php guzzle mock

mockRequest.php

<?php
function mockRequest($method, $uri, $headers, $response)
{
    return function (RequestInterface $request, $options) use ($method, $uri, $headers, $response) {
        if ($method != $request->getMethod()) {
            throw new \LogicException("Invalid Mock: '$method'' expected");
        }

        $actual = $request->getUri();
        if ($uri != $request->getUri()) {
            throw new \LogicException("Invalid Mock: uri '$uri' expected, but '$actual' given");
        }

        foreach ($headers as $header => $expected) {
            if ($request->getHeaderLine($header) != $expected) {
                throw new \LogicException("Invalid Mock: header $header: $expected expected");
            }
        };

        return $response;
    };
}