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diff --git a/src/libs/xpcom18a4/python/test/test_components.py b/src/libs/xpcom18a4/python/test/test_components.py
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+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is the Python XPCOM language bindings.
+#
+# The Initial Developer of the Original Code is
+# ActiveState Tool Corp.
+# Portions created by the Initial Developer are Copyright (C) 2000, 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Hammond <markh@activestate.com> (original author)
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+"""Tests the "xpcom.components" object.
+"""
+
+import xpcom.components
+from pyxpcom_test_tools import suite_from_functions, testmain
+
+if not __debug__:
+    raise RuntimeError, "This test uses assert, so must be run in debug mode"
+
+def test_interfaces():
+    "Test the xpcom.components.interfaces object"
+
+    iid = xpcom.components.interfaces.nsISupports
+    assert iid == xpcom._xpcom.IID_nsISupports, "Got the wrong IID!"
+    iid = xpcom.components.interfaces['nsISupports']
+    assert iid == xpcom._xpcom.IID_nsISupports, "Got the wrong IID!"
+    
+    # Test dictionary semantics
+    num_fetched = num_nsisupports = 0
+    for name, iid in xpcom.components.interfaces.items():
+        num_fetched = num_fetched + 1
+        if name == "nsISupports":
+            num_nsisupports = num_nsisupports + 1
+            assert iid == xpcom._xpcom.IID_nsISupports, "Got the wrong IID!"
+        assert xpcom.components.interfaces[name] == iid
+    # Check all the lengths match.
+    assert len(xpcom.components.interfaces.keys()) == len(xpcom.components.interfaces.values()) == \
+               len(xpcom.components.interfaces.items()) == len(xpcom.components.interfaces) == \
+               num_fetched, "The collection lengths were wrong"
+    assert num_nsisupports == 1, "Didnt find exactly 1 nsiSupports!"
+
+def test_classes():
+    # Need a well-known contractID here?
+    prog_id = "@mozilla.org/supports-array;1"
+    clsid = xpcom.components.ID("{bda17d50-0d6b-11d3-9331-00104ba0fd40}")
+
+    # Check we can create the instance (dont check we can do anything with it tho!)
+    klass = xpcom.components.classes[prog_id]
+    instance = klass.createInstance()
+    
+    # Test dictionary semantics
+    num_fetched = num_mine = 0
+    for name, klass in xpcom.components.classes.items():
+        num_fetched = num_fetched + 1
+        if name == prog_id:
+            assert klass.clsid == clsid, "Eeek - didn't get the correct IID - got %s" %klass.clsid
+            num_mine = num_mine + 1
+
+# xpcom appears to add charset info to the contractid!?         
+#        assert xpcom.components.classes[name].contractid == prog_id, "Expected '%s', got '%s'" % (prog_id, xpcom.components.classes[name].contractid)
+    # Check all the lengths match.
+    if len(xpcom.components.classes.keys()) == len(xpcom.components.classes.values()) == \
+               len(xpcom.components.classes.items()) == len(xpcom.components.classes) == \
+               num_fetched:
+        pass
+    else:
+        raise RuntimeError, "The collection lengths were wrong"
+    if num_fetched <= 0:
+        raise RuntimeError, "Didnt get any classes!!!"
+    if num_mine != 1:
+        raise RuntimeError, "Didnt find exactly 1 of my contractid! (%d)" % (num_mine,)
+    
+def test_id():
+    id = xpcom.components.ID(str(xpcom._xpcom.IID_nsISupports))
+    assert id == xpcom._xpcom.IID_nsISupports
+
+# Make this test run under our std test suite
+def suite():
+    return suite_from_functions(test_interfaces, test_classes, test_id)
+
+if __name__=='__main__':
+    testmain()