diff --git a/.travis.yml b/.travis.yml
index 543c9e9..082f60c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,4 +5,6 @@ php:
 - 7.0
 - 7.1
 - nightly
-before_script: composer install
\ No newline at end of file
+before_script: composer install
+services:
+  - redis-server
diff --git a/composer.json b/composer.json
index 5210821..3b6e4b1 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,8 @@
     "php": ">=5.5"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8.13"
+    "phpunit/phpunit": "^4.8.13",
+    "predis/predis": "1.1.*"
   },
   "autoload": {
     "files": [
diff --git a/src/cache.php b/src/cache.php
index 90d644b..03e9df6 100644
--- a/src/cache.php
+++ b/src/cache.php
@@ -5,13 +5,18 @@ class Cache {
   private static $redis;
 
   public static function redis($config=false) {
-    if(!isset(self::$redis)) {
+    if(empty(self::$redis)) {
       if($config) {
-        self::$redis = new \Predis\Client(Config::$redis);
+        self::$redis = new \Predis\Client($config);
       } else {
         self::$redis = new \Predis\Client('tcp://127.0.0.1:6379');
       }
     }
+    return self::$redis;
+  }
+
+  public static function reset() {
+    self::$redis = null;
   }
 
   public static function set($key, $value, $exp=600) {
@@ -23,13 +28,13 @@ class Cache {
     }
   }
 
-  public static function get($key) {
+  public static function get($key, $default=null) {
     self::redis();
     $data = self::$redis->get($key);
     if($data) {
       return json_decode($data);
     } else {
-      return null;
+      return $default;
     }
   }
 
diff --git a/src/utils.php b/src/utils.php
index 8b52147..ce4c525 100644
--- a/src/utils.php
+++ b/src/utils.php
@@ -1,18 +1,25 @@
 <?php
 namespace p3k;
 
+use DOMDocument, IMagick, Exception;
+use Config, ORM;
+
 function redis() {
-  static $client = false;
-  if(!$client)
-    $client = new Predis\Client(Config::$redis);
+  static $client;
+  if(empty($client))
+    $client = new \Predis\Client(class_exists('Config') ? Config::$redis : 'tcp://127.0.0.1:6379');
   return $client;
 }
 
 function bs()
 {
   static $pheanstalk;
-  if(!isset($pheanstalk))
-    $pheanstalk = new Pheanstalk\Pheanstalk(Config::$beanstalkServer, Config::$beanstalkPort);
+  if(empty($pheanstalk)) {
+    if(class_exists('Config'))
+      $pheanstalk = new \Pheanstalk\Pheanstalk(Config::$beanstalkServer, Config::$beanstalkPort);
+    else
+      $pheanstalk = new \Pheanstalk\Pheanstalk('127.0.0.1', 11300);
+  }
   return $pheanstalk;
 }
 
@@ -65,15 +72,15 @@ function str_ends_with($haystack, $needle) {
 function session_setup($create=false, $lifetime=2592000) {
   if($create || isset($_COOKIE[session_name()])) {
     session_set_cookie_params($lifetime);
-    session_start();
+    @session_start();
   }
 }
 
-function session($key) {
-  if(array_key_exists($key, $_SESSION))
+function session($key, $default=null) {
+  if(isset($_SESSION) && array_key_exists($key, $_SESSION))
     return $_SESSION[$key];
   else
-    return null;
+    return $default;
 }
 
 function flash($key) {
@@ -86,7 +93,7 @@ function flash($key) {
 
 function http_header_case($str) {
   $str = str_replace('-', ' ', $str);
-  $str = ucwords($str);
+  $str = ucwords(strtolower($str));
   $str = str_replace(' ', '-', $str);
   return $str;
 }
diff --git a/tests/CacheTest.php b/tests/CacheTest.php
new file mode 100644
index 0000000..cdc4a71
--- /dev/null
+++ b/tests/CacheTest.php
@@ -0,0 +1,85 @@
+<?php
+class CacheTest extends PHPUnit_Framework_TestCase {
+
+  public function testCreateFromConfig() {
+    p3k\Cache::redis('tcp://127.0.0.1:6379');
+    p3k\Cache::set('foo', 'bar');
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    p3k\Cache::reset();
+  }
+
+  public function testAutoCreate() {
+    p3k\Cache::set('foo', 'bar');
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    p3k\Cache::reset();
+  }
+
+  public function testSet() {
+    p3k\Cache::set('foo', 'bar', 0);
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    $redis = p3k\Cache::redis();
+    $this->assertEquals(-1, $redis->ttl('foo'));
+  }
+
+  public function testSetEx() {
+    p3k\Cache::set('foo', 'bar', 600);
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    $redis = p3k\Cache::redis();
+    $this->assertGreaterThan(500, $redis->ttl('foo'));
+  }
+
+  public function testGetExpired() {
+    p3k\Cache::set('foo', 'bar', 1);
+    sleep(1);
+    $this->assertEquals('default', p3k\Cache::get('foo', 'default'));
+  }
+
+  public function testDelete() {
+    p3k\Cache::set('foo', 'bar', 600);
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    p3k\Cache::delete('foo');
+    $this->assertEquals('default', p3k\Cache::get('foo', 'default'));
+  }
+
+  public function testExpire() {
+    p3k\Cache::set('foo', 'bar', 600);
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    p3k\Cache::expire('foo');
+    $this->assertEquals('default', p3k\Cache::get('foo', 'default'));
+
+    p3k\Cache::set('foo', 'bar', 600);
+    $this->assertEquals('bar', p3k\Cache::get('foo'));
+    p3k\Cache::expire('foo', 1);
+    sleep(1);
+    $this->assertEquals('default', p3k\Cache::get('foo', 'default'));
+  }
+
+  public function testIncr() {
+    p3k\Cache::delete('test1');
+    p3k\Cache::incr('test1');
+    $this->assertEquals(1, p3k\Cache::get('test1'));
+
+    p3k\Cache::set('test2', 10);
+    p3k\Cache::incr('test2');
+    $this->assertEquals(11, p3k\Cache::get('test2'));
+
+    p3k\Cache::set('test3', 10);
+    p3k\Cache::incr('test3', 4);
+    $this->assertEquals(14, p3k\Cache::get('test3'));
+  }
+
+  public function testDecr() {
+    p3k\Cache::delete('test4');
+    p3k\Cache::decr('test4');
+    $this->assertEquals(-1, p3k\Cache::get('test4'));
+
+    p3k\Cache::set('test5', 10);
+    p3k\Cache::decr('test5');
+    $this->assertEquals(9, p3k\Cache::get('test5'));
+
+    p3k\Cache::set('test6', 10);
+    p3k\Cache::decr('test6', 4);
+    $this->assertEquals(6, p3k\Cache::get('test6'));
+  }
+
+}
diff --git a/tests/UtilsTest.php b/tests/UtilsTest.php
new file mode 100644
index 0000000..e6ebf87
--- /dev/null
+++ b/tests/UtilsTest.php
@@ -0,0 +1,119 @@
+<?php
+class UtilsTest extends PHPUnit_Framework_TestCase {
+
+  public function testRandomString() {
+    $str1 = p3k\random_string(20);
+    $this->assertEquals(20, strlen($str1));
+    $str2 = p3k\random_string(20);
+    $this->assertEquals(20, strlen($str2));
+    $this->assertNotEquals($str1, $str2);
+  }
+
+  public function testEndsWith() {
+    $this->assertFalse(p3k\str_ends_with('abcdefg', ''));
+    $this->assertFalse(p3k\str_ends_with('', 'abcdefg'));
+    $this->assertTrue(p3k\str_ends_with('abcdefg', 'efg'));
+    $this->assertTrue(p3k\str_ends_with('abcdefg', 'abcdefg'));
+    $this->assertTrue(p3k\str_ends_with('abcdefg', 'g'));
+    $this->assertFalse(p3k\str_ends_with('abcdefg', 'abc'));
+  }
+
+  public function testSessionSetupNoCreate() {
+    // no session already, so this should not create one
+    p3k\session_setup();
+    $this->assertFalse(isset($_SESSION));
+  }
+
+  public function testSessionSetupCreateFromCookie() {
+    // there is a session cookie, so this should initialize the session
+    $_COOKIE[session_name()] = '12345';
+    p3k\session_setup();
+    $this->assertTrue(isset($_SESSION));
+  }
+
+  public function testSessionAccess() {
+    $_SESSION = [];
+    $this->assertNull(p3k\session('foo'));
+    $_SESSION = [];
+    $this->assertEquals('default', p3k\session('foo', 'default'));
+    $_SESSION = ['foo'=>'bar'];
+    $this->assertEquals('bar', p3k\session('foo'));
+  }
+
+  public function testFlash() {
+    $_SESSION = [];
+    $this->assertNull(p3k\flash('foo'));
+    $_SESSION = ['foo'=>'bar'];
+    $this->assertEquals('bar', p3k\flash('foo'));
+    $this->assertNull(p3k\flash('foo'));
+  }
+
+  public function testE() {
+    $html = p3k\e('<b>test</b>');
+    $this->assertEquals('&lt;b&gt;test&lt;/b&gt;', $html);
+  }
+
+  public function testK() {
+    $this->assertEquals('b', p3k\k(['a'=>'b'], 'a'));
+    $this->assertEquals('default', p3k\k(['a'=>'b'], 'z', 'default'));
+    $obj = new StdClass;
+    $obj->a = 'b';
+    $this->assertEquals('b', p3k\k($obj, 'a'));
+    $this->assertEquals('default', p3k\k($obj, 'z', 'default'));
+
+    $keys = ['a','b','c'];
+    $values = ['a'=>true, 'b'=>true, 'c'=>true];
+    $this->assertTrue(p3k\k($values, $keys));
+
+    $keys = ['a','b','c'];
+    $values = ['a'=>true, 'c'=>true];
+    $this->assertFalse(p3k\k($values, $keys));
+  }
+
+  public function testHTTPHeaderCase() {
+    $name = p3k\http_header_case('header-name');
+    $this->assertEquals('Header-Name', $name);
+    $name = p3k\http_header_case('HEADER-NAME');
+    $this->assertEquals('Header-Name', $name);
+    $name = p3k\http_header_case('hEaDeR-nAmE');
+    $this->assertEquals('Header-Name', $name);
+    $name = p3k\http_header_case('host');
+    $this->assertEquals('Host', $name);
+    $name = p3k\http_header_case('x-header-name');
+    $this->assertEquals('X-Header-Name', $name);
+  }
+
+  public function testHTMLToDomDocument() {
+    $doc = p3k\html_to_dom_document('<html><head><title>Title</title></head><body>Hello World</body></html>');
+    $this->assertEquals('DOMDocument', get_class($doc));
+    $this->assertEmpty(libxml_get_errors());
+    $doc = p3k\html_to_dom_document("\0this is not HTML");
+    $this->assertEquals('DOMDocument', get_class($doc));
+    $this->assertEmpty(libxml_get_errors());
+  }
+
+  public function testXMLToDomDocument() {
+    $doc = p3k\xml_to_dom_document('<html><head><title>Title</title></head><body>Hello World</body></html>');
+    $this->assertEquals('DOMDocument', get_class($doc));
+    $this->assertEmpty(libxml_get_errors());
+    $doc = p3k\xml_to_dom_document('<html><title>Title</title></head><body>Hello World</html>');
+    $this->assertEquals('DOMDocument', get_class($doc));
+    $this->assertEmpty(libxml_get_errors());
+    $doc = p3k\xml_to_dom_document("\0this is not XML");
+    $this->assertEquals('DOMDocument', get_class($doc));
+    $this->assertEmpty(libxml_get_errors());
+  }
+
+  public function testBase60() {
+    $this->assertEquals('BBBB', p3k\b10to60(p3k\b60to10('BBBB')));
+    $this->assertEquals('ABCD_efg', p3k\b10to60(p3k\b60to10('ABCD_efg')));
+    $this->assertEquals('Z111000', p3k\b10to60(p3k\b60to10('ZIl1O0O')));
+    $this->assertEquals('0', p3k\b10to60(p3k\b60to10(',<.')));
+  }
+
+  public function testCreatesRedis() {
+    p3k\redis();
+    $this->assertEquals('Predis\Client', get_class(p3k\redis()));
+  }
+
+}