Testing Plugins
Plugins are code that needs to be tested just like any other code. However, testing a change to a testing tool is a little tricky. When we developed the plugin code in Writing Your Own Plugins, we tested it manually by using a sample test file, running pytest against it, and looking at the output to make sure it was right. We can do the same thing in an automated way using a plugin called pytester that ships with pytest but is disabled by default.
Our test directory for pytest-nice has two files: conftest.py and test_nice.py. To use pytester, we need to add just one line to conftest.py:
| | """pytester is needed for testing plugins.""" |
| | pytest_plugins = 'pytester' |
This turns on the pytester ...
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