Index: trunk/test/unit/org/openstreetmap/josm/tools/LanguageInfoTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/LanguageInfoTest.java	(revision 14642)
+++ trunk/test/unit/org/openstreetmap/josm/tools/LanguageInfoTest.java	(revision 14642)
@@ -0,0 +1,79 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.tools;
+
+import java.util.Arrays;
+import java.util.Locale;
+
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import org.junit.Assert;
+import org.junit.Rule;
+import org.junit.Test;
+import org.openstreetmap.josm.testutils.JOSMTestRules;
+
+/**
+ * Unit tests of {@link LanguageInfo}.
+ */
+public class LanguageInfoTest {
+
+    /**
+     * Setup test.
+     */
+    @Rule
+    @SuppressFBWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
+    public JOSMTestRules test = new JOSMTestRules().i18n("ca@valencia");
+
+    private static final Locale DE_DE = Locale.GERMANY;
+    private static final Locale PT_BR = new Locale("pt", "BR");
+    private static final Locale CA_ES_VALENCIA = new Locale("ca", "ES", "valencia");
+
+    /**
+     * Unit test of {@link LanguageInfo#getWikiLanguagePrefix}.
+     */
+    @Test
+    public void getWikiLanguagePrefix() {
+        Assert.assertEquals("De:", LanguageInfo.getWikiLanguagePrefix(DE_DE, LanguageInfo.LocaleType.DEFAULT));
+        Assert.assertEquals("Pt_BR:", LanguageInfo.getWikiLanguagePrefix(PT_BR, LanguageInfo.LocaleType.DEFAULT));
+    }
+
+    /**
+     * Unit test of {@link LanguageInfo#getJOSMLocaleCode}.
+     */
+    @Test
+    public void getJOSMLocaleCode() {
+        Assert.assertEquals("de", LanguageInfo.getJOSMLocaleCode(DE_DE));
+        Assert.assertEquals("pt_BR", LanguageInfo.getJOSMLocaleCode(PT_BR));
+        Assert.assertEquals("ca@valencia", LanguageInfo.getJOSMLocaleCode(CA_ES_VALENCIA));
+    }
+
+    /**
+     * Unit test of {@link LanguageInfo#getJavaLocaleCode}.
+     */
+    @Test
+    public void getJavaLocaleCode() {
+        Assert.assertEquals("ca__valencia", LanguageInfo.getJavaLocaleCode("ca@valencia"));
+    }
+
+    /**
+     * Unit test of {@link LanguageInfo#getLanguageCodeXML}.
+     */
+    @Test
+    public void getLanguageCodeXML() {
+        Assert.assertEquals("ca-valencia.", LanguageInfo.getLanguageCodeXML());
+    }
+
+    /**
+     * Unit test of {@link LanguageInfo#getLanguageCodeManifest}.
+     */
+    @Test
+    public void getLanguageCodeManifest() {
+        Assert.assertEquals("ca-valencia_", LanguageInfo.getLanguageCodeManifest());
+    }
+
+    /**
+     * Unit test of {@link LanguageInfo#getLanguageCodes}.
+     */
+    @Test
+    public void getLanguageCodes() {
+        Assert.assertEquals(Arrays.asList("ca_ES@valencia", "ca@valencia", "ca_ES", "ca"), LanguageInfo.getLanguageCodes(CA_ES_VALENCIA));
+    }
+}