test_import_patched_defaults bended to play with pyopenssl>=16.1.0

Basically this patch replaces urllib with custom module that is guaranteed not imported before patching.
https://github.com/eventlet/eventlet/issues/362

More general issue here https://github.com/eventlet/eventlet/issues/368

tests/__init__.py

@@ -302,16 +302,23 @@ def get_database_auth():
     return retval
 
 
-def run_python(path, env=None, args=None, timeout=None):
+def run_python(path, env=None, args=None, timeout=None, pythonpath_extend=None, expect_pass=False):
     new_argv = [sys.executable]
     new_env = os.environ.copy()
+    new_env.setdefault('eventlet_test_in_progress', 'yes')
+    src_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
     if path:
         path = os.path.abspath(path)
         new_argv.append(path)
-        src_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
         new_env['PYTHONPATH'] = os.pathsep.join(sys.path + [src_dir])
     if env:
         new_env.update(env)
+    if pythonpath_extend:
+        new_path = [p for p in new_env.get('PYTHONPATH', '').split(os.pathsep) if p]
+        new_path.extend(
+            p if os.path.isabs(p) else os.path.join(src_dir, p) for p in pythonpath_extend
+        )
+        new_env['PYTHONPATH'] = os.pathsep.join(new_path)
     if args:
         new_argv.extend(args)
     p = subprocess.Popen(
@@ -329,21 +336,25 @@ def run_python(path, env=None, args=None, timeout=None):
         p.kill()
         output, _ = p.communicate(timeout=timeout)
         return '{0}\nFAIL - timed out'.format(output).encode()
+
+    if expect_pass:
+        if output.startswith(b'skip'):
+            parts = output.rstrip().split(b':', 1)
+            skip_args = []
+            if len(parts) > 1:
+                skip_args.append(parts[1])
+            raise SkipTest(*skip_args)
+        ok = output.rstrip() == b'pass'
+        if not ok:
+            sys.stderr.write('Program {0} output:\n---\n{1}\n---\n'.format(path, output.decode()))
+        assert ok, 'Expected single line "pass" in stdout'
+
     return output
 
 
-def run_isolated(path, prefix='tests/isolated/', env=None, args=None, timeout=None):
-    output = run_python(prefix + path, env=env, args=args, timeout=timeout).rstrip()
-    if output.startswith(b'skip'):
-        parts = output.split(b':', 1)
-        skip_args = []
-        if len(parts) > 1:
-            skip_args.append(parts[1])
-        raise SkipTest(*skip_args)
-    ok = output == b'pass'
-    if not ok:
-        sys.stderr.write('Isolated test {0} output:\n---\n{1}\n---\n'.format(path, output.decode()))
-    assert ok, 'Expected single line "pass" in stdout'
+def run_isolated(path, prefix='tests/isolated/', **kwargs):
+    kwargs.setdefault('expect_pass', True)
+    run_python(prefix + path, **kwargs)
 
 
 certificate_file = os.path.join(os.path.dirname(__file__), 'test_server.crt')
@@ -353,3 +364,10 @@ private_key_file = os.path.join(os.path.dirname(__file__), 'test_server.key')
 def test_run_python_timeout():
     output = run_python('', args=('-c', 'import time; time.sleep(0.5)'), timeout=0.1)
     assert output.endswith(b'FAIL - timed out')
+
+
+def test_run_python_pythonpath_extend():
+    code = '''import os, sys ; print('\\n'.join(sys.path))'''
+    output = run_python('', args=('-c', code), pythonpath_extend=('dira', 'dirb'))
+    assert b'/dira\n' in output
+    assert b'/dirb\n' in output

tests/env_test.py

@@ -19,12 +19,12 @@ socket.gethostbyname('localhost')
 socket.getaddrinfo('localhost', 80)
 print('pass')
 '''
-    output = tests.run_python(
+    tests.run_python(
         path=None,
         env={'EVENTLET_TPOOL_DNS': 'yes'},
         args=['-c', code],
+        expect_pass=True,
     )
-    assert output.rstrip() == b'pass'
 
 
 @tests.skip_with_pyevent

tests/isolated/patcher_import_patched_defaults.py

@@ -1,15 +1,18 @@
-import os
 __test__ = False
 
+if __name__ == '__main__':
+    import sys
+    # On eventlet<=0.20.0 uncommenting this unpatched import fails test
+    # because import_patched did not agressively repatch sub-imported modules cached in sys.modules
+    # to be fixed in https://github.com/eventlet/eventlet/issues/368
+    # import tests.patcher.shared_import_socket
 
-if os.environ.get('eventlet_test_import_patched_defaults') == '1':
-    try:
-        import urllib.request as target
-    except ImportError:
-        import urllib as target
+    import eventlet
+    target = eventlet.import_patched('tests.patcher.shared1').shared
     t = target.socket.socket
-    import eventlet.green.socket
-    if issubclass(t, eventlet.green.socket.socket):
-        print('pass')
-    else:
+    import eventlet.green.socket as g
+    if not issubclass(t, g.socket):
         print('Fail. Target socket not green: {0} bases {1}'.format(t, t.__bases__))
+        sys.exit(1)
+
+    print('pass')

tests/patcher/shared1.py

@@ -0,0 +1,11 @@
+import os
+__test__ = False
+shared = None
+
+
+if os.environ.get('eventlet_test_in_progress') == 'yes':
+    # pyopenssl imported urllib before we could patch it
+    # we can ensure this shared module was not imported
+    # https://github.com/eventlet/eventlet/issues/362
+    import tests.patcher.shared_import_socket as shared
+    _ = shared  # mask unused import error

tests/patcher/shared_import_socket.py

@@ -0,0 +1,7 @@
+import os
+import socket
+__test__ = False
+_ = socket  # mask unused import error
+
+# prevent accidental imports
+assert os.environ.get('eventlet_test_in_progress') == 'yes'

tests/patcher_test.py

@@ -84,17 +84,7 @@ class ImportPatched(ProcessBase):
 
 
 def test_import_patched_defaults():
-    code = '''\
-import eventlet
-eventlet.import_patched('patcher_import_patched_defaults')
-'''
-    isolated_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) + '/tests/isolated'
-    env = {
-        'eventlet_test_import_patched_defaults': '1',
-        'PYTHONPATH': os.pathsep.join(sys.path + [isolated_path]),
-    }
-    output = tests.run_python(path=None, env=env, args=['-c', code])
-    assert output.rstrip() == b'pass', repr(output)
+    tests.run_isolated('patcher_import_patched_defaults.py')
 
 
 class MonkeyPatch(ProcessBase):

tests/socket_test.py

@@ -72,10 +72,7 @@ def test_dns_methods_are_green():
         with open(mock_sys_pkg_dir + '/dns.py', 'wb') as f:
             f.write(b'raise Exception("Your IP address string is so illegal ' +
                     b'it prevents installing packages.")\n')
-        tests.run_isolated(
-            'socket_resolve_green.py',
-            env={'PYTHONPATH': os.pathsep.join(sys.path + [mock_sys_pkg_dir])},
-        )
+        tests.run_isolated('socket_resolve_green.py', pythonpath_extend=[mock_sys_pkg_dir])
     finally:
         shutil.rmtree(mock_sys_pkg_dir)
 

tox.ini

@@ -42,12 +42,12 @@ basepython =
     py35: python3.5
     pypy: pypy
 deps =
-    nose==1.3.1
-    setuptools==5.4.1
+    nose==1.3.7
+    setuptools==32.3.1
     py{26,27}: subprocess32==3.2.7
     py{26,27}-{selects,poll,epolls}: MySQL-python==1.2.5
     py26-{selects,poll,epolls}: pyopenssl==0.13
-    py{27,33,34}-{selects,poll,epolls}: pyopenssl==16.0.0
+    py{27,33,34}-{selects,poll,epolls}: pyopenssl==16.2.0
     {selects,poll,epolls}: psycopg2cffi-compat==1.1
     {selects,poll,epolls}: pyzmq==13.1.0
 commands =