Add unit tests to ensure a valid provider

tests/unit/utils/gitfs_test.py

@@ -0,0 +1,115 @@
+# -*- coding: utf-8 -*-
+'''
+These only test the provider selection and verification logic, they do not init
+any remotes.
+'''
+
+# Import python libs
+from __future__ import absolute_import
+
+# Import Salt Testing libs
+from salttesting import skipIf, TestCase
+from salttesting.mock import MagicMock, patch, NO_MOCK, NO_MOCK_REASON
+from salttesting.helpers import ensure_in_syspath
+ensure_in_syspath('../../')
+
+# Import salt libs
+import salt.utils.gitfs
+from salt.exceptions import FileserverConfigError
+
+# GLOBALS
+OPTS = {'cachedir': '/tmp/gitfs-test-cache'}
+
+
+@skipIf(NO_MOCK, NO_MOCK_REASON)
+class TestGitFSProvider(TestCase):
+
+    def test_provider_case_insensitive(self):
+        '''
+        Ensure that both lowercase and non-lowercase values are supported
+        '''
+        provider = 'GitPython'
+        for role_name, role_class in (
+                ('gitfs', salt.utils.gitfs.GitFS),
+                ('git_pillar', salt.utils.gitfs.GitPillar),
+                ('winrepo', salt.utils.gitfs.WinRepo)):
+
+            key = '{0}_provider'.format(role_name)
+            with patch.object(role_class, 'verify_gitpython',
+                              MagicMock(return_value=True)):
+                with patch.object(role_class, 'verify_pygit2',
+                                  MagicMock(return_value=False)):
+                    with patch.object(role_class, 'verify_dulwich',
+                                      MagicMock(return_value=False)):
+                        args = [OPTS]
+                        if role_name == 'winrepo':
+                            args.append('/tmp/winrepo-dir')
+                        with patch.dict(OPTS, {key: provider}):
+                            # Try to create an instance with uppercase letters in
+                            # provider name. If it fails then a
+                            # FileserverConfigError will be raised, so no assert is
+                            # necessary.
+                            role_class(*args)
+                            # Now try to instantiate an instance with all lowercase
+                            # letters. Again, no need for an assert here.
+                            role_class(*args)
+
+    def test_valid_provider(self):
+        '''
+        Ensure that an invalid provider is not accepted, raising a
+        FileserverConfigError.
+        '''
+        def _get_mock(verify, provider):
+            '''
+            Return a MagicMock with the desired return value
+            '''
+            return MagicMock(return_value=verify.endswith(provider))
+
+        for role_name, role_class in (
+                ('gitfs', salt.utils.gitfs.GitFS),
+                ('git_pillar', salt.utils.gitfs.GitPillar),
+                ('winrepo', salt.utils.gitfs.WinRepo)):
+            key = '{0}_provider'.format(role_name)
+            for provider in salt.utils.gitfs.VALID_PROVIDERS:
+                verify = 'verify_gitpython'
+                mock1 = _get_mock(verify, provider)
+                with patch.object(role_class, verify, mock1):
+                    verify = 'verify_pygit2'
+                    mock2 = _get_mock(verify, provider)
+                    with patch.object(role_class, verify, mock2):
+                        verify = 'verify_dulwich'
+                        mock3 = _get_mock(verify, provider)
+                        with patch.object(role_class, verify, mock3):
+                            args = [OPTS]
+                            if role_name == 'winrepo':
+                                args.append('/tmp/winrepo-dir')
+                            with patch.dict(OPTS, {key: provider}):
+                                if role_name == 'gitfs' \
+                                        or (role_name != 'gitfs'
+                                            and provider != 'dulwich'):
+                                    # This is a valid provider, so this should
+                                    # pass without raising an exception.
+                                    role_class(*args)
+                                else:
+                                    # Dulwich is not supported for git_pillar nor
+                                    # winrepo, so trying to use it should raise an
+                                    # exception.
+                                    self.assertRaises(
+                                        FileserverConfigError,
+                                        role_class,
+                                        *args
+                                    )
+
+                            with patch.dict(OPTS, {key: 'foo'}):
+                                # Set the provider name to a known invalid provider
+                                # and make sure it raises an exception.
+                                self.assertRaises(
+                                    FileserverConfigError,
+                                    role_class,
+                                    *args
+                                )
+
+
+if __name__ == '__main__':
+    from integration import run_tests
+    run_tests(TestGitFSProvider, needs_daemon=False)