getClientTester example

$response = new Response();
        $response->headers->setCookie(HttpFoundationCookie::create('foo', 'bar'));

        $this->getResponseTester($response)->assertResponseCookieValueSame('foo', 'bar');
        $this->expectException(AssertionFailedError::class);
        $this->expectExceptionMessage('has cookie "bar" and has cookie "bar" with value "bar".');
        $this->getResponseTester($response)->assertResponseCookieValueSame('bar', 'bar');
    }

    public function testAssertBrowserHasCookie()
    {
        $this->getClientTester()->assertBrowserHasCookie('foo', '/path');
        $this->expectException(AssertionFailedError::class);
        $this->expectExceptionMessage('Failed asserting that the Browser has cookie "bar".');
        $this->getClientTester()->assertBrowserHasCookie('bar');
    }

    public function testAssertBrowserNotHasCookie()
    {
        $this->getClientTester()->assertBrowserNotHasCookie('bar');
        $this->expectException(AssertionFailedError::class);
        $this->expectExceptionMessage('Failed asserting that the Browser does not have cookie "foo" with path "/path".');
        $this->getClientTester()->assertBrowserNotHasCookie('foo', '/path');
    }