Index: trunk/test/unit/org/openstreetmap/josm/gui/help/HelpBrowserTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/gui/help/HelpBrowserTest.java	(revision 9644)
+++ trunk/test/unit/org/openstreetmap/josm/gui/help/HelpBrowserTest.java	(revision 9644)
@@ -0,0 +1,125 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.gui.help;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.openstreetmap.josm.JOSMFixture;
+import org.openstreetmap.josm.tools.LanguageInfo.LocaleType;
+
+/**
+ * Unit tests of {@link HelpBrowser} class.
+ */
+public class HelpBrowserTest {
+
+    private static final String URL_1 = "https://josm.openstreetmap.de/wiki/Help";
+    private static final String URL_2 = "https://josm.openstreetmap.de/wiki/Introduction";
+    private static final String URL_3 = "https://josm.openstreetmap.de/javadoc";
+
+    /**
+     * Setup tests
+     */
+    @BeforeClass
+    public static void setUpBeforeClass() {
+        JOSMFixture.createUnitTestFixture().init();
+    }
+
+    static IHelpBrowser newHelpBrowser() {
+        return new IHelpBrowser() {
+
+            private final HelpBrowserHistory history = new HelpBrowserHistory(this);
+            private String url;
+
+            @Override
+            public void openUrl(String url) {
+                history.setCurrentUrl(url);
+                this.url = url;
+            }
+
+            @Override
+            public void openHelpTopic(String relativeHelpTopic) {
+                openUrl(HelpUtil.getHelpTopicUrl(HelpUtil.buildAbsoluteHelpTopic(relativeHelpTopic, LocaleType.ENGLISH)));
+            }
+
+            @Override
+            public String getUrl() {
+                return url;
+            }
+
+            @Override
+            public HelpBrowserHistory getHistory() {
+                return history;
+            }
+        };
+    }
+
+    /**
+     * Unit test of {@link HelpBrowser.BackAction} and {@link HelpBrowser.ForwardAction} classes.
+     */
+    @Test
+    public void testBackAndForwardActions() {
+        IHelpBrowser browser = newHelpBrowser();
+        browser.openUrl(URL_1);
+        assertEquals(URL_1, browser.getUrl());
+        browser.openUrl(URL_2);
+        assertEquals(URL_2, browser.getUrl());
+        new HelpBrowser.BackAction(browser).actionPerformed(null);
+        assertEquals(URL_1, browser.getUrl());
+        new HelpBrowser.ForwardAction(browser).actionPerformed(null);
+        assertEquals(URL_2, browser.getUrl());
+    }
+
+    /**
+     * Unit test of {@link HelpBrowser.HomeAction} class.
+     */
+    @Test
+    public void testHomeAction() {
+        IHelpBrowser browser = newHelpBrowser();
+        assertNull(browser.getUrl());
+        new HelpBrowser.HomeAction(browser).actionPerformed(null);
+        assertEquals(URL_1, browser.getUrl());
+    }
+
+    /**
+     * Unit test of {@link HelpBrowser.EditAction} class.
+     */
+    @Test
+    public void testEditAction() {
+        IHelpBrowser browser = newHelpBrowser();
+        assertNull(browser.getUrl());
+        new HelpBrowser.EditAction(browser).actionPerformed(null);
+
+        browser.openUrl(URL_2);
+        assertEquals(URL_2, browser.getUrl());
+        new HelpBrowser.EditAction(browser).actionPerformed(null);
+
+        browser.openUrl(URL_3);
+        assertEquals(URL_3, browser.getUrl());
+        new HelpBrowser.EditAction(browser).actionPerformed(null);
+    }
+
+    /**
+     * Unit test of {@link HelpBrowser.OpenInBrowserAction} class.
+     */
+    @Test
+    public void testOpenInBrowserAction() {
+        IHelpBrowser browser = newHelpBrowser();
+        browser.openUrl(URL_1);
+        assertEquals(URL_1, browser.getUrl());
+        new HelpBrowser.OpenInBrowserAction(browser).actionPerformed(null);
+    }
+
+    /**
+     * Unit test of {@link HelpBrowser.ReloadAction} class.
+     */
+    @Test
+    public void testReloadAction() {
+        IHelpBrowser browser = newHelpBrowser();
+        browser.openUrl(URL_1);
+        assertEquals(URL_1, browser.getUrl());
+        new HelpBrowser.ReloadAction(browser).actionPerformed(null);
+        assertEquals(URL_1, browser.getUrl());
+    }
+}