Index: trunk/test/unit/org/openstreetmap/josm/data/validation/tests/TagCheckerTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/validation/tests/TagCheckerTest.java	(revision 8753)
+++ trunk/test/unit/org/openstreetmap/josm/data/validation/tests/TagCheckerTest.java	(revision 8753)
@@ -0,0 +1,68 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.data.validation.tests;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.openstreetmap.josm.JOSMFixture;
+import org.openstreetmap.josm.data.osm.OsmPrimitive;
+import org.openstreetmap.josm.data.osm.OsmUtils;
+import org.openstreetmap.josm.data.validation.TestError;
+import org.openstreetmap.josm.gui.tagging.TaggingPresets;
+
+public class TagCheckerTest {
+    /**
+     * Setup test.
+     */
+    @BeforeClass
+    public static void setUp() {
+        JOSMFixture.createUnitTestFixture().init();
+        TaggingPresets.readFromPreferences();
+    }
+
+    List<TestError> test(OsmPrimitive primitive) throws IOException {
+        final TagChecker checker = new TagChecker();
+        checker.initialize();
+        checker.startTest(null);
+        checker.check(primitive);
+        return checker.getErrors();
+    }
+
+    @Test
+    public void testInvalidKey() throws Exception {
+        final List<TestError> errors = test(OsmUtils.createPrimitive("node Name=Main"));
+        assertThat(errors.size(), is(1));
+        assertThat(errors.get(0).getMessage(), is("Misspelled property key"));
+        assertThat(errors.get(0).getDescription(), is("Key 'Name' looks like 'name'."));
+    }
+
+    @Test
+    public void testMisspelledKey() throws Exception {
+        final List<TestError> errors = test(OsmUtils.createPrimitive("node landuse;=forest"));
+        assertThat(errors.size(), is(1));
+        assertThat(errors.get(0).getMessage(), is("Misspelled property key"));
+        assertThat(errors.get(0).getDescription(), is("Key 'landuse;' looks like 'landuse'."));
+    }
+
+    @Test
+    public void testTranslatedNameKey() throws Exception {
+        final List<TestError> errors = test(OsmUtils.createPrimitive("node namez=Baz"));
+        assertThat(errors.size(), is(1));
+        assertThat(errors.get(0).getMessage(), is("Presets do not contain property key"));
+        assertThat(errors.get(0).getDescription(), is("Key 'namez' not in presets."));
+    }
+
+    @Test
+    public void testMisspelledTag() throws Exception {
+        final List<TestError> errors = test(OsmUtils.createPrimitive("node landuse=forrest"));
+        assertThat(errors.size(), is(1));
+        assertThat(errors.get(0).getMessage(), is("Presets do not contain property value"));
+        assertThat(errors.get(0).getDescription(), is("Value 'forrest' for key 'landuse' not in presets."));
+    }
+
+}