Declarative tests: Switch to pytest

Provide a local pytest plugin to generate tests.

The Declarative tests can now only be run with pytest

https://fedorahosted.org/freeipa/ticket/4610

Reviewed-By: Tomas Babej <tbabej@redhat.com>

ipatests/pytest.ini

@@ -7,6 +7,7 @@
 [pytest]
 python_classes = test_ Test
 addopts = --doctest-modules
+          -p ipatests.pytest_plugins.declarative
             # Ignore files for doc tests.
             # TODO: ideally, these should all use __name__=='__main__' guards
           --ignore=setup.py

ipatests/pytest_plugins/declarative.py

@@ -0,0 +1,47 @@
+# Authors:
+#   Petr Viktorin <pviktori@redhat.com>
+#
+# Copyright (C) 2014  Red Hat
+# see file 'COPYING' for use and warranty information
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Pytest plugin for Declarative tests"""
+
+
+def pytest_generate_tests(metafunc):
+    """Generates Declarative tests"""
+    if 'declarative_test_definition' in metafunc.fixturenames:
+        name = metafunc.cls.__name__
+        tests = []
+        descriptions = []
+        for i, test in enumerate(metafunc.cls.tests):
+            if callable(test):
+                description = '%d: %s' % (
+                    i,
+                    test.__name__,  # test is not a dict. pylint: disable=E1103
+                )
+            else:
+                description = '%d: %s: %s' % (i,
+                                              test['command'][0],
+                                              test.get('desc', ''))
+                test = dict(test)
+                test['nice'] = description
+            tests.append(test)
+            descriptions.append(description)
+        metafunc.parametrize(
+            ['index', 'declarative_test_definition'],
+            enumerate(tests),
+            ids=descriptions,
+        )

ipatests/test_xmlrpc/xmlrpc_test.py

@@ -278,27 +278,15 @@ class Declarative(XMLRPC_test):
             print e
             pass
 
-    def test_generator(self):
-        """
-        Iterate through tests.
+    def test_command(self, index, declarative_test_definition):
+        """Run an individual test
 
-        nose reports each one as a seperate test.
+        The arguments are provided by the pytest plugin.
         """
-        name = self.__class__.__name__
-        for (i, test) in enumerate(self.tests):
-            if callable(test):
-                func = lambda: test(self)
-                nice = '%s[%d]: call %s: %s' % (
-                    name, i, test.__name__, test.__doc__
-                )
-                func.description = nice
+        if callable(declarative_test_definition):
+            declarative_test_definition(self)
         else:
-                nice = '%s[%d]: %s: %s' % (
-                    name, i, test['command'][0], test.get('desc', '')
-                )
-                func = lambda: self.check(nice, **test)
-                func.description = nice
-            yield (func,)
+            self.check(**declarative_test_definition)
 
     def check(self, nice, desc, command, expected, extra_check=None):
         (cmd, args, options) = command