tests: Use sys.executable during tests

setup.py

@@ -14,6 +14,7 @@ setup(
 	author_email='seba@someserver.de',
 	install_requires=['pyopenssl'],
 	tests_require=[
+		'pathlib2; python_version<"3"',
 		'pytest',
 		'requests',
 	],

tests/test_servefile.py

@@ -4,16 +4,19 @@ import pytest
 import requests
 import socket
 import subprocess
+import sys
 import tarfile
 import time
 import urllib3
 
 # crudly written to learn more about pytest and to have a base for refactoring
 
-try:
-    ConnectionRefusedError
+
+if sys.version_info.major >= 3:
+    from pathlib import Path
     connrefused_exc = ConnectionRefusedError
-except NameError:
+else:
+    from pathlib2 import Path
     connrefused_exc = socket.error
 
 
@@ -25,7 +28,8 @@ def run_servefile():
         if not isinstance(args, list):
             args = [args]
         print("running with args", args)
-        p = subprocess.Popen(['servefile'] + args, **kwargs)
+        servefile_path = str(Path(__file__).parent.parent / 'servefile')
+        p = subprocess.Popen([sys.executable, servefile_path] + args, **kwargs)
         time.sleep(kwargs.get('timeout', 0.3))
         instances.append(p)
 

tox.ini

@@ -3,6 +3,7 @@ envlist = py27,py36
 
 [testenv]
 deps =
+        pathlib2; python_version<"3"
         pytest
         requests
 commands = pytest --tb=short {posargs}