Refactor coroutine provider tests

tests/unit/providers/test_coroutines_py3.py

@@ -1,9 +1,6 @@
 """Dependency injector coroutine providers unit tests."""
 
-try:
-    import asyncio
-except ImportError:
-    asyncio = None
+import asyncio
 
 import unittest2 as unittest
 
@@ -13,24 +10,21 @@ from dependency_injector import (
 )
 
 
-if asyncio:
-    @asyncio.coroutine
-    def _example(arg1, arg2, arg3, arg4):
+@asyncio.coroutine
+def _example(arg1, arg2, arg3, arg4):
     future = asyncio.Future()
     future.set_result(None)
     yield from future
     return arg1, arg2, arg3, arg4
 
-    def _run(coro):
+
+def _run(coro):
     loop = asyncio.get_event_loop()
     return loop.run_until_complete(coro)
-else:
-    _example = None
 
 
 class CoroutineTests(unittest.TestCase):
 
-    if asyncio:
     def test_init_with_coroutine(self):
         self.assertTrue(providers.Coroutine(_example))
 
@@ -197,7 +191,6 @@ class CoroutineTests(unittest.TestCase):
 
 class DelegatedCoroutineTests(unittest.TestCase):
 
-    if asyncio:
     def test_inheritance(self):
         self.assertIsInstance(providers.DelegatedCoroutine(_example),
                               providers.Coroutine)
@@ -222,7 +215,6 @@ class DelegatedCoroutineTests(unittest.TestCase):
 
 class AbstractCoroutineTests(unittest.TestCase):
 
-    if asyncio:
     def test_inheritance(self):
         self.assertIsInstance(providers.AbstractCoroutine(_example),
                               providers.Coroutine)
@@ -277,7 +269,6 @@ class AbstractCoroutineTests(unittest.TestCase):
 
 class CoroutineDelegateTests(unittest.TestCase):
 
-    if asyncio:
     def setUp(self):
         self.delegated = providers.Coroutine(_example)
         self.delegate = providers.CoroutineDelegate(self.delegated)