tests: use proper 0o600 file permissions in more places

tests/cli/test_get_set.py

@@ -150,6 +150,7 @@ def test_set_origin_hint_override_no_leak_renderer(self):
             f.write('''network:
   renderer: networkd
   bridges: {br54: {dhcp4: true}}''')
+        os.chmod(defaults, mode=0o600)
         self._set(['bridges.br54.dhcp4=false', '--origin-hint=90-snapd-config'])
         self.assertTrue(os.path.isfile(defaults))
         with open(defaults, 'r') as f:
@@ -730,6 +731,7 @@ def test_get_all(self):
     def test_get_network(self):
         with open(self.path, 'w') as f:
             f.write('network:\n  version: 2\n  renderer: NetworkManager')
+        os.chmod(self.path, mode=0o600)
         out = yaml.safe_load(self._get(['network']))
         self.assertDictEqual({'renderer': 'NetworkManager', 'version': 2}, out)
 

tests/generator/base.py

@@ -335,6 +335,7 @@ def generate(self, yaml, expect_fail=False, extra_args=[], confs=None, skip_gene
                 path = os.path.join(self.confdir, f + '.yaml')
                 with open(path, 'w') as f:
                     f.write(contents)
+                os.chmod(path, mode=0o600)
                 yaml_input.append(path)
 
         argv = [exe_generate, '--root-dir', self.workdir.name] + extra_args

tests/generator/test_args.py

@@ -86,6 +86,7 @@ def test_help(self):
   ethernets:
     eth0:
       dhcp4: true''')
+        os.chmod(conf, mode=0o600)
 
         p = subprocess.Popen([exe_generate, '--root-dir', self.workdir.name, '--help'],
                              stdout=subprocess.PIPE, stderr=subprocess.PIPE,
@@ -125,6 +126,7 @@ def test_systemd_generator(self):
   ethernets:
     eth0:
       dhcp4: true''')
+        os.chmod(conf, mode=0o600)
         outdir = os.path.join(self.workdir.name, 'out')
         os.mkdir(outdir)