Use the suggested pytest way of marking tests

Author: jbasko

README.rst

@@ -108,17 +108,27 @@ Advanced Options
 Disable Shuffling In a Module
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-You can disable shuffling of tests within a single module by placing a pytest marker in the module:
+You can disable shuffling of tests within a single module or class by marking the module or class
+with ``random_order`` marker and passing ``disabled=True`` to it:
 
 ::
 
-    pytest.mark.random_order_disabled = True
+    pytestmark = pytest.mark.random_order(disabled=True)
 
     def test_number_one():
-        pass
+        assert True
 
     def test_number_two():
-        pass
+        assert True
+
+::
+
+    class MyTest(TestCase):
+        pytestmark = pytest.mark.random_order(disabled=True)
+
+        def test_number_one(self):
+            self.assertTrue(True)
+
 
 No matter what will be the bucket type for the test run, ``test_number_one`` will always run
 before ``test_number_two``.

pytest_random_order/shuffler.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 
 import collections
-import operator
 import random
 
 
@@ -97,19 +96,12 @@ def _get_set_of_item_ids(items):
         return s
 
 
-_is_random_order_disabled = operator.attrgetter('pytest.mark.random_order_disabled')
-
-
 def _disable(item):
-    try:
-        # In actual test runs, this is returned as a truthy instance of MarkDecorator even when you don't have
-        # set the marker. This is a hack.
-        is_disabled = _is_random_order_disabled(item.module)
-        if is_disabled and is_disabled is True:
-            # It is not enough to return just True because in case the shuffling
-            # is disabled on module, we must preserve the module unchanged
-            # even when the bucket type for this test run is say package or global.
-            return item.module.__name__
-    except AttributeError:
-        pass
+    marker = item.get_marker('random_order')
+    if marker:
+        is_disabled = marker.kwargs.get('disabled', False)
+        if is_disabled:
+            # A test item can only be disabled in its parent context -- where it is part of some order.
+            # We use parent name as the key so that all children of the same parent get the same disabled key.
+            return item.parent.name
     return False

setup.py

@@ -13,7 +13,7 @@ def read(fname):
 
 setup(
     name='pytest-random-order',
-    version='0.4.3',
+    version='0.5.0',
     author='Jazeps Basko',
     author_email='jazeps.basko@gmail.com',
     maintainer='Jazeps Basko',

tests/test_markers.py

@@ -9,11 +9,19 @@ def twenty_tests():
     return ''.join(code)
 
 
-@pytest.mark.parametrize('disabled', [True])
-def test_pytest_mark_random_order_disabled(testdir, twenty_tests, get_test_calls, disabled):
+@pytest.fixture
+def twenty_cls_tests():
+    code = []
+    for i in range(20):
+        code.append('\tdef test_b{}(self): self.assertTrue\n'.format(str(i).zfill(2)))
+    return ''.join(code)
+
+
+@pytest.mark.parametrize('disabled', [True, False])
+def test_marker_disables_random_order_in_module(testdir, twenty_tests, get_test_calls, disabled):
     testdir.makepyfile(
         'import pytest\n' +
-        'pytest.mark.random_order_disabled = {}\n'.format(disabled) +
+        ('pytestmark = pytest.mark.random_order(disabled={})\n'.format(disabled)) +
         twenty_tests
     )
 
@@ -26,3 +34,24 @@ def test_pytest_mark_random_order_disabled(testdir, twenty_tests, get_test_calls
         assert names == sorted_names
     else:
         assert names != sorted_names
+
+
+@pytest.mark.parametrize('disabled', [True, False])
+def test_marker_disables_random_order_in_class(testdir, twenty_cls_tests, get_test_calls, disabled):
+    testdir.makepyfile(
+        'import pytest\n\n' +
+        'from unittest import TestCase\n\n' +
+        'class MyTest(TestCase):\n' +
+        '\tpytestmark = pytest.mark.random_order(disabled={})\n'.format(disabled) +
+        twenty_cls_tests + '\n'
+    )
+
+    result = testdir.runpytest('--random-order-bucket=module', '-v')
+    result.assert_outcomes(passed=20)
+    names = [c.name for c in get_test_calls(testdir.runpytest())]
+    sorted_names = sorted(list(names))
+
+    if disabled:
+        assert names == sorted_names
+    else:
+        assert names != sorted_names