allow overriding logging.basicConfig

tests/test_logging.py

@@ -0,0 +1,33 @@
+import asyncio
+from sanic.response import text
+from sanic import Sanic
+from io import StringIO
+from sanic.utils import sanic_endpoint_test
+import logging
+
+logging_format = '''module: %(module)s; \
+function: %(funcName)s(); \
+message: %(message)s'''
+
+def test_log():
+    log_stream = StringIO()
+    for handler in logging.root.handlers[:]:
+            logging.root.removeHandler(handler)
+    logging.basicConfig(
+        format=logging_format,
+        level=logging.DEBUG,
+        stream=log_stream
+    )
+    log = logging.getLogger()
+    app = Sanic('test_logging', logger=True)
+    @app.route('/')
+    def handler(request):
+        log.info('hello world')
+        return text('hello')
+
+    request, response = sanic_endpoint_test(app)
+    log_text = log_stream.getvalue().strip().split('\n')[-3]
+    assert log_text == "module: test_logging; function: handler(); message: hello world"
+
+if __name__ =="__main__":
+    test_log()