[setup] Added extras directive to install test dependencies

Author: sque

setup.py

@@ -87,13 +87,18 @@ def index():
 import ast
 from setuptools import setup
 
-
 _version_re = re.compile(r'__version__\s+=\s+(.*)')
 
 with open('flask_log_request_id/__init__.py', 'rb') as f:
     version = str(ast.literal_eval(_version_re.search(
         f.read().decode('utf-8')).group(1)))
 
+test_requirements = [
+    'nose',
+    'mock==2.0.0',
+    'coverage~=4.3.4',
+    'celery~=4.1.0'
+]
 
 setup(
     name='Flask-Log-Request-ID',
@@ -117,15 +122,15 @@ def index():
     install_requires=[
         'Flask>=0.8',
     ],
-    tests_require=[
-        'nose',
-        'mock==2.0.0',
-        'coverage~=4.3.4',
-        'celery~=4.1.0'
-    ],
+    tests_require=test_requirements,
     setup_requires=[
-        "flake8"
+        "flake8",
+        "nose"
     ],
+    extras_require={
+        'test': test_requirements,
+        'celery': ["celery~=4.1.0"],
+    },
     test_suite='nose.collector',
     classifiers=[
         'Environment :: Web Environment', 'Intended Audience :: Developers',