (Its exact location depends on the OS).
directory. (Its exact location depends on the OS).
> python3 -m pip install coverage
(On Windows, replace 'python3 with 'py -3.6' or perhaps just 'python'.)

Expand Down Expand Up @@ -215,3 +215,28 @@ rem Above opens new report; htmlcov\index.html displays report index
---
The second parameter was added for tests of module x not named test_x.
(There were several before modules were renamed, now only one is left.)


Coverage on Linux and MacOS
---------------------------

First, install coverage in virtualenv:

$ cd cpython # Goto cpython root directory
$ ./python -m venv venv # Create venv
$ source venv/bin/activate
$ (venv) python -m pip install coverage # Notice that is using `python`, not `./python`

then, using command line to manipulate like this:

$ (venv) python -m coverage run --source Lib/idlelib Lib/idlelib/idle_test/test_config.py
$ (venv) python -m coverage report --show-missing
$ (venv) python -m coverage html

You can replace `test_config.py` to the test you want to mesure, and the source
argument, you can set to specific file like `Lib/idlelib/config.py`.

If you don't want to do it in virtualenv, you can move coverage from venv to Lib:

$ cp -r venv/lib/python3.7/site-packages/coverage Lib/coverage
$ ./python -m coverage run --source Lib/idlellib Lib/idlelib/idle_test/test_config.py