Tests: ability to run unitd with specified "--user" option.

test/conftest.py

@@ -48,6 +48,11 @@ def pytest_addoption(parser):
         action="store_true",
         help="Run unsafe tests",
     )
+    parser.addoption(
+        "--user",
+        type=str,
+        help="Default user for non-privileged processes of unitd",
+    )
 
 
 unit_instance = {}
@@ -60,6 +65,7 @@ def pytest_configure(config):
     option.print_log = config.option.print_log
     option.save_log = config.option.save_log
     option.unsafe = config.option.unsafe
+    option.user = config.option.user
 
     option.generated_tests = {}
     option.current_dir = os.path.abspath(
@@ -283,9 +289,7 @@ def unit_run():
 
     os.mkdir(temp_dir + '/state')
 
-    with open(temp_dir + '/unit.log', 'w') as log:
-        unit_instance['process'] = subprocess.Popen(
-            [
+    unitd_args = [
         unitd,
         '--no-daemon',
         '--modules',
@@ -300,9 +304,13 @@ def unit_run():
         'unix:' + temp_dir + '/control.unit.sock',
         '--tmp',
         temp_dir,
-            ],
-            stderr=log,
-        )
+    ]
+
+    if option.user:
+        unitd_args.extend(['--user', option.user])
+
+    with open(temp_dir + '/unit.log', 'w') as log:
+        unit_instance['process'] = subprocess.Popen(unitd_args, stderr=log)
 
     if not waitforfiles(temp_dir + '/control.unit.sock'):
         _print_log()