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diff --git a/indra/newview/tests/llviewerhelputil_test.cpp b/indra/newview/tests/llviewerhelputil_test.cpp
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+/**
+ * @file llviewerhelputil_test.cpp
+ * @brief LLViewerHelpUtil tests
+ * @author Tofu Linden
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+// Precompiled header
+#include "../llviewerprecompiledheaders.h"
+
+#include "../test/lltut.h"
+
+#include "../llviewerhelputil.h"
+#include "../llweb.h"
+#include "llcontrol.h"
+
+#include <iostream>
+
+// values for all of the supported substitutions parameters
+static std::string gHelpURL;
+static std::string gVersion;
+static std::string gChannel;
+static std::string gLanguage;
+static std::string gGrid;
+static std::string gOS;
+
+//----------------------------------------------------------------------------
+// Mock objects for the dependencies of the code we're testing
+
+LLControlGroup::LLControlGroup(const std::string& name)
+ : LLInstanceTracker<LLControlGroup, std::string>(name) {}
+LLControlGroup::~LLControlGroup() {}
+BOOL LLControlGroup::declareString(const std::string& name,
+ const std::string& initial_val,
+ const std::string& comment,
+ BOOL persist) {return TRUE;}
+void LLControlGroup::setString(const std::string& name, const std::string& val){}
+std::string LLControlGroup::getString(const std::string& name)
+{
+ if (name == "HelpURLFormat")
+ return gHelpURL;
+ return "";
+}
+LLControlGroup gSavedSettings("test");
+
+static void substitute_string(std::string &input, const std::string &search, const std::string &replace)
+{
+ size_t pos = input.find(search);
+ while (pos != std::string::npos)
+ {
+ input = input.replace(pos, search.size(), replace);
+ pos = input.find(search);
+ }
+}
+
+class LLAgent
+{
+public:
+ LLAgent() {}
+ ~LLAgent() {}
+#ifdef __GNUC__
+ __attribute__ ((noinline))
+#endif
+ bool isGodlike() const { return FALSE; }
+};
+LLAgent gAgent;
+
+std::string LLWeb::expandURLSubstitutions(const std::string &url,
+ const LLSD &default_subs)
+{
+ (void)gAgent.isGodlike(); // ref symbol to stop compiler from stripping it
+ std::string new_url = url;
+ substitute_string(new_url, "[TOPIC]", default_subs["TOPIC"].asString());
+ substitute_string(new_url, "[VERSION]", gVersion);
+ substitute_string(new_url, "[CHANNEL]", gChannel);
+ substitute_string(new_url, "[LANGUAGE]", gLanguage);
+ substitute_string(new_url, "[GRID]", gGrid);
+ substitute_string(new_url, "[OS]", gOS);
+ return new_url;
+}
+
+
+//----------------------------------------------------------------------------
+
+namespace tut
+{
+ struct viewerhelputil
+ {
+ };
+
+ typedef test_group<viewerhelputil> viewerhelputil_t;
+ typedef viewerhelputil_t::object viewerhelputil_object_t;
+ tut::viewerhelputil_t tut_viewerhelputil("LLViewerHelpUtil");
+
+ template<> template<>
+ void viewerhelputil_object_t::test<1>()
+ {
+ std::string topic("test_topic");
+ std::string subresult;
+
+ gHelpURL = "fooformat";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("no substitution tags", subresult, "fooformat");
+
+ gHelpURL = "";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("blank substitution format", subresult, "");
+
+ gHelpURL = "[TOPIC]";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("topic name", subresult, "test_topic");
+
+ gHelpURL = "[LANGUAGE]";
+ gLanguage = "";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("simple substitution with blank", subresult, "");
+
+ gHelpURL = "[LANGUAGE]";
+ gLanguage = "Esperanto";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("simple substitution", subresult, "Esperanto");
+
+ gHelpURL = "http://secondlife.com/[LANGUAGE]";
+ gLanguage = "Gaelic";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("simple substitution with url", subresult, "http://secondlife.com/Gaelic");
+
+ gHelpURL = "[XXX]";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("unknown substitution", subresult, "[XXX]");
+
+ gHelpURL = "[LANGUAGE]/[LANGUAGE]";
+ gLanguage = "Esperanto";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("multiple substitution", subresult, "Esperanto/Esperanto");
+
+ gHelpURL = "http://[CHANNEL]/[VERSION]/[LANGUAGE]/[OS]/[GRID]/[XXX]";
+ gChannel = "Second Life Test";
+ gVersion = "2.0";
+ gLanguage = "gaelic";
+ gOS = "AmigaOS 2.1";
+ gGrid = "mysim";
+ subresult = LLViewerHelpUtil::buildHelpURL(topic);
+ ensure_equals("complex substitution", subresult, "http://Second Life Test/2.0/gaelic/AmigaOS 2.1/mysim/[XXX]");
+ }
+}