Example of refactoring using rope library.

tools/telemetry/third_party/rope/ropetest/testutils.py

+import os.path
+import shutil
+import sys
+import logging
+logging.basicConfig(format='%(levelname)s:%(funcName)s:%(message)s',
+                    level=logging.INFO)
+
+import rope.base.project
+from rope.contrib import generate
+
+
+def sample_project(root=None, foldername=None, **kwds):
+    if root is None:
+        root = 'sample_project'
+        if foldername:
+            root = foldername
+        # HACK: Using ``/dev/shm/`` for faster tests
+        if os.name == 'posix':
+            if os.path.isdir('/dev/shm') and os.access('/dev/shm', os.W_OK):
+                    root = '/dev/shm/' + root
+            elif os.path.isdir('/tmp') and os.access('/tmp', os.W_OK):
+                    root = '/tmp/' + root
+    logging.debug("Using %s as root of the project.", root)
+    # Using these prefs for faster tests
+    prefs = {'save_objectdb': False, 'save_history': False,
+             'validate_objectdb': False, 'automatic_soa': False,
+             'ignored_resources': ['.ropeproject', '*.pyc'],
+             'import_dynload_stdmods': False}
+    prefs.update(kwds)
+    remove_recursively(root)
+    project = rope.base.project.Project(root, **prefs)
+    return project
+
+create_module = generate.create_module
+create_package = generate.create_package
+
+
+def remove_project(project):
+    project.close()
+    remove_recursively(project.address)
+
+
+def remove_recursively(path):
+    import time
+    # windows sometimes raises exceptions instead of removing files
+    if os.name == 'nt' or sys.platform == 'cygwin':
+        for i in range(12):
+            try:
+                _remove_recursively(path)
+            except OSError as e:
+                if e.errno not in (13, 16, 32):
+                    raise
+                time.sleep(0.3)
+            else:
+                break
+    else:
+        _remove_recursively(path)
+
+
+def _remove_recursively(path):
+    if not os.path.exists(path):
+        return
+    if os.path.isfile(path):
+        os.remove(path)
+    else:
+        shutil.rmtree(path)
+
+
+def run_only_for_25(func):
+    """Should be used as a decorator for a unittest.TestCase test method"""
+    if sys.version_info >= (2, 5, 0):
+        return func
+    else:
+        def do_nothing(self):
+            pass
+        return do_nothing
+
+
+def only_for(version):
+    """Should be used as a decorator for a unittest.TestCase test method"""
+    def decorator(func):
+        if sys.version >= version:
+            return func
+        else:
+            def do_nothing(self):
+                pass
+            return do_nothing
+    return decorator
+
+
+def run_only_for_unix(func):
+    """Should be used as a decorator for a unittest.TestCase test method"""
+    if os.name == 'posix':
+        return func
+    else:
+        def do_nothing(self):
+            pass
+        return do_nothing