fkooman\OAuth\Client\TokenRequestTest::testWithRefreshToken PHP Method

    public function testWithRefreshToken()
    {
        $client = new Client();
        $mock = new MockPlugin();
        $mock->addResponse(new Response(200, null, $this->tokenResponse[0]));
        $client->addSubscriber($mock);
        $history = new HistoryPlugin();
        $history->setLimit(5);
        $client->addSubscriber($history);
        $guzzle3Client = new Guzzle3Client($client);
        $tokenRequest = new TokenRequest($guzzle3Client, $this->clientConfig[0]);
        $tokenRequest->withRefreshToken('refresh_123_456');
        $lastRequest = $history->getLastRequest();
        $this->assertEquals('POST', $lastRequest->getMethod());
        $this->assertEquals('Basic Zm9vOmJhcg==', $lastRequest->getHeader('Authorization'));
        $this->assertEquals('refresh_token=refresh_123_456&grant_type=refresh_token', $lastRequest->getPostFields()->__toString());
        $this->assertEquals('application/x-www-form-urlencoded; charset=utf-8', $lastRequest->getHeader('Content-Type'));
    }