Braintree\Gateway::oauth PHP Method

    public function oauth()
    {
        return new OAuthGateway($this);
    }

 public function testComputeSignature()
 {
     $gateway = new Braintree\Gateway(array('clientId' => 'client_id$development$integration_client_id', 'clientSecret' => 'client_secret$development$integration_client_secret'));
     $urlToSign = 'http://localhost:3000/oauth/connect?business%5Bname%5D=We+Like+Spaces&client_id=client_id%24development%24integration_client_id';
     $signature = $gateway->oauth()->computeSignature($urlToSign);
     $this->assertEquals("a36bcf10dd982e2e47e0d6a2cb930aea47ade73f954b7d59c58dae6167894d41", $signature);
 }