Revamp Python regression tests suite (#2022)

* Fix Python regression test suite (partial)

* Fix Python regression test suite

* Add a test for mapping at high addresses

* Add ctl tests

tests/regress/regress.py

@@ -1,34 +1,64 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
+import glob
+import logging
+import os
 import unittest
 
-from os.path import dirname, basename, isfile
-import glob
-
-# Find all unittest type in this directory and run it.
 
 class RegressTest(unittest.TestCase):
-    pass
+    """Regress test case dummy class.
+    """
+
+
+def __setup_logger(name):
+    """Set up a unified logger for all tests.
+    """
+
+    instance = logging.getLogger(name)
+    instance.propagate = False
+
+    handler = logging.StreamHandler()
+    formatter = logging.Formatter('[%(levelname)s] %(message)s')
+
+    if not instance.hasHandlers():
+        handler.setFormatter(formatter)
+        instance.addHandler(handler)
+
+    return instance
+
+
+logger = __setup_logger('UnicornRegress')
+logger.setLevel(logging.INFO)
+
 
 def main():
     unittest.main()
 
+
 if __name__ == '__main__':
-    directory = dirname(__file__)
-    if directory == '':
-        directory = '.'
-    modules = glob.glob(directory+"/*.py")
-    __all__ = [ basename(f)[:-3] for f in modules if isfile(f)]
     suite = unittest.TestSuite()
 
-    for module in __all__:
-        m = __import__(module)
-        for cl in dir(m):
-            try:
-                realcl = getattr(m,cl)
-                if issubclass(realcl, unittest.TestCase):
-                    suite.addTest(realcl())
-            except Exception as e:
-                pass
+    logger.info('starting discovery')
+
+    # Find all unittest type in this directory and run it.
+    directory = os.path.dirname(__file__) or '.'
+    pyfiles = glob.glob(directory + '/*.py')
+    modules = [os.path.splitext(os.path.basename(f))[0] for f in pyfiles if os.path.isfile(f) and f != __file__]
+
+    logger.info('%d test modules found', len(modules))
+
+    for mname in modules:
+        try:
+            module = __import__(mname)
+        except ImportError as ex:
+            logger.error('could not load %s: %s is missing', mname, ex.name)
+        else:
+            tests = unittest.defaultTestLoader.loadTestsFromModule(module)
+            suite.addTests(tests)
+
+            logger.debug('found %d test cases in %s', tests.countTestCases(), mname)
+
+    logger.info('%d test cases were added', suite.countTestCases())
 
     unittest.TextTestRunner().run(suite)