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tests/Middleware/RetryMiddlewareTest.php

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+<?php
+declare(strict_types=1);
+
+namespace Ely\Mojang\Test\Middleware;
+
+use Ely\Mojang\Middleware\RetryMiddleware;
+use GuzzleHttp\Exception\ConnectException;
+use GuzzleHttp\Psr7\Request;
+use GuzzleHttp\Psr7\Response;
+use PHPUnit\Framework\TestCase;
+
+class RetryMiddlewareTest extends TestCase {
+
+    public function testShouldRetry() {
+        $r = new Request('GET', 'http://localhost');
+        $this->assertFalse(RetryMiddleware::shouldRetry(0, $r, new Response(200), null), 'not retry on success response');
+        $this->assertFalse(RetryMiddleware::shouldRetry(0, $r, new Response(403), null), 'not retry on client error');
+        $this->assertTrue(RetryMiddleware::shouldRetry(0, $r, null, new ConnectException('', $r)), 'retry when network error happens');
+        $this->assertTrue(RetryMiddleware::shouldRetry(0, $r, new Response(503), null), 'retry when 50x error 1 time');
+        $this->assertTrue(RetryMiddleware::shouldRetry(1, $r, new Response(503), null), 'retry when 50x error 2 time');
+        $this->assertFalse(RetryMiddleware::shouldRetry(2, $r, new Response(503), null), 'don\'t retry when 50x error 3 time');
+    }
+
+}