Remove bad parameter for cfg.get

when loading from cfg file, cfg.get takes just 2 parameters not
three.

Added some basic tests and test for the specific change as well

Change-Id: I633d665f63271b6ada9196a0f08028d404b33110

oslo/version/version.py

@@ -169,9 +169,9 @@ class VersionInfo(object):
         if project_name.startswith('python-'):
             project_name = project_name[7:]
 
-        self._vendor = cfg.get(project_name, "vendor", self._vendor)
+        self._vendor = cfg.get(project_name, "vendor")
-        self._product = cfg.get(project_name, "product", self._product)
+        self._product = cfg.get(project_name, "product")
-        self._suffix = cfg.get(project_name, "package", self._suffix)
+        self._suffix = cfg.get(project_name, "package")
 
     def _load_vendor_strings(self):
         """Load default and override vendor strings.

test-requirements.txt

@@ -2,6 +2,7 @@ coverage>=3.6
 discover
 fixtures>=0.3.12
 flake8==2.0
+mock>=1.0
 python-subunit
 oslo.sphinx
 sphinx>=1.1.2

tests/__init__.py

@@ -22,6 +22,7 @@ __all__ = [
 ]
 
 import os
+import tempfile
 
 import fixtures
 import testresources
@@ -53,3 +54,24 @@ class BaseTestCase(testtools.TestCase, testresources.ResourcedTestCase):
             self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
 
         self.useFixture(fixtures.NestedTempfile())
+
+    @staticmethod
+    def write_to_tempfile(content, suffix='', prefix='tmp'):
+        """Create temporary file or use existing file.
+
+        This util is needed for creating temporary file with
+        specified content, suffix and prefix.
+
+        :param content: content for temporary file.
+        :param suffix: same as parameter 'suffix' for mkstemp
+        :param prefix: same as parameter 'prefix' for mkstemp
+
+        For example: it can be used in database tests for creating
+        configuration files.
+        """
+        (fd, path) = tempfile.mkstemp(suffix=suffix, prefix=prefix)
+        try:
+            os.write(fd, content.encode('utf-8'))
+        finally:
+            os.close(fd)
+        return path

tests/test_version.py

@@ -18,6 +18,7 @@
 import os
 
 import fixtures
+import mock
 
 from oslo.version import version
 import tests
@@ -46,3 +47,40 @@ class FindConfigFilesTestCase(tests.BaseTestCase):
         self.assertEqual(config_files,
                          version._find_config_files(project='blaa',
                                                     extension='.json'))
+
+
+class BasicVersionTestCase(tests.BaseTestCase):
+
+    def test_version(self):
+        with mock.patch.object(version.VersionInfo,
+                               '_get_version_from_pkg_resources',
+                               return_value='5.5.5.5'):
+            v = version.VersionInfo(None)
+            self.assertEqual(v.version, '5.5.5.5')
+
+    def test_version_and_release(self):
+        with mock.patch.object(version.VersionInfo,
+                               '_get_version_from_pkg_resources',
+                               return_value='0.5.21.28.gae25b56'):
+            v = version.VersionInfo(None)
+            self.assertEqual(v.release, '0.5.21.28.gae25b56')
+            self.assertEqual(v.version, '0.5.21.28')
+
+    def test_vendor(self):
+        with mock.patch.multiple(version.VersionInfo,
+                                 _get_provider=mock.DEFAULT,
+                                 _load_from_pkg_info=mock.DEFAULT,
+                                 _load_from_setup_cfg=mock.DEFAULT):
+            path = self.write_to_tempfile("""[myfoo]
+vendor=bigco
+product=product123
+package=mysuffix
+""")
+            with mock.patch.object(version,
+                                   '_find_config_files',
+                                   return_value=path):
+                v = version.VersionInfo('myfoo')
+                self.assertEqual('myfoo', v.package)
+                self.assertEqual('bigco', v.vendor)
+                self.assertEqual('product123', v.product)
+                self.assertEqual('mysuffix', v.suffix)