--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/regression/regression.py	Tue Mar 25 23:17:24 2008 -0700
@@ -0,0 +1,123 @@
+#! /usr/bin/env python
+# regression.py adapted from python language regression scripts.
+
+"""Regression test.
+
+This will find all modules whose name is "test_*" in the tests
+directory, and run them.
+
+Command line options:
+
+-v: verbose   -- run tests in verbose mode with output to stdout
+-g: generate  -- write the output file for a test instead of comparing it
+
+If non-option arguments are present, they are names for tests to run.
+If no test names are given, all tests are run.
+
+"""
+
+import sys
+import os
+import getopt
+
+verbose = 0
+generate = 0
+
+def main(tests = None, testdir = None):
+    """Execute regression tests.
+
+    Arguments:
+    tests -- a list of strings containing test names (optional)
+    testdir -- the directory in which to look for tests (optional)
+    """
+
+    global verbose
+    global generate
+    
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], 'vg')
+    except getopt.error, msg:
+        print msg
+        print __doc__
+        return 2
+
+    for o, a in opts:
+        if o == '-v': verbose = 1
+        if o == '-g': generate = 1
+
+    if not os.path.exists('./traces'):
+        os.mkdir('./traces')
+    
+    bad = []
+
+    if not testdir:
+        testdir = os.path.join(os.curdir, "tests")
+
+    if not os.path.exists(testdir):
+        print "Tests directory does not exist"
+        return 3
+    
+    if verbose:
+        print "tests directory: ", testdir
+
+    sys.path.append(testdir)
+        
+    for i in range(len(args)):
+        if args[i][-3:] == '.py':
+            args[i] = args[i][:-3]
+
+    if not tests:
+        tests = args
+
+    if not tests:
+        tests = findtests(testdir)
+
+    for test in tests:
+        if verbose:
+            print "main(): running test", test
+        result = runtest(test)
+        if result == 0:
+            print "PASS ", test
+        else:
+            bad.append(test)
+            print "FAIL ", test
+
+    return len(bad) > 0
+
+def findtests(testdir):
+    """Return a list of test modules in the test directory
+
+    Arguments:
+    testdir -- the directory to look in for tests
+    """
+    if verbose:
+        print "findtests(", testdir, ")"
+    if verbose:
+        print "findtests(): look in ", testdir
+
+    names = os.listdir(testdir)
+    if verbose:
+        print "findtests(): found ", names
+    tests = []
+    for name in names:
+        if name[:5] == "test_" and name[-3:] == ".py":
+            testname = name[:-3]
+            tests.append(testname)
+    tests.sort()
+    if verbose:
+        print "findtests(): found tests ", tests
+    return tests
+
+def runtest(test):
+    """Run a single test.
+
+    Arguments:
+    test -- the name of the test
+    """
+    if verbose:
+        print "runtest(): run ", test
+    mod = __import__(test, globals(), locals(), [])
+    return mod.run(verbose, generate)
+
+if __name__ == '__main__':
+    sys.exit(main())