Omnipay\PayPal\RestGateway::getTokenExpires PHP Method

    public function getTokenExpires()
    {
        return $this->getParameter('tokenExpires');
    }

 public function testBearerToken()
 {
     $this->gateway->setToken('');
     $this->setMockHttpResponse('RestTokenSuccess.txt');
     $this->assertFalse($this->gateway->hasToken());
     $this->assertEquals('A015GQlKQ6uCRzLHSGRliANi59BHw6egNVKEWRnxvTwvLr0', $this->gateway->getToken());
     // triggers request
     $this->assertEquals(time() + 28800, $this->gateway->getTokenExpires());
     $this->assertTrue($this->gateway->hasToken());
 }