Add tests. Closes #101

tests/Strategy/GreedyCacheStrategyTest.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace Kevinrob\GuzzleCache\Strategy;
+
+use GuzzleHttp\Client;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Promise\FulfilledPromise;
+use GuzzleHttp\Psr7\Request;
+use GuzzleHttp\Psr7\Response;
+use Kevinrob\GuzzleCache\CacheMiddleware;
+use Kevinrob\GuzzleCache\Storage\VolatileRuntimeStorage;
+use Psr\Http\Message\RequestInterface;
+
+class GreedyCacheStrategyTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var Client
+     */
+    protected $client;
+
+    public function setUp()
+    {
+        // Create default HandlerStack
+        $stack = HandlerStack::create(function (RequestInterface $request, array $options) {
+            return new FulfilledPromise((new Response()));
+        });
+
+        // Add this middleware to the top with `push`
+        $stack->push(new CacheMiddleware(
+            new GreedyCacheStrategy(new VolatileRuntimeStorage(), 2)
+        ), 'cache');
+
+        // Initialize the client with the handler option
+        $this->client = new Client(['handler' => $stack]);
+    }
+
+    public function testDefaultTtl()
+    {
+        $this->client->get('http://test.com/');
+
+        $response = $this->client->get('http://test.com/');
+        $this->assertEquals(CacheMiddleware::HEADER_CACHE_HIT, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
+
+        sleep(3);
+
+        $response = $this->client->get('http://test.com/');
+        $this->assertEquals(CacheMiddleware::HEADER_CACHE_MISS, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
+    }
+
+    public function testHeaderTtl()
+    {
+        /** @var Request $request */
+        $request = (new Request('GET', 'http://test.com/2'))
+            ->withHeader(GreedyCacheStrategy::HEADER_TTL, -2);
+        $this->client->send($request);
+
+        $response = $this->client->send($request);
+        $this->assertEquals(CacheMiddleware::HEADER_CACHE_MISS, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
+
+        /** @var Request $request */
+        $request = (new Request('GET', 'http://test.com/2'))
+            ->withHeader(GreedyCacheStrategy::HEADER_TTL, 5);
+
+        $this->client->send($request);
+
+        $response = $this->client->send($request);
+        $this->assertEquals(CacheMiddleware::HEADER_CACHE_HIT, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
+
+        sleep(6);
+
+        $response = $this->client->send($request);
+        $this->assertEquals(CacheMiddleware::HEADER_CACHE_MISS, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
+    }
+}