jsonRequest example

public function testXmlHttpRequest()
    {
        $client = $this->getBrowser();
        $client->xmlHttpRequest('GET', 'http://example.com/', [], [], [], null, true);
        $this->assertSame('XMLHttpRequest', $client->getRequest()->getServer()['HTTP_X_REQUESTED_WITH']);
        $this->assertFalse($client->getServerParameter('HTTP_X_REQUESTED_WITH', false));
    }

    public function testJsonRequest()
    {
        $client = $this->getBrowser();
        $client->jsonRequest('GET', 'http://example.com/', ['param' => 1], [], true);
        $this->assertSame('application/json', $client->getRequest()->getServer()['CONTENT_TYPE']);
        $this->assertSame('application/json', $client->getRequest()->getServer()['HTTP_ACCEPT']);
        $this->assertFalse($client->getServerParameter('CONTENT_TYPE', false));
        $this->assertFalse($client->getServerParameter('HTTP_ACCEPT', false));
        $this->assertSame('{"param":1}', $client->getRequest()->getContent());
    }

    public function testGetRequestWithIpAsHttpHost()
    {
        $client = $this->getBrowser();
        $client->request('GET', 'https://example.com/foo', [], [], ['HTTP_HOST' => '127.0.0.1']);