GuzzleHttp\Test\Handler\MockHandlerTest::testInvokesOnFulfilled PHP Метод

    public function testInvokesOnFulfilled()
    {
        $res = new Response();
        $mock = new MockHandler([$res], function ($v) use(&$c) {
            $c = $v;
        });
        $request = new Request('GET', 'http://example.com');
        $mock($request, [])->wait();
        $this->assertSame($res, $c);
    }