tests: improve "revert template changes" test

There is no more significant difference between PV and HVM. VMs are HVM
by default anyway. More important for this test is difference between
Linux (with Qubes packages installed) and other OS-es. Rename tests
accordingly. The later one is still incomplete.

qubes/tests/integ/basic.py

@@ -343,7 +343,7 @@ class TC_03_QvmRevertTemplateChanges(qubes.tests.SystemTestCase):
     def cleanup_template(self):
         del self.test_template
 
-    def setup_pv_template(self):
+    def setup_template(self):
         self.test_template = self.app.add_new_vm(
             qubes.vm.templatevm.TemplateVM,
             name=self.make_vm_name("pv-clone"),
@@ -351,26 +351,15 @@ class TC_03_QvmRevertTemplateChanges(qubes.tests.SystemTestCase):
         )
         self.addCleanup(self.cleanup_template)
         self.test_template.clone_properties(self.app.default_template)
+        self.test_template.features.update(self.app.default_template.features)
+        self.test_template.tags.update(self.app.default_template.tags)
         self.loop.run_until_complete(
             self.test_template.clone_disk_files(self.app.default_template))
         self.app.save()
 
-    def setup_hvm_template(self):
-        self.test_template = self.app.add_new_vm(
-            qubes.vm.templatevm.TemplateVM,
-            name=self.make_vm_name("hvm"),
-            label='red',
-            virt_mode='hvm',
-        )
-        self.addCleanup(self.cleanup_template)
-        self.loop.run_until_complete(self.test_template.create_on_disk())
-        self.app.save()
-
     def get_rootimg_checksum(self):
-        p = subprocess.Popen(
-            ['sha1sum', self.test_template.volumes['root'].path],
-            stdout=subprocess.PIPE)
-        return p.communicate()[0]
+        return subprocess.check_output(
+            ['sha1sum', self.test_template.volumes['root'].path])
 
     def _do_test(self):
         checksum_before = self.get_rootimg_checksum()
@@ -387,26 +376,26 @@ class TC_03_QvmRevertTemplateChanges(qubes.tests.SystemTestCase):
             *revert_cmd))
         self.loop.run_until_complete(p.wait())
         self.assertEqual(p.returncode, 0)
-
+        del p
 
         checksum_after = self.get_rootimg_checksum()
         self.assertEqual(checksum_before, checksum_after)
 
     @unittest.expectedFailure
-    def test_000_revert_pv(self):
+    def test_000_revert_linux(self):
         """
         Test qvm-revert-template-changes for PV template
         """
-        self.setup_pv_template()
+        self.setup_template()
         self._do_test()
 
-    @unittest.skip('HVM not yet implemented')
-    def test_000_revert_hvm(self):
+    @unittest.skip('TODO: some non-linux system')
+    def test_001_revert_non_linux(self):
         """
         Test qvm-revert-template-changes for HVM template
         """
         # TODO: have some system there, so the root.img will get modified
-        self.setup_hvm_template()
+        self.setup_template()
         self._do_test()
 
 class TC_30_Gui_daemon(qubes.tests.SystemTestCase):