Index: Src/GoogleApis.Auth.Tests/OAuth2/BearerTokenTests.cs
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+/*
+Copyright 2013 Google Inc
+
+Licensed under the Apache License, Version 2.0(the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+
+using NUnit.Framework;
+
+namespace Google.Apis.Auth.OAuth2
+{
+    /// <summary>Tests for <see cref="Google.Apis.Auth.OAuth2.BearerToken"/>.</summary>
+    [TestFixture]
+    public class BearerTokenTests
+    {
+        [Test]
+        public void AuthorizationHeaderAccessMethod_Intercept()
+        {
+            var request = new HttpRequestMessage();
+            new BearerToken.AuthorizationHeaderAccessMethod().Intercept(request, "abc");
+            Assert.That(request.Headers.Authorization.ToString(), Is.EqualTo("Bearer abc"));
+        }
+
+        [Test]
+        public void AuthorizationHeaderAccessMethod_InterceptOverride()
+        {
+            var request = new HttpRequestMessage();
+            request.Headers.Authorization = new AuthenticationHeaderValue("a", "1");
+            new BearerToken.AuthorizationHeaderAccessMethod().Intercept(request, "abc");
+            Assert.That(request.Headers.Authorization.ToString(), Is.EqualTo("Bearer abc"));
+        }
+
+        [Test]
+        public void AuthorizationHeaderAccessMethod_GetAccessToken()
+        {
+            var request = new HttpRequestMessage();
+            request.Headers.Authorization = new AuthenticationHeaderValue("a", "1");
+            var accessToken = new BearerToken.AuthorizationHeaderAccessMethod().GetAccessToken(request);
+            Assert.IsNullOrEmpty(accessToken);
+
+            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "abc");
+            accessToken = new BearerToken.AuthorizationHeaderAccessMethod().GetAccessToken(request);
+            Assert.That(accessToken, Is.EqualTo("abc"));
+        }
+
+        [Test]
+        public void QueryParameterAccessMethod_Intercept()
+        {
+            var request = new HttpRequestMessage(HttpMethod.Get, new Uri("https://sample.com/path"));
+            new BearerToken.QueryParameterAccessMethod().Intercept(request, "abc");
+            Assert.That(request.RequestUri, Is.EqualTo(new Uri("https://sample.com/path?access_token=abc")));
+        }
+
+        [Test]
+        public void QueryParameterAccessMethod_Intercept_WithQueryParameters()
+        {
+            var request = new HttpRequestMessage(HttpMethod.Get, new Uri("https://sample.com/path?a=1"));
+            new BearerToken.QueryParameterAccessMethod().Intercept(request, "abc");
+            Assert.That(request.RequestUri, Is.EqualTo(new Uri("https://sample.com/path?a=1&access_token=abc")));
+        }
+
+        [Test]
+        public void QueryParameterAccessMethod_GetAccessToken()
+        {
+            // No query parameter at all.
+            var request = new HttpRequestMessage(HttpMethod.Get, new Uri("https://sample.com"));
+            var accessToken = new BearerToken.QueryParameterAccessMethod().GetAccessToken(request);
+            Assert.IsNullOrEmpty(accessToken);
+
+            // Different query parameter.
+            request = new HttpRequestMessage(HttpMethod.Get, new Uri("https://sample.com?a=1"));
+            accessToken = new BearerToken.QueryParameterAccessMethod().GetAccessToken(request);
+            Assert.IsNullOrEmpty(accessToken);
+
+            // One query parameter and it's access_token.
+            request = new HttpRequestMessage(HttpMethod.Get, new Uri("https://sample.com?a=1&access_token=abc"));
+            accessToken = new BearerToken.QueryParameterAccessMethod().GetAccessToken(request);
+            Assert.That(accessToken, Is.EqualTo("abc"));
+
+            // 2 query parameters and one of them is access_token.
+            request = new HttpRequestMessage(HttpMethod.Get, new Uri("https://sample.com?access_token=abc"));
+            accessToken = new BearerToken.QueryParameterAccessMethod().GetAccessToken(request);
+            Assert.That(accessToken, Is.EqualTo("abc"));
+        }
+    }
+}