Index: /trunk/src/org/openstreetmap/josm/data/oauth/SignpostAdapters.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/oauth/SignpostAdapters.java	(revision 10200)
+++ /trunk/src/org/openstreetmap/josm/data/oauth/SignpostAdapters.java	(revision 10201)
@@ -20,6 +20,15 @@
     }
 
+    /**
+     * OAuth provider.
+     */
     public static class OAuthProvider extends AbstractOAuthProvider {
 
+        /**
+         * Constructs a new {@code OAuthProvider}.
+         * @param requestTokenEndpointUrl request token endpoint URL
+         * @param accessTokenEndpointUrl access token endpoint URL
+         * @param authorizationWebsiteUrl authorization website URL
+         */
         public OAuthProvider(String requestTokenEndpointUrl, String accessTokenEndpointUrl, String authorizationWebsiteUrl) {
             super(requestTokenEndpointUrl, accessTokenEndpointUrl, authorizationWebsiteUrl);
@@ -46,6 +55,14 @@
     }
 
+    /**
+     * OAuth consumer.
+     */
     public static class OAuthConsumer extends AbstractOAuthConsumer {
 
+        /**
+         * Constructs a new {@code OAuthConsumer}.
+         * @param consumerKey consumer key
+         * @param consumerSecret consumer secret
+         */
         public OAuthConsumer(String consumerKey, String consumerSecret) {
             super(consumerKey, consumerSecret);
@@ -58,6 +75,6 @@
     }
 
-    private static class HttpRequest implements oauth.signpost.http.HttpRequest {
-        private final HttpClient request;
+    static final class HttpRequest implements oauth.signpost.http.HttpRequest {
+        final HttpClient request;
 
         HttpRequest(HttpClient request) {
@@ -111,6 +128,6 @@
     }
 
-    private static class HttpResponse implements oauth.signpost.http.HttpResponse {
-        private final HttpClient.Response response;
+    static final class HttpResponse implements oauth.signpost.http.HttpResponse {
+        final HttpClient.Response response;
 
         HttpResponse(HttpClient.Response response) {
@@ -138,4 +155,3 @@
         }
     }
-
 }
Index: /trunk/test/unit/org/openstreetmap/josm/data/oauth/OAuthParametersTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/data/oauth/OAuthParametersTest.java	(revision 10200)
+++ /trunk/test/unit/org/openstreetmap/josm/data/oauth/OAuthParametersTest.java	(revision 10201)
@@ -5,9 +5,12 @@
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
-import nl.jqno.equalsverifier.EqualsVerifier;
 
+import org.junit.BeforeClass;
 import org.junit.Test;
+import org.openstreetmap.josm.JOSMFixture;
 import org.openstreetmap.josm.Main;
 import org.openstreetmap.josm.io.OsmApi;
+
+import nl.jqno.equalsverifier.EqualsVerifier;
 
 /**
@@ -15,4 +18,12 @@
  */
 public class OAuthParametersTest {
+
+    /**
+     * Setup test.
+     */
+    @BeforeClass
+    public static void setUpBeforeClass() {
+        JOSMFixture.createUnitTestFixture().init();
+    }
 
     /**
@@ -34,4 +45,12 @@
 
     /**
+     * Unit test of method {@link OAuthParameters#createFromPreferences}.
+     */
+    @Test
+    public void testCreateFromPreferences() {
+        assertNotNull(OAuthParameters.createFromPreferences(Main.pref));
+    }
+
+    /**
      * Unit test of methods {@link OAuthParameters#equals} and {@link OAuthParameters#hashCode}.
      */
Index: /trunk/test/unit/org/openstreetmap/josm/data/oauth/OAuthTokenTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/data/oauth/OAuthTokenTest.java	(revision 10200)
+++ /trunk/test/unit/org/openstreetmap/josm/data/oauth/OAuthTokenTest.java	(revision 10201)
@@ -4,8 +4,9 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
+
+import org.junit.Test;
+
 import nl.jqno.equalsverifier.EqualsVerifier;
 import oauth.signpost.OAuthConsumer;
-
-import org.junit.Test;
 
 /**
@@ -25,4 +26,5 @@
         assertEquals(defCon.getToken(), defTok.getKey());
         assertEquals(defCon.getTokenSecret(), defTok.getSecret());
+        assertEquals(defTok, new OAuthToken(defTok));
     }
 
Index: /trunk/test/unit/org/openstreetmap/josm/data/oauth/SignpostAdaptersTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/data/oauth/SignpostAdaptersTest.java	(revision 10201)
+++ /trunk/test/unit/org/openstreetmap/josm/data/oauth/SignpostAdaptersTest.java	(revision 10201)
@@ -0,0 +1,99 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.data.oauth;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.openstreetmap.josm.JOSMFixture;
+import org.openstreetmap.josm.data.oauth.SignpostAdapters.HttpRequest;
+import org.openstreetmap.josm.data.oauth.SignpostAdapters.HttpResponse;
+import org.openstreetmap.josm.data.oauth.SignpostAdapters.OAuthConsumer;
+import org.openstreetmap.josm.tools.HttpClient;
+
+/**
+ * Unit tests for class {@link SignpostAdapters}.
+ */
+public class SignpostAdaptersTest {
+
+    /**
+     * Setup test.
+     */
+    @BeforeClass
+    public static void setUpBeforeClass() {
+        JOSMFixture.createUnitTestFixture().init();
+    }
+
+    private static HttpClient newClient() throws MalformedURLException {
+        return HttpClient.create(new URL("https://www.openstreetmap.org"));
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.OAuthConsumer#wrap}.
+     * @throws MalformedURLException never
+     */
+    @Test
+    public void testOAuthConsumerWrap() throws MalformedURLException {
+        assertNotNull(new OAuthConsumer("", "").wrap(newClient()));
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.HttpRequest#getMessagePayload}.
+     * @throws IOException never
+     */
+    @Test
+    public void testHttpRequestGetMessagePayload() throws IOException {
+        assertNull(new HttpRequest(newClient()).getMessagePayload());
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.HttpRequest#setRequestUrl}.
+     * @throws IOException never
+     */
+    @Test(expected = IllegalStateException.class)
+    public void testHttpRequestSetRequestUrl() throws IOException {
+        new HttpRequest(newClient()).setRequestUrl(null);
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.HttpRequest#getAllHeaders}.
+     * @throws IOException never
+     */
+    @Test(expected = IllegalStateException.class)
+    public void testHttpRequestGetAllHeaders() throws IOException {
+        new HttpRequest(newClient()).getAllHeaders();
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.HttpRequest#unwrap}.
+     * @throws IOException never
+     */
+    @Test(expected = IllegalStateException.class)
+    public void testHttpRequestUnwrap() throws IOException {
+        new HttpRequest(newClient()).unwrap();
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.HttpResponse#getReasonPhrase()}.
+     * @throws Exception never
+     */
+    @Test
+    public void testHttpResponseGetReasonPhrase() throws Exception {
+        assertEquals("OK", new HttpResponse(new HttpRequest(newClient()).request.connect()).getReasonPhrase());
+    }
+
+    /**
+     * Unit test of method {@link SignpostAdapters.HttpResponse#unwrap}.
+     * @throws IOException never
+     */
+    @Test(expected = IllegalStateException.class)
+    public void testHttpResponseUnwrap() throws IOException {
+        new HttpResponse(new HttpRequest(newClient()).request.connect()).unwrap();
+    }
+}