middleware_mirror/tests/MiddlewareTest.php

<?php
/**
 * Created by PhpStorm.
 * User: Noa
 * Date: 09/10/2017
 * Time: 15:50
 */

namespace Retailmenot\Lab\Test;


use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Psr7\Response;
use PHPUnit\Framework\TestCase;
use Faker\Factory as Faker;
use Psr\Http\Message\RequestInterface;

class Test extends TestCase
{

    /**
     * -- Data provider --
     * Define request heading to a success
     */
    public function correctRequest() {

        $requests = array();
        $faker = Faker::create();

        $request = new Request('GET', '/something');
        $request = $request->withHeader('X-RMN-Lab', 'rmn_request_'.$faker->randomNumber(5));

        $requests[] = [$request];

        return $requests;
    }

    /**
     * -- Data provider --
     * Define request heading to a failure
     */
    public function wrongRequestMissingHeader() {

        $requests = array();

        $request = new Request('GET', '/something');

        $requests[] = [$request];

        return $requests;
    }

    /**
     * -- Data provider --
     * Define request heading to a success
     */
    public function wrongRequestWrongHeaderName() {

        $requests = array();
        $faker = Faker::create();

        $request = new Request('GET', '/something');
        $request = $request->withHeader('X-RMN-Lab2', 'rmn_request_'.$faker->randomNumber(5));

        $requests[] = [$request];

        return $requests;
    }

    /**
     * -- Data provider --
     * Define request heading to a success
     */
    public function wrongRequestWrongHeaderValue() {

        $requests = array();
        $faker = Faker::create();

        $request = new Request('GET', '/something');
        $request = $request->withHeader('X-RMN-Lab', 'rmn_request2_'.$faker->randomNumber(5));

        $requests[] = [$request];

        return $requests;
    }

    /**
     * What : Input a request in the middleware
     * Expected : wait for a 200 response code and an header X-RMN-Lab with the right value
     * @param Request $request
     * @dataProvider correctRequest
     */
    public function testMiddlewareByFunctionSuccess($request) {

        $response = new Response();
        $response = addHeaderMiddleware($request, $response);

        $rmnHeader = $request->getHeader('X-RMN-Lab');
        $responseRmnHeader = $response->getHeader('X-RMN-Lab-Response');

        if (!count($responseRmnHeader)) {

            $this->fail("Missing X-RMN-Lab-Response in Response object");
        }

        preg_match('#rmn_request_(\d+)#', $rmnHeader[0], $matchesRequest);
        preg_match('#rmn_response_(\d+)#', $responseRmnHeader[0], $matchesResponse);

        if (!count($matchesResponse)) {

            $this->fail("Wrong pattern in X-RMN-Lab-Response value: rmn_response_(\d+)");
        }

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals($matchesRequest[1], $matchesResponse[1], "The response header ID doesn't match to request header ID");
    }

    /**
     * What : Input a request in the middleware without header
     * Expected : wait for a 400 response code and a JSON error body
     * @param Request $request
     * @dataProvider wrongRequestMissingHeader
     */
    public function testMiddlewareByFunctionFailureOnMissingHeader($request) {

        $response = new Response();
        $response = addHeaderMiddleware($request, $response);

        ob_start();
        echo $response->getBody();
        $body = ob_get_clean();

        $data = json_decode($body, true);

        if(is_null($data)) {

            $this->fail("Body isn't a correct JSON serialized string");
        }

        $contentType = $response->getHeader('Content-Type');

        if (!count($contentType)) {

            $this->fail("Missing Content-Type header");
        }

        $this->assertEquals("application/json", $contentType[0]);

        $this->assertEquals(400, $response->getStatusCode());
        $this->assertArrayHasKey('message', $data, "Message body must contain the 'message' key");
        $this->assertArrayHasKey('code', $data, "Message body must contain the 'code' key");
        $this->assertEquals('Missing "X-RMN-Lab" header', $data['message']);
        $this->assertEquals(1, $data['code']);
    }

    /**
     * What : Input a request in the middleware with a wrong header name
     * Expected : wait for a 400 response code and a JSON error body
     * @param Request $request
     * @dataProvider wrongRequestWrongHeaderName
     */
    public function testMiddlewareByFunctionFailureOnWrongHeaderName($request) {

        $response = new Response();
        $response = addHeaderMiddleware($request, $response);

        ob_start();
        echo $response->getBody();
        $body = ob_get_clean();

        $data = json_decode($body, true);

        if(is_null($data)) {

            $this->fail("Body isn't a correct JSON serialized string");
        }

        $contentType = $response->getHeader('Content-Type');

        if (!count($contentType)) {

            $this->fail("Missing Content-Type header");
        }

        $this->assertEquals("application/json", $contentType[0]);

        $this->assertEquals(400, $response->getStatusCode());
        $this->assertArrayHasKey('message', $data, "Message body must contain the 'message' key");
        $this->assertArrayHasKey('code', $data, "Message body must contain the 'code' key");
        $this->assertEquals('Missing "X-RMN-Lab" header', $data['message']);
        $this->assertEquals(1, $data['code']);
    }

    /**
     * What : Input a request in the middleware with a wrong header value
     * Expected : wait for a 400 response code and a JSON error body
     * @param Request $request
     * @dataProvider wrongRequestWrongHeaderValue
     */
    public function testMiddlewareByFunctionFailureOnWrongHeaderValue($request) {

        $response = new Response();
        $response = addHeaderMiddleware($request, $response);

        ob_start();
        echo $response->getBody();
        $body = ob_get_clean();

        $data = json_decode($body, true);

        if(is_null($data)) {

            $this->fail("Body isn't a correct JSON serialized string");
        }

        $rmnHeader = $request->getHeader('X-RMN-Lab')[0];
        $contentType = $response->getHeader('Content-Type');

        if (!count($contentType)) {

            $this->fail("Missing Content-Type header");
        }

        $this->assertEquals("application/json", $contentType[0]);

        $this->assertEquals(400, $response->getStatusCode());
        $this->assertArrayHasKey('message', $data, "Message body must contain the 'message' key");
        $this->assertArrayHasKey('code', $data, "Message body must contain the 'code' key");
        $this->assertEquals('Invalid "X-RMN-Lab" header: '.$rmnHeader, $data['message']);
        $this->assertEquals(2, $data['code']);
    }

    /**
     * What : Input a request in the middleware
     * Expected : wait for a 200 response code and an header X-RMN-Lab with the right value
     * @param Request $request
     * @dataProvider correctRequest
     */
    public function testMiddlewareByFunctionChainedSuccess($request) {

        $middleware1 = function($request, $response, $next=null) {

            return addHeaderMiddleware($request, $response, $next);
        };

        $middleware2 = function($request, $response, $next=null) {

            return dummyMiddleware($request, $response, $next);
        };

        $middleware3 = function($request, $response, $next=null) {

            return dummyMiddleware2($request, $response, $next);
        };


        $response = new Response();

        $response = $middleware1($request, $response, function($request, $response) use($middleware2, $middleware3) {
            return $middleware2($request, $response, function($request, $response) use($middleware3) {
                return $middleware3($request, $response, function ($request, $response) {
                    return $response;
                });
            });
        });

        $middlewareHeader1 = $response->getHeader('X-RMN-DummyMiddleware');
        $middlewareHeader2 = $response->getHeader('X-RMN-DummyMiddleware2');

        $rmnHeader = $request->getHeader('X-RMN-Lab');
        $responseRmnHeader = $response->getHeader('X-RMN-Lab-Response');

        if (!count($responseRmnHeader)) {

            $this->fail("Missing X-RMN-Lab-Response in Response object");
        }

        if (!count($middlewareHeader1)) {

            $this->fail("Missing X-RMN-DummyMiddleware in Response object");
        }

        if (!count($middlewareHeader2)) {

            $this->fail("Missing X-RMN-DummyMiddleware2 in Response object");
        }

        preg_match('#rmn_request_(\d+)#', $rmnHeader[0], $matchesRequest);
        preg_match('#rmn_response_(\d+)#', $responseRmnHeader[0], $matchesResponse);

        if (!count($matchesResponse)) {

            $this->fail("Wrong pattern in X-RMN-Lab-Response value: rmn_response_(\d+)");
        }

        $this->assertEquals(200, $response->getStatusCode());
        $this->assertEquals($matchesRequest[1], $matchesResponse[1], "The response header ID doesn't match to request header ID");
        $this->assertEquals('I was here : dummy middleware', $middlewareHeader1[0]);
        $this->assertEquals('I was here : dummy middleware 2', $middlewareHeader2[0]);
    }
}