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   1  <?php
   2  namespace GuzzleHttp\Ring\Client;
   3  
   4  use GuzzleHttp\Ring\Core;
   5  use GuzzleHttp\Ring\Future\CompletedFutureArray;
   6  use GuzzleHttp\Ring\Future\FutureArrayInterface;
   7  
   8  /**
   9   * Ring handler that returns a canned response or evaluated function result.
  10   */
  11  class MockHandler
  12  {
  13      /** @var callable|array|FutureArrayInterface */
  14      private $result;
  15  
  16      /**
  17       * Provide an array or future to always return the same value. Provide a
  18       * callable that accepts a request object and returns an array or future
  19       * to dynamically create a response.
  20       *
  21       * @param array|FutureArrayInterface|callable $result Mock return value.
  22       */
  23      public function __construct($result)
  24      {
  25          $this->result = $result;
  26      }
  27  
  28      public function __invoke(array $request)
  29      {
  30          Core::doSleep($request);
  31          $response = is_callable($this->result)
  32              ? call_user_func($this->result, $request)
  33              : $this->result;
  34  
  35          if (is_array($response)) {
  36              $response = new CompletedFutureArray($response + [
  37                  'status'        => null,
  38                  'body'          => null,
  39                  'headers'       => [],
  40                  'reason'        => null,
  41                  'effective_url' => null,
  42              ]);
  43          } elseif (!$response instanceof FutureArrayInterface) {
  44              throw new \InvalidArgumentException(
  45                  'Response must be an array or FutureArrayInterface. Found '
  46                  . Core::describeType($request)
  47              );
  48          }
  49  
  50          return $response;
  51      }
  52  }