Test the worker in its own subprocess

- run with an empty queue
- schedule one job (which uses get_current_connection and get_current_job) and
run `rqworker`
- schedule a job that itself schedules `access_self` and run `rqworker`
- Make sure the job didn't fail by assuring the failed queue is still empty
  afterwards.
- Install this package locally when running in travis.
  This actually unifies the behaviour of tox and travis as tox also builds the
  package and then installs it into each test environment.
- fix flake8 (as run by tox)

.travis.yml

@@ -11,7 +11,7 @@ python:
   - "pypy"
 install:
   - if [[ $TRAVIS_PYTHON_VERSION == 2.6 ]]; then pip install -r py26-requirements.txt; fi
-  - pip install -r requirements.txt
+  - pip install -e .
   - pip install pytest-cov
   - pip install coveralls
   #- pip install pytest  # installed by Travis by default already

tests/fixtures.py

@@ -9,7 +9,7 @@ from __future__ import (absolute_import, division, print_function,
 import os
 import time
 
-from rq import Connection, get_current_job
+from rq import Connection, get_current_job, get_current_connection
 from rq.decorators import job
 from rq.compat import PY2
 
@@ -55,6 +55,7 @@ def create_file_after_timeout(path, timeout):
 
 
 def access_self():
+    assert get_current_connection() is not None
     assert get_current_job() is not None
 
 

tests/test_job.py

@@ -302,6 +302,7 @@ class TestJob(RQTestCase):
         q.enqueue(fixtures.access_self)  # access_self calls get_current_job() and asserts
         w = Worker([q])
         w.work(burst=True)
+        assert get_failed_queue(self.testconn).count == 0
 
     def test_job_access_within_synchronous_job_function(self):
         queue = Queue(async=False)

tests/test_queue.py

@@ -241,15 +241,19 @@ class TestQueue(RQTestCase):
         self.assertEqual(queue, fooq)
         self.assertEqual(job.func, say_hello)
         self.assertEqual(job.origin, fooq.name)
-        self.assertEqual(job.args[0], 'for Foo',
-                         'Foo should be dequeued first.')
+        self.assertEqual(
+            job.args[0], 'for Foo',
+            'Foo should be dequeued first.'
+        )
 
         job, queue = Queue.dequeue_any([fooq, barq], None)
         self.assertEqual(queue, barq)
         self.assertEqual(job.func, say_hello)
         self.assertEqual(job.origin, barq.name)
-        self.assertEqual(job.args[0], 'for Bar',
-                         'Bar should be dequeued second.')
+        self.assertEqual(
+            job.args[0], 'for Bar',
+            'Bar should be dequeued second.'
+        )
 
     def test_dequeue_any_ignores_nonexisting_jobs(self):
         """Dequeuing (from any queue) silently ignores non-existing jobs."""
@@ -260,8 +264,10 @@ class TestQueue(RQTestCase):
 
         # Dequeue simply ignores the missing job and returns None
         self.assertEqual(q.count, 1)
-        self.assertEqual(Queue.dequeue_any([Queue(), Queue('low')], None),  # noqa
-                None)
+        self.assertEqual(
+            Queue.dequeue_any([Queue(), Queue('low')], None),  # noqa
+            None
+        )
         self.assertEqual(q.count, 0)
 
     def test_enqueue_sets_status(self):

tests/test_worker.py

@@ -8,13 +8,16 @@ from time import sleep
 import signal
 import time
 from multiprocessing import Process
+import subprocess
 
 from tests import RQTestCase, slow
 from tests.fixtures import (create_file, create_file_after_timeout,
-                            div_by_zero, do_nothing, say_hello, say_pid)
+                            div_by_zero, do_nothing, say_hello, say_pid,
+                            access_self)
 from tests.helpers import strip_microseconds
 
-from rq import get_failed_queue, Queue, SimpleWorker, Worker
+from rq import (get_failed_queue, Queue, SimpleWorker, Worker,
+                get_current_connection)
 from rq.compat import as_text, PY2
 from rq.job import Job, JobStatus
 from rq.registry import StartedJobRegistry
@@ -82,12 +85,16 @@ class TestWorker(RQTestCase):
         """Worker processes work, then quits."""
         fooq, barq = Queue('foo'), Queue('bar')
         w = Worker([fooq, barq])
-        self.assertEqual(w.work(burst=True), False,
-                         'Did not expect any work on the queue.')
+        self.assertEqual(
+            w.work(burst=True), False,
+            'Did not expect any work on the queue.'
+        )
 
         fooq.enqueue(say_hello, name='Frank')
-        self.assertEqual(w.work(burst=True), True,
-                         'Expected at least some work done.')
+        self.assertEqual(
+            w.work(burst=True), True,
+            'Expected at least some work done.'
+        )
 
     def test_worker_ttl(self):
         """Worker ttl."""
@@ -102,8 +109,10 @@ class TestWorker(RQTestCase):
         q = Queue('foo')
         w = Worker([q])
         job = q.enqueue('tests.fixtures.say_hello', name='Frank')
-        self.assertEqual(w.work(burst=True), True,
-                         'Expected at least some work done.')
+        self.assertEqual(
+            w.work(burst=True), True,
+            'Expected at least some work done.'
+        )
         self.assertEqual(job.result, 'Hi there, Frank!')
 
     def test_job_times(self):
@@ -116,14 +125,25 @@ class TestWorker(RQTestCase):
         self.assertIsNotNone(job.enqueued_at)
         self.assertIsNone(job.started_at)
         self.assertIsNone(job.ended_at)
-        self.assertEqual(w.work(burst=True), True,
-                         'Expected at least some work done.')
+        self.assertEqual(
+            w.work(burst=True), True,
+            'Expected at least some work done.'
+        )
         self.assertEqual(job.result, 'Hi there, Stranger!')
         after = utcnow()
         job.refresh()
-        self.assertTrue(before <= job.enqueued_at <= after, 'Not %s <= %s <= %s' % (before, job.enqueued_at, after))
-        self.assertTrue(before <= job.started_at <= after, 'Not %s <= %s <= %s' % (before, job.started_at, after))
-        self.assertTrue(before <= job.ended_at <= after, 'Not %s <= %s <= %s' % (before, job.ended_at, after))
+        self.assertTrue(
+            before <= job.enqueued_at <= after,
+            'Not %s <= %s <= %s' % (before, job.enqueued_at, after)
+        )
+        self.assertTrue(
+            before <= job.started_at <= after,
+            'Not %s <= %s <= %s' % (before, job.started_at, after)
+        )
+        self.assertTrue(
+            before <= job.ended_at <= after,
+            'Not %s <= %s <= %s' % (before, job.ended_at, after)
+        )
 
     def test_work_is_unreadable(self):
         """Unreadable jobs are put on the failed queue."""
@@ -557,8 +577,8 @@ def kill_worker(pid, double_kill):
 
 class TestWorkerShutdown(RQTestCase):
     def setUp(self):
-        # we want tests to fail if signal are ignored and the work remain running,
-        # so set a signal to kill them after 5 seconds
+        # we want tests to fail if signal are ignored and the work remain
+        # running, so set a signal to kill them after 5 seconds
         signal.signal(signal.SIGALRM, self._timeout)
         signal.alarm(5)
 
@@ -621,3 +641,35 @@ class TestWorkerShutdown(RQTestCase):
         shutdown_requested_date = w.shutdown_requested_date
         self.assertIsNotNone(shutdown_requested_date)
         self.assertEqual(type(shutdown_requested_date).__name__, 'datetime')
+
+
+def schedule_access_self():
+    q = Queue('default', connection=get_current_connection())
+    q.enqueue(access_self)
+
+
+class TestWorkerSubprocess(RQTestCase):
+    def setUp(self):
+        super(TestWorkerSubprocess, self).setUp()
+        db_num = self.testconn.connection_pool.connection_kwargs['db']
+        self.redis_url = 'redis://127.0.0.1:6379/%d' % db_num
+
+    def test_run_empty_queue(self):
+        """Run the worker in its own process with an empty queue"""
+        subprocess.check_call(['rqworker', '-u', self.redis_url, '-b'])
+
+    def test_run_access_self(self):
+        """Schedule a job, then run the worker as subprocess"""
+        q = Queue()
+        q.enqueue(access_self)
+        subprocess.check_call(['rqworker', '-u', self.redis_url, '-b'])
+        assert get_failed_queue().count == 0
+        assert q.count == 0
+
+    def test_run_scheduled_access_self(self):
+        """Schedule a job that schedules a job, then run the worker as subprocess"""
+        q = Queue()
+        q.enqueue(schedule_access_self)
+        subprocess.check_call(['rqworker', '-u', self.redis_url, '-b'])
+        assert get_failed_queue().count == 0
+        assert q.count == 0