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diff --git a/src/VBox/ValidationKit/testanalysis/diff.py b/src/VBox/ValidationKit/testanalysis/diff.py
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+# -*- coding: utf-8 -*-
+# $Id: diff.py $
+
+"""
+Diff two test sets.
+"""
+
+__copyright__ = \
+"""
+Copyright (C) 2010-2019 Oracle Corporation
+
+This file is part of VirtualBox Open Source Edition (OSE), as
+available from http://www.virtualbox.org. This file is free software;
+you can redistribute it and/or modify it under the terms of the GNU
+General Public License (GPL) as published by the Free Software
+Foundation, in version 2 as it comes in the "COPYING" file of the
+VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+
+The contents of this file may alternatively be used under the terms
+of the Common Development and Distribution License Version 1.0
+(CDDL) only, as it comes in the "COPYING.CDDL" file of the
+VirtualBox OSE distribution, in which case the provisions of the
+CDDL are applicable instead of those of the GPL.
+
+You may elect to license modified versions of this file under the
+terms and conditions of either the GPL or the CDDL or both.
+"""
+__version__ = "$Revision: 127855 $"
+__all__ = ['BaselineDiff', ];
+
+
+def _findBaselineTest(oBaseline, oTest):
+ """ Recursively finds the test in oBaseline corresponding to oTest. """
+ if oTest.oParent is None:
+ return oBaseline;
+ oBaseline = _findBaselineTest(oBaseline, oTest.oParent);
+ if oBaseline is not None:
+ for oBaseTest in oBaseline.aoChildren:
+ if oBaseTest.sName == oTest.sName:
+ return oBaseTest;
+ return None;
+
+def _findBaselineTestValue(oBaseline, oValue):
+ """ Finds the baseline value corresponding to oValue. """
+ oBaseTest = _findBaselineTest(oBaseline, oValue.oTest);
+ if oBaseTest is not None:
+ for oBaseValue in oBaseTest.aoValues:
+ if oBaseValue.sName == oValue.sName:
+ return oBaseValue;
+ return None;
+
+def baselineDiff(oTestTree, oBaseline):
+ """
+ Diffs oTestTree against oBaseline, adding diff info to oTestTree.
+ Returns oTestTree on success, None on failure (complained already).
+ """
+
+ aoStack = [];
+ aoStack.append((oTestTree, 0));
+ while len(aoStack) > 0:
+ oCurTest, iChild = aoStack.pop();
+
+ # depth first
+ if iChild < len(oCurTest.aoChildren):
+ aoStack.append((oCurTest, iChild + 1));
+ aoStack.append((oCurTest.aoChildren[iChild], 0));
+ continue;
+
+ # do value diff.
+ for i in range(len(oCurTest.aoValues)):
+ oBaseVal = _findBaselineTestValue(oBaseline, oCurTest.aoValues[i]);
+ if oBaseVal is not None:
+ try:
+ lBase = long(oBaseVal.sValue);
+ lTest = long(oCurTest.aoValues[i].sValue);
+ except:
+ try:
+ if oBaseVal.sValue == oCurTest.aoValues[i].sValue:
+ oCurTest.aoValues[i].sValue += '|';
+ else:
+ oCurTest.aoValues[i].sValue += '|%s' % (oBaseVal.sValue);
+ except:
+ oCurTest.aoValues[i].sValue += '|%s' % (oBaseVal.sValue);
+ else:
+ if lTest > lBase:
+ oCurTest.aoValues[i].sValue += '|+%u' % (lTest - lBase);
+ elif lTest < lBase:
+ oCurTest.aoValues[i].sValue += '|-%u' % (lBase - lTest);
+ else:
+ oCurTest.aoValues[i].sValue += '|0';
+ else:
+ oCurTest.aoValues[i].sValue += '|N/A';
+
+ return oTestTree;