setup.py: Enable tests discovery

Author: 1st1

setup.py

@@ -1,6 +1,7 @@
 import os
 import subprocess
 import sys
+import unittest
 
 
 if sys.platform in ('win32', 'cygwin', 'cli'):
@@ -16,6 +17,12 @@
 LIBUV_DIR = os.path.join(os.path.dirname(__file__), 'vendor', 'libuv')
 
 
+def discover_tests():
+    test_loader = unittest.TestLoader()
+    test_suite = test_loader.discover('tests', pattern='test_*.py')
+    return test_suite
+
+
 class libuv_build_ext(build_ext):
     build_ext.user_options.extend([
         ("use-system-libuv", None,
@@ -97,5 +104,6 @@ def build_extensions(self):
         'Intended Audience :: Developers',
     ],
     provides=['uvloop'],
-    include_package_data=True
+    include_package_data=True,
+    test_suite='setup.discover_tests'
 )