CLI tests: more testing and Python 3 fixes

- when downloading the internal job binaries, compare it
  with the original file;
- simplify the string matching for the error messages in negative
  testing (job binary and node group templates). The returned string
  is a bit different when using python 3 (few \n remainings, maybe
  there is an interaction between string and byte arrays.)
- run the API v2 tests using Python 3. Python 3 and API v2 tests
  have been both added in Stein.
- define few data strings used for testing as bytes, so that they
  can work with both Python 2 and Python 3.

Change-Id: I1924239659072ec8f1ea67df8d3d5b9a2264beb8

.zuul.yaml

@@ -80,18 +80,26 @@
 - job:
     name: sahara-tests-tempest-v2
     description: |
-      Run Tempest tests from the Sahara plugin against Sahara APIv2.
+      Run Tempest tests from the Sahara plugin against Sahara APIv2
+      and Python 3.
     parent: sahara-tests-tempest
     required-projects:
       - openstack/python-saharaclient
     branches: master
     vars:
+      devstack_localrc:
+        USE_PYTHON3: 'True'
       devstack_local_conf:
         test-config:
           $TEMPEST_CONFIG:
             data-processing:
               api_version_saharaclient: '2'
               use_api_v2: 'True'
+      devstack_services:
+        s-account: false
+        s-container: false
+        s-object: false
+        s-proxy: false
 
 # variant for pre-Rocky branches (no S3)
 - job:

sahara_tempest_plugin/tests/cli/base.py

@@ -188,18 +188,15 @@ class ClientTestBase(base.ClientTestBase):
         except exc.CommandFailed as e:
             # lower() is required because "result" string could
             # have the first letter capitalized.
-            output_msg = str(e).splitlines()
-            for msg in output_msg:
-                if msg.lower() == error_message.lower():
-                    self.assertEqual(error_message.lower(), msg.lower())
-                    msg_exist = True
+            if error_message.lower() in str(e).lower():
+                msg_exist = True
             if not msg_exist:
-                raise exc.TempestException('%s is not a part of output of '
-                                           'executed command %s'
-                                           % (error_message, cmd))
+                raise exc.TempestException('"%s" is not a part of output of '
+                                           'executed command "%s" (%s)'
+                                           % (error_message, cmd, output_msg))
         else:
-            raise exc.TempestException('%s %s in negative scenarios have been '
-                                       'executed without any errors'
+            raise exc.TempestException('"%s %s" in negative scenarios has '
+                                       'been executed without any errors'
                                        % (cmd, name))
 
     @classmethod

sahara_tempest_plugin/tests/cli/job_binaries.py

@@ -10,6 +10,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from filecmp import cmp
 from os import fdopen
 from os import path
 from os import remove
@@ -31,6 +32,7 @@ class SaharaJobBinaryCLITest(base.ClientTestBase):
 
     def openstack_job_binary_create(self, job_internal=True):
         job_binary_name = data_utils.rand_name('job-fake')
+        script_name = ''
         if job_internal:
             fd, script_name = tempfile.mkstemp()
             with fdopen(fd, 'w+') as jb:
@@ -48,11 +50,10 @@ class SaharaJobBinaryCLITest(base.ClientTestBase):
                 'Field',
                 'Value'
             ])
-        if job_internal:
-            remove(script_name)
-        return job_binary_name
+        return job_binary_name, script_name
 
-    def openstack_job_binary_download(self, job_binary_name):
+    def openstack_job_binary_download(self, job_binary_name,
+                                      original_file=None):
         if path.exists(job_binary_name):
             remove(job_binary_name)
 
@@ -60,6 +61,9 @@ class SaharaJobBinaryCLITest(base.ClientTestBase):
                        params=job_binary_name)
 
         self.assertTrue(path.exists(job_binary_name))
+        if original_file:
+            self.assertTrue(cmp(job_binary_name, original_file))
+            remove(original_file)
         remove(job_binary_name)
 
     def openstack_job_binary_show(self, job_binary_name):

sahara_tempest_plugin/tests/cli/test_scenario.py

@@ -159,13 +159,13 @@ class Scenario(images.SaharaImageCLITest,
     @testtools.skipIf(TEMPEST_CONF.data_processing.api_version_saharaclient !=
                       '1.1', "Full job binaries testing requires API v1.1")
     def test_job_binary_cli(self):
-        job_binary_name = self.openstack_job_binary_create()
+        job_binary_name, original_file = self.openstack_job_binary_create()
         self.addCleanup(self.delete_resource, 'job binary', job_binary_name)
 
         self.openstack_job_binary_list()
         self.openstack_job_binary_show(job_binary_name)
         self.openstack_job_binary_update(job_binary_name, flag='description')
-        self.openstack_job_binary_download(job_binary_name)
+        self.openstack_job_binary_download(job_binary_name, original_file)
         self.filter_job_binaries_in_list()
         self.negative_try_to_update_protected_jb(job_binary_name)
         self.openstack_job_binary_update(job_binary_name, flag='unprotected')
@@ -173,7 +173,8 @@ class Scenario(images.SaharaImageCLITest,
         self.negative_delete_removed_job_binary(job_binary_name)
 
     def test_job_template_cli(self):
-        job_binary_name = self.openstack_job_binary_create(job_internal=False)
+        job_binary_name, _ = self.openstack_job_binary_create(
+            job_internal=False)
         self.addCleanup(self.delete_resource, 'job binary', job_binary_name)
 
         job_template_name = self.openstack_job_template_create(job_binary_name)

sahara_tempest_plugin/tests/clients/test_job_binaries.py

@@ -85,7 +85,7 @@ class JobBinariesTest(base.BaseDataProcessingTest):
 
     def _check_internal_db_job_binary_create(self):
         name = data_utils.rand_name('sahara-internal-job-binary')
-        self.job_binary_data = 'Some data'
+        self.job_binary_data = b'Some data'
         job_binary_internal = (
             self.create_job_binary_internal(name, self.job_binary_data))
         self.internal_db_binary_with_extra = {

sahara_tempest_plugin/tests/clients/test_job_binary_internals.py

@@ -31,7 +31,7 @@ class JobBinaryInternalsTest(base.BaseDataProcessingTest):
 
     def _check_job_binary_internal_create(self):
         name = data_utils.rand_name('sahara-internal-job-binary')
-        self.job_binary_data = 'Some data'
+        self.job_binary_data = b'Some data'
         # create job binary internal
         resp_body = self.create_job_binary_internal(name, self.job_binary_data)
         # check that job_binary_internal created successfully