add hg and python

sys/lib/python/test/test_operations.py

@@ -0,0 +1,78 @@
+# Python test set -- part 3, built-in operations.
+
+
+print '3. Operations'
+print 'XXX Mostly not yet implemented'
+
+
+print '3.1 Dictionary lookups fail if __cmp__() raises an exception'
+
+class BadDictKey:
+
+    def __hash__(self):
+        return hash(self.__class__)
+
+    def __cmp__(self, other):
+        if isinstance(other, self.__class__):
+            print "raising error"
+            raise RuntimeError, "gotcha"
+        return other
+
+d = {}
+x1 = BadDictKey()
+x2 = BadDictKey()
+d[x1] = 1
+for stmt in ['d[x2] = 2',
+             'z = d[x2]',
+             'x2 in d',
+             'd.has_key(x2)',
+             'd.get(x2)',
+             'd.setdefault(x2, 42)',
+             'd.pop(x2)',
+             'd.update({x2: 2})']:
+    try:
+        exec stmt
+    except RuntimeError:
+        print "%s: caught the RuntimeError outside" % (stmt,)
+    else:
+        print "%s: No exception passed through!"     # old CPython behavior
+
+
+# Dict resizing bug, found by Jack Jansen in 2.2 CVS development.
+# This version got an assert failure in debug build, infinite loop in
+# release build.  Unfortunately, provoking this kind of stuff requires
+# a mix of inserts and deletes hitting exactly the right hash codes in
+# exactly the right order, and I can't think of a randomized approach
+# that would be *likely* to hit a failing case in reasonable time.
+
+d = {}
+for i in range(5):
+    d[i] = i
+for i in range(5):
+    del d[i]
+for i in range(5, 9):  # i==8 was the problem
+    d[i] = i
+
+
+# Another dict resizing bug (SF bug #1456209).
+# This caused Segmentation faults or Illegal instructions.
+
+class X(object):
+    def __hash__(self):
+        return 5
+    def __eq__(self, other):
+        if resizing:
+            d.clear()
+        return False
+d = {}
+resizing = False
+d[X()] = 1
+d[X()] = 2
+d[X()] = 3
+d[X()] = 4
+d[X()] = 5
+# now trigger a resize
+resizing = True
+d[9] = 6
+
+print 'resize bugs not triggered.'