Add Drone CI

- Add drone test environment
- Add drone config
- apt phpunit
- Fix api.php
- Fix item.php
- Fix DBStructure
- Check if caching is possible during tests

src/Core/Cache/MemcacheCache.php

@@ -37,7 +37,7 @@ class MemcacheCache extends Cache implements IMemoryCache
 		$memcache_host = $config->get('system', 'memcache_host');
 		$memcache_port = $config->get('system', 'memcache_port');
 
-		if (!$this->memcache->connect($memcache_host, $memcache_port)) {
+		if (!@$this->memcache->connect($memcache_host, $memcache_port)) {
 			throw new Exception('Expected Memcache server at ' . $memcache_host . ':' . $memcache_port . ' isn\'t available');
 		}
 	}

src/Core/Cache/RedisCache.php

@@ -37,9 +37,9 @@ class RedisCache extends Cache implements IMemoryCache
 		$redis_pw   = $config->get('system', 'redis_password');
 		$redis_db   = $config->get('system', 'redis_db', 0);
 
-		if (isset($redis_port) && !$this->redis->connect($redis_host, $redis_port)) {
+		if (isset($redis_port) && !@$this->redis->connect($redis_host, $redis_port)) {
 			throw new Exception('Expected Redis server at ' . $redis_host . ':' . $redis_port . ' isn\'t available');
-		} elseif (!$this->redis->connect($redis_host)) {
+		} elseif (!@$this->redis->connect($redis_host)) {
 			throw new Exception('Expected Redis server at ' . $redis_host . ' isn\'t available');
 		}
 

src/Database/DBStructure.php

@@ -12,7 +12,7 @@ use Friendica\Core\L10n;
 use Friendica\Core\Logger;
 use Friendica\Util\DateTimeFormat;
 
-require_once 'include/dba.php';
+require_once __DIR__ . '/../../include/dba.php';
 
 /**
  * @brief This class contain functions for the database management

src/Database/Database.php

@@ -67,7 +67,7 @@ class Database
 	{
 		// Use environment variables for mysql if they are set beforehand
 		if (!empty($server['MYSQL_HOST'])
-		    && !empty($server['MYSQL_USERNAME'] || !empty($server['MYSQL_USER']))
+		    && (!empty($server['MYSQL_USERNAME'] || !empty($server['MYSQL_USER'])))
 		    && $server['MYSQL_PASSWORD'] !== false
 		    && !empty($server['MYSQL_DATABASE']))
 		{