add uvloop to the test suite

.travis.yml

@@ -31,9 +31,10 @@ before_script:
     - "mysql -e 'DROP DATABASE IF EXISTS test_pymysql2; create database test_pymysql2 DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'"
 
 install:
+    - if python -c "import sys; sys.exit(sys.version_info < (3,5))"; then
+          pip install uvloop;
+      fi
     - pip install -Ur requirements-dev.txt
-    - pip install .
-    - pip install coveralls
 
 script:
     - make cov

tests/conftest.py

@@ -7,11 +7,29 @@
 import pytest
 
 
+PY_35 = sys.version_info >= (3, 5)
+if PY_35:
+    import uvloop
+else:
+    uvloop = None
+
+
+def pytest_generate_tests(metafunc):
+    if 'loop_type' in metafunc.fixturenames:
+        loop_type = ['asyncio', 'uvloop'] if uvloop else ['asyncio']
+        metafunc.parametrize("loop_type", loop_type)
+
+
 @pytest.yield_fixture
-def loop(request):
+def loop(request, loop_type):
     loop = asyncio.new_event_loop()
     asyncio.set_event_loop(None)
 
+    if uvloop and loop_type == 'uvloop':
+        loop = uvloop.new_event_loop()
+    else:
+        loop = asyncio.new_event_loop()
+
     yield loop
 
     if not loop._closed: