Fix pytests and enable parallel registry tests

Dockerfile

@@ -162,7 +162,7 @@ RUN if [ "$RUN_TESTS" = true ]; then \
     fi
 
 RUN if [ "$RUN_TESTS" = true ]; then \
-      TEST=true PYTHONPATH="." venv/bin/py.test --verbose --show-count -x --color=no test/registry_tests.py ; \
+      TEST=true PYTHONPATH="." venv/bin/py.test --verbose --show-count -n auto -x --color=no test/registry_tests.py ; \
     fi
 
 RUN PYTHONPATH=. venv/bin/alembic heads | grep -E '^[0-9a-f]+ \(head\)$' > ALEMBIC_HEAD

endpoints/v2/__init__.py

@@ -1,4 +1,5 @@
 import logging
+import os.path
 
 from functools import wraps
 from urlparse import urlparse
@@ -75,7 +76,8 @@ def paginate(limit_kwarg_name='limit', offset_kwarg_name='offset',
           return
 
         next_page_token = encrypt_page_token({'offset': limit + offset})
-        link_url = get_app_url() + url_for(request.endpoint, **request.view_args)
+
+        link_url = os.path.join(get_app_url(), url_for(request.endpoint, **request.view_args))
         link_param = urlencode({'n': limit, 'next_page': next_page_token})
         link = '<%s?%s>; rel="next"' % (link_url, link_param)
         response.headers['Link'] = link

requirements-tests.txt

@@ -3,4 +3,5 @@ pytest-cov
 python-coveralls
 pytest-flask
 pytest-runner
+pytest-xdist
 -e git+https://github.com/ant31/pytest-sugar.git#egg=pytest-sugar

test/registry_tests.py

@@ -42,6 +42,7 @@ from image.docker.schema1 import DockerSchema1ManifestBuilder
 from initdb import wipe_database, initialize_database, populate_database
 from jsonschema import validate as validate_schema
 from util.security.registry_jwt import decode_bearer_header
+from test.testutil import get_open_port
 
 
 try:
@@ -156,7 +157,6 @@ class TestFeature(object):
                            headers={'Content-Type': 'application/json'})
 
 
-_PORT_NUMBER = 5001
 _CLEAN_DATABASE_PATH = None
 _JWK = RSAKey(key=RSA.generate(2048))
 
@@ -236,14 +236,11 @@ def get_new_database_uri():
 
 class RegistryTestCaseMixin(LiveServerTestCase):
   def create_app(self):
-    global _PORT_NUMBER
-    _PORT_NUMBER = _PORT_NUMBER + 1
-
     if os.environ.get('DEBUG') == 'true':
       app.config['DEBUG'] = True
 
     app.config['TESTING'] = True
-    app.config['LIVESERVER_PORT'] = _PORT_NUMBER
+    app.config['LIVESERVER_PORT'] = get_open_port()
     app.config['DB_URI'] = get_new_database_uri()
     return app
 
@@ -1412,7 +1409,7 @@ class V2RegistryTests(V2RegistryPullMixin, V2RegistryPushMixin, RegistryTestsMix
       self.assertTrue(link.endswith('; rel="next"'))
 
       url, _ = link.split(';')
-      relative_url = url[len(self.get_server_url()):-1]
+      relative_url = url[url.find('/v2/'):-1]
 
       encountered.update(set(result_json['tags']))
 
@@ -1474,8 +1471,10 @@ class V2RegistryTests(V2RegistryPullMixin, V2RegistryPushMixin, RegistryTestsMix
     labels = self.conduct('GET', '/api/v1/repository/devtable/newrepo/manifest/' + digest + '/labels').json()
     self.assertEquals(2, len(labels['labels']))
 
-    self.assertEquals('text/plain', labels['labels'][0]['media_type'])
+    media_types = set([label['media_type'] for label in labels['labels']])
-    self.assertEquals('application/json', labels['labels'][1]['media_type'])
+
+    self.assertTrue('text/plain' in media_types)
+    self.assertTrue('application/json' in media_types)
 
   def test_invalid_manifest_type(self):
     namespace = 'devtable'

test/test_trigger.py

@@ -34,7 +34,7 @@ class TestTags(unittest.TestCase):
   def assertTagsForRef(self, ref, tags):
     prepared = PreparedBuild()
     prepared.tags_from_ref(ref, default_branch='master')
-    self.assertEquals(tags, prepared._tags)
+    self.assertEquals(set(tags), set(prepared._tags))
 
   def test_normal(self):
     self.assertTagsForRef('ref/heads/somebranch', ['somebranch'])

test/testutil.py

@@ -0,0 +1,14 @@
+import socket
+
+def get_open_port():
+  """ Retrieves an open port on the system. """
+
+  # Bind a socket to a random port. We can then ask for the port number,
+  # and return it.
+  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  s.bind(("", 0))
+  s.listen(1)
+  port = s.getsockname()[1]
+  s.close()
+
+  return port

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = {py27}-{unittest,api}
+envlist = {py27}-{unittest,registry}
 skipsdist = True
 
 [testenv]
@@ -11,7 +11,7 @@ deps =
 setenv =
     PYTHONPATH = {toxinidir}:{toxinidir}
     TEST=true
-    api: FILE="registry_tests.py"
+    registry: FILE="registry_tests.py"
     unittest: FILE=""
 commands =
          py.test --verbose test/{env:FILE} -vv {posargs}