New subject: [freeipa PR#3783][closed] Migrate xunit/unittest/nose tests to Pytest

11 Oct 2019


      URL: https://github.com/freeipa/freeipa/pull/3783
Author: stanislavlevin
 Title: #3783: Migrate xunit-style setups to fixtures
Action: opened
PR body:
"""
This converts `setup*`/`teardown*` functions/methods to the
powerfull pytest fixtures:
```
The purpose of test fixtures is to provide a fixed baseline upon
which tests can reliably and repeatedly execute. pytest fixtures
offer dramatic improvements over the classic xUnit style of
setup/teardown functions:
- fixtures have explicit names and are activated by declaring their
 use from test functions, modules, classes or whole projects.
- fixtures are implemented in a modular manner, as each fixture name
 triggers a fixture function which can itself use other fixtures.
- fixture management scales from simple unit to complex functional
 testing, allowing to parametrize fixtures and tests according to
 configuration and component options, or to re-use fixtures across
 function, class, module or whole test session scopes.
```
One of the transition patterns is as follows:
```diff
class TestFooBar(XMLRPC_test):
-    @classmethod
-    def setup_class(cls):
-        super(TestFooBar, cls).setup_class()
+    @pytest.fixture(autouse=True, scope="class")
+    def foo_bar_setup(self, request, xmlrpc_setup):
+        cls = request.cls
         cls.beforemethod()
-    @classmethod
-    def teardown_class(cls):
-        cls.aftermethod()
-        super(TestFooBar, cls).teardown_class()
+        def fin():
+            cls.aftermethod()
+        request.addfinalizer(fin)
```
To achieve predictable results for initialization and destroy of
Pytest fixtures, ones have to employ the fixtures' interdependencies.
This is the first part of the work to remove the mixing of test idioms in the
IPA test suite.
Related: https://pagure.io/freeipa/issue/7989
"""
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/3783/head:pr3783
git checkout pr3783

[freeipa PR#3783][opened] Migrate xunit-style setups to fixtures