Replaces Stacktraces with useful error messages.

Changed the message shown when a user doesn't enter project/tenant
id/name to be more informative.

When attempting to stat a container without supplying project/tenant
name or id, an empty response was being returned instead of an error
being raised.

Changed the error raised in swiftclient.client when no tenant or project
is specified to be more specific.

Add tests for basic regression checking.

Closes-Bug: #1372589

Change-Id: I4eb6964d9f1702db119cc0294edc02841b1ecd5f

4 files changed, 88 insertions, 17 deletions

diff --git a/swiftclient/client.py b/swiftclient/client.py
index def40bf..8cbedc7 100644
--- a/swiftclient/client.py
+++ b/swiftclient/client.py
@@ -396,7 +396,9 @@ def get_auth(auth_url, user, key, **kwargs):
         if not (os_options.get('tenant_name') or os_options.get('tenant_id')
                 or os_options.get('project_name')
                 or os_options.get('project_id')):
-            raise ClientException('No tenant specified')
+            if auth_version in AUTH_VERSIONS_V2:
+                raise ClientException('No tenant specified')
+            raise ClientException('No project name or project id specified.')
 
         cacert = kwargs.get('cacert', None)
         storage_url, token = get_auth_keystone(auth_url, user,
diff --git a/swiftclient/service.py b/swiftclient/service.py
index a91c605..15decf7 100644
--- a/swiftclient/service.py
+++ b/swiftclient/service.py
@@ -434,7 +434,7 @@ class SwiftService(object):
                     })
                     return res
                 except ClientException as err:
-                    if err.http_status == 404:
+                    if err.http_status != 404:
                         res.update({
                             'success': False,
                             'error': err
diff --git a/swiftclient/shell.py b/swiftclient/shell.py
index 619ec5c..015c9d9 100755
--- a/swiftclient/shell.py
+++ b/swiftclient/shell.py
@@ -488,13 +488,15 @@ def st_stat(parser, args, output_manager):
     _opts = vars(options)
 
     with SwiftService(options=_opts) as swift:
-        if not args:
-            stat_result = swift.stat()
-            items = stat_result['items']
-            headers = stat_result['headers']
-            print_account_stats(items, headers, output_manager)
-        else:
-            try:
+        try:
+            if not args:
+                stat_result = swift.stat()
+                if not stat_result['success']:
+                    raise stat_result['error']
+                items = stat_result['items']
+                headers = stat_result['headers']
+                print_account_stats(items, headers, output_manager)
+            else:
                 container = args[0]
                 if '/' in container:
                     output_manager.error(
@@ -505,6 +507,8 @@ def st_stat(parser, args, output_manager):
                 args = args[1:]
                 if not args:
                     stat_result = swift.stat(container=container)
+                    if not stat_result['success']:
+                        raise stat_result['error']
                     items = stat_result['items']
                     headers = stat_result['headers']
                     print_container_stats(items, headers, output_manager)
@@ -527,8 +531,8 @@ def st_stat(parser, args, output_manager):
                             'Usage: %s stat %s\n%s', BASENAME,
                             st_stat_options, st_stat_help)
 
-            except SwiftError as e:
-                output_manager.error(e.value)
+        except SwiftError as e:
+            output_manager.error(e.value)
 
 
 st_post_options = '''[--read-acl <acl>] [--write-acl <acl>] [--sync-to]
@@ -961,8 +965,8 @@ def parse_args(parser, args, enforce_requires=True):
 
     if (not (options.auth and options.user and options.key)
             and options.auth_version != '3'):
-            # Use keystone auth if any of the old-style args are missing
-            options.auth_version = '2.0'
+        # Use keystone auth if any of the old-style args are missing
+        options.auth_version = '2.0'
 
     # Use new-style args if old ones not present
     if not options.auth and options.os_auth_url:
diff --git a/tests/unit/test_shell.py b/tests/unit/test_shell.py
index 8e61cb4..29d7472 100644
--- a/tests/unit/test_shell.py
+++ b/tests/unit/test_shell.py
@@ -24,6 +24,7 @@ import swiftclient
 from swiftclient.service import SwiftError
 import swiftclient.shell
 import swiftclient.utils
+from swiftclient.multithreading import OutputManager
 
 from os.path import basename, dirname
 from tests.unit.test_swiftclient import MockHttpTest
@@ -551,13 +552,13 @@ class TestParsing(unittest.TestCase):
         # check the expected opts are set
         for key, v in opts.items():
             actual = getattr(actual_opts, key)
-            self.assertEqual(v, actual, 'Expected %s for key %s, found %s'
-                                        % (v, key, actual))
+            self.assertEqual(v, actual, 'Expected %s for key %s, found %s' %
+                             (v, key, actual))
 
         for key, v in os_opts.items():
             actual = getattr(actual_opts, "os_" + key)
-            self.assertEqual(v, actual, 'Expected %s for key %s, found %s'
-                                        % (v, key, actual))
+            self.assertEqual(v, actual, 'Expected %s for key %s, found %s' %
+                             (v, key, actual))
 
         # check the os_options dict values are set
         self.assertTrue(hasattr(actual_opts, 'os_options'))
@@ -725,6 +726,55 @@ class TestParsing(unittest.TestCase):
         args = _make_args("stat", opts, os_opts)
         self.assertRaises(SystemExit, swiftclient.shell.main, args)
 
+    def test_no_tenant_name_or_id_v2(self):
+        os_opts = {"password": "secret",
+                   "username": "user",
+                   "auth_url": "http://example.com:5000/v3",
+                   "tenant_name": "",
+                   "tenant_id": ""}
+
+        out = six.StringIO()
+        err = six.StringIO()
+        mock_output = _make_output_manager(out, err)
+        with mock.patch('swiftclient.shell.OutputManager', mock_output):
+            args = _make_args("stat", {}, os_opts)
+            self.assertRaises(SystemExit, swiftclient.shell.main, args)
+        self.assertEqual(err.getvalue().strip(), 'No tenant specified')
+
+        out = six.StringIO()
+        err = six.StringIO()
+        mock_output = _make_output_manager(out, err)
+        with mock.patch('swiftclient.shell.OutputManager', mock_output):
+            args = _make_args("stat", {}, os_opts, cmd_args=["testcontainer"])
+            self.assertRaises(SystemExit, swiftclient.shell.main, args)
+        self.assertEqual(err.getvalue().strip(), 'No tenant specified')
+
+    def test_no_tenant_name_or_id_v3(self):
+        os_opts = {"password": "secret",
+                   "username": "user",
+                   "auth_url": "http://example.com:5000/v3",
+                   "tenant_name": "",
+                   "tenant_id": ""}
+
+        out = six.StringIO()
+        err = six.StringIO()
+        mock_output = _make_output_manager(out, err)
+        with mock.patch('swiftclient.shell.OutputManager', mock_output):
+            args = _make_args("stat", {"auth_version": "3"}, os_opts)
+            self.assertRaises(SystemExit, swiftclient.shell.main, args)
+        self.assertEqual(err.getvalue().strip(),
+                         'No project name or project id specified.')
+
+        out = six.StringIO()
+        err = six.StringIO()
+        mock_output = _make_output_manager(out, err)
+        with mock.patch('swiftclient.shell.OutputManager', mock_output):
+            args = _make_args("stat", {"auth_version": "3"},
+                              os_opts, cmd_args=["testcontainer"])
+            self.assertRaises(SystemExit, swiftclient.shell.main, args)
+        self.assertEqual(err.getvalue().strip(),
+                         'No project name or project id specified.')
+
     def test_insufficient_env_vars_v3(self):
         args = _make_args("stat", {}, {})
         opts = {"auth_version": "3"}
@@ -1043,3 +1093,18 @@ class TestKeystoneOptions(MockHttpTest):
 
         opts = {'auth-version': '2.0'}
         self._test_options(opts, os_opts)
+
+
+def _make_output_manager(stdout, stderr):
+    class MockOutputManager(OutputManager):
+        # This class is used to mock OutputManager so that we can
+        # override stdout and stderr. Mocking sys.stdout & sys.stdout
+        # doesn't work because they are argument defaults in the
+        # OutputManager constructor and those defaults are pinned to
+        # the value of sys.stdout/stderr before we get chance to mock them.
+        def __init__(self, print_stream=None, error_stream=None):
+            super(MockOutputManager, self).__init__()
+            self.print_stream = stdout
+            self.error_stream = stderr
+
+    return MockOutputManager