route-with-callbacks.md

Route with callbacks

public function testRoute(): void
{
    $builder = new CallbackRouteBuilder(
        Psr17FactoryDiscovery::findResponseFactory(),
        Psr17FactoryDiscovery::findStreamFactory(),
    );

    $route = $builder->withMethod('GET')
        ->withPath('/country')
        ->withStringResponse(
            $this->checkCountry('AU'),
            '{"id":"+43","code":"AU","name":"Austria"}',
        )
        ->withStringResponse(
            $this->checkCountry('IT'),
            '{"id":"+39","code":"IT","name":"Italy"}',
        )
        ->build();

    // Request #1
    $response = $route->getHandler()(new Request('GET', '/country?code=AU'));
    assert($response instanceof ResponseInterface);

    $this->assertEquals(200, $response->getStatusCode());

    $data = json_decode($response->getBody()->getContents(), true);
    $this->assertEquals('Austria', $data['name']);

    // Request #2
    $response = $route->getHandler()(new Request('GET', '/country?code=IT'));
    assert($response instanceof ResponseInterface);

    $this->assertEquals(200, $response->getStatusCode());

    $data = json_decode($response->getBody()->getContents(), true);
    $this->assertEquals('Italy', $data['name']);

    // Request #3 - Response not found
    $this->expectException(ResponseNotFound::class);
    $route->getHandler()(new Request('GET', '/country'));
}

/** @return callable(RequestInterface $request):bool */
private function checkCountry(string $countryCode): callable
{
    return static function (RequestInterface $request) use ($countryCode): bool {
        parse_str($request->getUri()->getQuery(), $requestParameters);

        return ($requestParameters['code'] ?? '') === $countryCode;
    };
}