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diff --git a/lib/facebook-graph-sdk/tests/Authentication/AccessTokenTest.php b/lib/facebook-graph-sdk/tests/Authentication/AccessTokenTest.php
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+++ b/lib/facebook-graph-sdk/tests/Authentication/AccessTokenTest.php
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+<?php
+/**
+ * Copyright 2014 Facebook, Inc.
+ *
+ * You are hereby granted a non-exclusive, worldwide, royalty-free license to
+ * use, copy, modify, and distribute this software in source code or binary
+ * form for use in connection with the web services and APIs provided by
+ * Facebook.
+ *
+ * As with any software that integrates with the Facebook platform, your use
+ * of this software is subject to the Facebook Developer Principles and
+ * Policies [http://developers.facebook.com/policy/]. This copyright notice
+ * shall be included in all copies or substantial portions of the software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+namespace Facebook\Tests\Authentication;
+
+use Facebook\Authentication\AccessToken;
+
+class AccessTokenTest extends \PHPUnit_Framework_TestCase
+{
+
+    public function testAnAccessTokenCanBeReturnedAsAString()
+    {
+        $accessToken = new AccessToken('foo_token');
+
+        $this->assertEquals('foo_token', $accessToken->getValue());
+        $this->assertEquals('foo_token', (string)$accessToken);
+    }
+
+    public function testAnAppSecretProofWillBeProperlyGenerated()
+    {
+        $accessToken = new AccessToken('foo_token');
+
+        $appSecretProof = $accessToken->getAppSecretProof('shhhhh!is.my.secret');
+
+        $this->assertEquals('796ba0d8a6b339e476a7b166a9e8ac0a395f7de736dc37de5f2f4397f5854eb8', $appSecretProof);
+    }
+
+    public function testAnAppAccessTokenCanBeDetected()
+    {
+        $normalToken = new AccessToken('foo_token');
+        $isNormalToken = $normalToken->isAppAccessToken();
+
+        $this->assertFalse($isNormalToken, 'Normal access token not expected to look like an app access token.');
+
+        $appToken = new AccessToken('123|secret');
+        $isAppToken = $appToken->isAppAccessToken();
+
+        $this->assertTrue($isAppToken, 'App access token expected to look like an app access token.');
+    }
+
+    public function testShortLivedAccessTokensCanBeDetected()
+    {
+        $anHourAndAHalf = time() + (1.5 * 60);
+        $accessToken = new AccessToken('foo_token', $anHourAndAHalf);
+
+        $isLongLived = $accessToken->isLongLived();
+
+        $this->assertFalse($isLongLived, 'Expected access token to be short lived.');
+    }
+
+    public function testLongLivedAccessTokensCanBeDetected()
+    {
+        $accessToken = new AccessToken('foo_token', $this->aWeekFromNow());
+
+        $isLongLived = $accessToken->isLongLived();
+
+        $this->assertTrue($isLongLived, 'Expected access token to be long lived.');
+    }
+
+    public function testAnAppAccessTokenDoesNotExpire()
+    {
+        $appToken = new AccessToken('123|secret');
+        $hasExpired = $appToken->isExpired();
+
+        $this->assertFalse($hasExpired, 'App access token not expected to expire.');
+    }
+
+    public function testAnAccessTokenCanExpire()
+    {
+        $expireTime = time() - 100;
+        $appToken = new AccessToken('foo_token', $expireTime);
+        $hasExpired = $appToken->isExpired();
+
+        $this->assertTrue($hasExpired, 'Expected 100 second old access token to be expired.');
+    }
+
+    public function testAccessTokenCanBeSerialized()
+    {
+        $accessToken = new AccessToken('foo', time(), 'bar');
+
+        $newAccessToken = unserialize(serialize($accessToken));
+
+        $this->assertEquals((string)$accessToken, (string)$newAccessToken);
+        $this->assertEquals($accessToken->getExpiresAt(), $newAccessToken->getExpiresAt());
+    }
+
+    private function aWeekFromNow()
+    {
+        return time() + (60 * 60 * 24 * 7);//a week from now
+    }
+}