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diff --git a/testfiles/src/cxxtests-to-migrate/preferences-test.h b/testfiles/src/cxxtests-to-migrate/preferences-test.h
new file mode 100644
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+++ b/testfiles/src/cxxtests-to-migrate/preferences-test.h
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * @brief Unit tests for the Preferences object
+ *//*
+ * Authors:
+ * see git history
+ *   Krzysztof Kosiński <tweenk.pl@gmail.com>
+ *
+ * Copyright (C) 2016 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cxxtest/TestSuite.h>
+#include "preferences.h"
+
+#include <glibmm/ustring.h>
+
+// test observer
+class TestObserver : public Inkscape::Preferences::Observer {
+public:
+    TestObserver(Glib::ustring const &path) :
+        Inkscape::Preferences::Observer(path),
+        value(0) {}
+
+    virtual void notify(Inkscape::Preferences::Entry const &val)
+    {
+        value = val.getInt();
+    }
+    int value;
+};
+
+class PreferencesTest : public CxxTest::TestSuite {
+public:
+    void setUp() {
+        prefs = Inkscape::Preferences::get();
+    }
+    void tearDown() {
+        prefs = NULL;
+        Inkscape::Preferences::unload();
+    }
+
+    void testStartingState()
+    {
+        TS_ASSERT_DIFFERS(prefs, static_cast<void*>(0));
+        TS_ASSERT_EQUALS(prefs->isWritable(), true);
+    }
+
+    void testOverwrite()
+    {
+        prefs->setInt("/test/intvalue", 123);
+        prefs->setInt("/test/intvalue", 321);
+        TS_ASSERT_EQUALS(prefs->getInt("/test/intvalue"), 321);
+    }
+
+    void testDefaultReturn()
+    {
+        TS_ASSERT_EQUALS(prefs->getInt("/this/path/does/not/exist", 123), 123);
+    }
+
+    void testLimitedReturn()
+    {
+        prefs->setInt("/test/intvalue", 1000);
+
+        // simple case
+        TS_ASSERT_EQUALS(prefs->getIntLimited("/test/intvalue", 123, 0, 500), 123);
+        // the below may seem quirky but this behaviour is intended
+        TS_ASSERT_EQUALS(prefs->getIntLimited("/test/intvalue", 123, 1001, 5000), 123);
+        // corner cases
+        TS_ASSERT_EQUALS(prefs->getIntLimited("/test/intvalue", 123, 0, 1000), 1000);
+        TS_ASSERT_EQUALS(prefs->getIntLimited("/test/intvalue", 123, 1000, 5000), 1000);
+    }
+
+    void testKeyObserverNotification()
+    {
+        Glib::ustring const path = "/some/random/path";
+        TestObserver obs("/some/random");
+        obs.value = 1;
+        prefs->setInt(path, 5);
+        TS_ASSERT_EQUALS(obs.value, 1); // no notifications sent before adding
+
+        prefs->addObserver(obs);
+        prefs->setInt(path, 10);
+        TS_ASSERT_EQUALS(obs.value, 10);
+        prefs->setInt("/some/other/random/path", 10);
+        TS_ASSERT_EQUALS(obs.value, 10); // value should not change
+
+        prefs->removeObserver(obs);
+        prefs->setInt(path, 15);
+        TS_ASSERT_EQUALS(obs.value, 10); // no notifications sent after removal
+    }
+
+    void testEntryObserverNotification()
+    {
+        Glib::ustring const path = "/some/random/path";
+        TestObserver obs(path);
+        obs.value = 1;
+        prefs->setInt(path, 5);
+        TS_ASSERT_EQUALS(obs.value, 1); // no notifications sent before adding
+
+        prefs->addObserver(obs);
+        prefs->setInt(path, 10);
+        TS_ASSERT_EQUALS(obs.value, 10);
+
+        // test that filtering works properly
+        prefs->setInt("/some/random/value", 1234);
+        TS_ASSERT_EQUALS(obs.value, 10);
+        prefs->setInt("/some/randomvalue", 1234);
+        TS_ASSERT_EQUALS(obs.value, 10);
+        prefs->setInt("/some/random/path2", 1234);
+        TS_ASSERT_EQUALS(obs.value, 10);
+
+        prefs->removeObserver(obs);
+        prefs->setInt(path, 15);
+        TS_ASSERT_EQUALS(obs.value, 10); // no notifications sent after removal
+    }
+
+    void testPreferencesEntryMethods()
+    {
+        prefs->setInt("/test/prefentry", 100);
+        Inkscape::Preferences::Entry val = prefs->getEntry("/test/prefentry");
+        TS_ASSERT(val.isValid());
+        TS_ASSERT_EQUALS(val.getPath(), "/test/prefentry");
+        TS_ASSERT_EQUALS(val.getEntryName(), "prefentry");
+        TS_ASSERT_EQUALS(val.getInt(), 100);
+    }
+private:
+    Inkscape::Preferences *prefs;
+};
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :