test: Cover gevent autotracing

Signed-off-by: Ferenc Géczi <ferenc.geczi@ibm.com>

src/instana/__init__.py

@@ -55,17 +55,25 @@ def load(_):
         sys.argv = ['']
     return None
 
-
 def apply_gevent_monkey_patch():
-  from gevent import monkey
-
-  if os.environ.get("INSTANA_GEVENT_MONKEY_OPTIONS"):
-      all_accepted_patch_all_args = getter(monkey.patch_all)[0]
-      provided_options = os.environ.get("INSTANA_GEVENT_MONKEY_OPTIONS").replace("  ","").replace("--","")
-      args = {((k[3:] if k.startswith('no-') else k), k.startswith('no-')) for k in provided_options if (k in all_accepted_patch_all_args)}
-      monkey.patch_all(**args)
-  else:
-      monkey.patch_all()
+    from gevent import monkey
+
+    if os.environ.get("INSTANA_GEVENT_MONKEY_OPTIONS"):
+        def short_key(k):
+            return k[3:] if k.startswith('no-') else k
+
+        def key_to_bool(k):
+            return not k.startswith('no-')
+
+        import inspect
+        all_accepted_patch_all_args = inspect.getfullargspec(monkey.patch_all)[0]
+        provided_options = os.environ.get("INSTANA_GEVENT_MONKEY_OPTIONS").replace(" ","").replace("--","").split(',')
+        provided_options = [k for k in provided_options if short_key(k) in all_accepted_patch_all_args]
+
+        fargs = {short_key(k): key_to_bool(k) for (k,v) in zip(provided_options, [True]*len(provided_options))}
+        monkey.patch_all(**fargs)
+    else:
+        monkey.patch_all()
 
 
 def get_lambda_handler_or_default():

tests/frameworks/test_gevent_autotrace.py

@@ -0,0 +1,71 @@
+# (c) Copyright IBM Corp. 2021
+# (c) Copyright Instana Inc. 2020
+
+import importlib
+import os
+import unittest
+import socket
+
+import gevent
+from gevent import monkey
+from instana import apply_gevent_monkey_patch
+
+
+class TestGEventAutoTrace(unittest.TestCase):
+    def setUp(self):
+        # Ensure that the test suite is operational even when Django is installed
+        # but not running or configured
+        os.environ['DJANGO_SETTINGS_MODULE'] = ''
+
+        self.default_patched_modules = ('socket', 'time', 'select', 'os',
+                'threading', 'ssl', 'subprocess', 'signal', 'queue',)
+
+    def tearDown(self):
+        if os.environ.get('INSTANA_GEVENT_MONKEY_OPTIONS'):
+            os.environ.pop('INSTANA_GEVENT_MONKEY_OPTIONS')
+
+        # Clean up after gevent monkey patches, by restore from the saved dict
+        for modname in monkey.saved.keys():
+            try:
+                mod = __import__(modname)
+                importlib.reload(mod)
+                for key in monkey.saved[modname].keys():
+                    setattr(mod, key, monkey.saved[modname][key])
+            except ImportError:
+                pass
+        monkey.saved = {}
+
+
+    def test_default_patch_all(self):
+        apply_gevent_monkey_patch()
+        for module_name in self.default_patched_modules:
+            self.assertTrue(monkey.is_module_patched(module_name),
+                            f"{module_name} is not patched")
+
+    def test_instana_monkey_options_only_time(self):
+        os.environ['INSTANA_GEVENT_MONKEY_OPTIONS'] = (
+                'time,no-socket,no-select,no-os,no-select,no-threading,no-os,'
+                'no-ssl,no-subprocess,''no-signal,no-queue')
+        apply_gevent_monkey_patch()
+
+        self.assertTrue(monkey.is_module_patched('time'), "time module is not patched")
+        not_patched_modules = (m for m in self.default_patched_modules if m not in ('time', 'threading'))
+
+        for module_name in not_patched_modules:
+            self.assertFalse(monkey.is_module_patched(module_name),
+                             f"{module_name} is patched, when it shouldn't be")
+
+
+    def test_instana_monkey_options_only_socket(self):
+        os.environ['INSTANA_GEVENT_MONKEY_OPTIONS'] = (
+                '--socket, --no-time, --no-select, --no-os, --no-queue, --no-threading,'
+                '--no-os, --no-ssl, no-subprocess, --no-signal, --no-select,')
+        apply_gevent_monkey_patch()
+
+        self.assertTrue(monkey.is_module_patched('socket'), "socket module is not patched")
+        not_patched_modules = (m for m in self.default_patched_modules if m not in ('socket', 'threading'))
+
+        for module_name in not_patched_modules:
+            self.assertFalse(monkey.is_module_patched(module_name),
+                             f"{module_name} is patched, when it shouldn't be")
+