Add SSL connection test for cURL easy handle

ext/tests/swow_curl/easy.phpt

@@ -0,0 +1,36 @@
+--TEST--
+swow_curl: easy (SSL connection)
+--SKIPIF--
+<?php
+require __DIR__ . '/../include/skipif.php';
+skip_if_extension_not_exist('curl');
+skip_if(PHP_SAPI !== 'cli', 'only for cli');
+skip_if(!Swow\Extension::isBuiltWith('curl'), 'extension must be built with libcurl');
+skip_if(stripos(@file_get_contents('https://www.qq.com/'), 'tencent') === false, 'Unable to access qq.com');
+skip_if(stripos(@file_get_contents('https://www.baidu.com/'), 'baidu') === false, 'Unable to access baidu.com');
+?>
+--FILE--
+<?php
+require __DIR__ . '/../include/bootstrap.php';
+
+use Swow\Http\Status;
+
+$ch1 = curl_init();
+$ch2 = curl_init();
+
+curl_setopt($ch1, CURLOPT_URL, 'https://www.qq.com/');
+curl_setopt($ch1, CURLOPT_HEADER, 0);
+curl_setopt($ch1, CURLOPT_RETURNTRANSFER, 1);
+curl_setopt($ch2, CURLOPT_URL, 'https://www.baidu.com/');
+curl_setopt($ch2, CURLOPT_HEADER, 0);
+curl_setopt($ch2, CURLOPT_RETURNTRANSFER, 1);
+
+$response1 = curl_exec($ch1);
+Assert::true(stripos($response1, 'tencent') !== false);
+$response2 = curl_exec($ch2);
+Assert::true(stripos($response2, 'baidu') !== false);
+
+echo "Done\n";
+?>
+--EXPECT--
+Done