diff --git a/lib/Doctrine/Common/Collections/Collection.php b/lib/Doctrine/Common/Collections/Collection.php
index 20cc48ca6..1882b4d87 100644
--- a/lib/Doctrine/Common/Collections/Collection.php
+++ b/lib/Doctrine/Common/Collections/Collection.php
@@ -31,7 +31,7 @@ use \ArrayIterator;
  * A Collection is a thin wrapper around a php array. Think of it as an OO version
  * of a plain array.
  *
- * @author robo
+ * @author Roman S. Borschel
  * @since 2.0
  */
 class Collection implements Countable, IteratorAggregate, ArrayAccess
@@ -45,8 +45,9 @@ class Collection implements Countable, IteratorAggregate, ArrayAccess
     protected $_elements = array();
 
     /**
+     * Constructor accepts an array of $elements
      *
-     * @param <type> $elements
+     * @param array $elements
      */
     public function __construct(array $elements = array())
     {
@@ -210,23 +211,13 @@ class Collection implements Countable, IteratorAggregate, ArrayAccess
      * @param Closure $p The predicate.
      * @return boolean TRUE if the predicate is TRUE for at least one element, FALSE otherwise.
      */
-    public function exists(Closure $p) {
+    public function exists(Closure $p)
+    {
         foreach ($this->_elements as $key => $element)
             if ($p($key, $element)) return true;
         return false;
     }
 
-    /**
-     * TODO
-     *
-     * @param unknown_type $otherColl
-     * @todo Impl
-     */
-    public function containsAll($otherColl)
-    {
-        throw new DoctrineException("Not yet implemented.");
-    }
-
     /**
      * Searches for a given element and, if found, returns the corresponding key/index
      * of that element. The comparison of two elements is strict, that means not
@@ -313,16 +304,6 @@ class Collection implements Countable, IteratorAggregate, ArrayAccess
         return true;
     }
 
-    /**
-     * Adds all entities of the other collection to this collection.
-     *
-     * @param unknown_type $otherCollection
-     * @todo Impl
-     */
-    public function addAll($otherCollection)
-    {
-    }
-
     /**
      * Checks whether the collection is empty.
      * Note: This is preferrable over count() == 0.
@@ -332,7 +313,7 @@ class Collection implements Countable, IteratorAggregate, ArrayAccess
     public function isEmpty()
     {
         // Note: Little "trick". Empty arrays evaluate to FALSE. No need to count().
-        return ! (bool)$this->_elements;
+        return ! (bool) $this->_elements;
     }
 
     /**
@@ -375,10 +356,13 @@ class Collection implements Countable, IteratorAggregate, ArrayAccess
      * @param Closure $p The predicate.
      * @return boolean TRUE, if the predicate yields TRUE for all elements, FALSE otherwise.
      */
-    public function forall(Closure $p)
+    public function forAll(Closure $p)
     {
-        foreach ($this->_elements as $key => $element)
-            if ( ! $p($key, $element)) return false;
+        foreach ($this->_elements as $key => $element) {
+            if ( ! $p($key, $element)) {
+                return false;
+            }
+        }
         return true;
     }
 
@@ -419,5 +403,4 @@ class Collection implements Countable, IteratorAggregate, ArrayAccess
     {
         $this->_elements = array();
     }
-}
-
+}
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/Common/Collections/CollectionTest.php b/tests/Doctrine/Tests/Common/Collections/CollectionTest.php
index 5858264e3..54eb7f988 100644
--- a/tests/Doctrine/Tests/Common/Collections/CollectionTest.php
+++ b/tests/Doctrine/Tests/Common/Collections/CollectionTest.php
@@ -12,14 +12,17 @@ require_once __DIR__ . '/../../TestInit.php';
  * @author robo
  * @since 2.0
  */
-class CollectionTest extends \Doctrine\Tests\DoctrineTestCase {
+class CollectionTest extends \Doctrine\Tests\DoctrineTestCase
+{
     private $_coll;
 
-    protected function setUp() {
+    protected function setUp()
+    {
         $this->_coll = new \Doctrine\Common\Collections\Collection;
     }
 
-    public function testExists() {
+    public function testExists()
+    {
         $this->_coll->add("one");
         $this->_coll->add("two");
         $exists = $this->_coll->exists(function($key, $element) { return $element == "one"; });
@@ -28,19 +31,128 @@ class CollectionTest extends \Doctrine\Tests\DoctrineTestCase {
         $this->assertFalse($exists);
     }
 
-    public function testMap() {
+    public function testMap()
+    {
         $this->_coll->add(1);
         $this->_coll->add(2);
         $res = $this->_coll->map(function ($e) { return $e * 2; });
         $this->assertEquals(array(2, 4), $res->unwrap());
     }
 
-    public function testFilter() {
+    public function testFilter()
+    {
         $this->_coll->add(1);
         $this->_coll->add("foo");
         $this->_coll->add(3);
         $res = $this->_coll->filter(function ($e) { return is_numeric($e); });
         $this->assertEquals(array(0 => 1, 2 => 3), $res->unwrap());
     }
-}
 
+    public function testFirstAndLast()
+    {
+        $this->_coll->add('one');
+        $this->_coll->add('two');
+
+        $this->assertEquals($this->_coll->first(), 'one');
+        $this->assertEquals($this->_coll->last(), 'two');
+    }
+
+    public function testArrayAccess()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+
+        $this->assertEquals($this->_coll[0], 'one');
+        $this->assertEquals($this->_coll[1], 'two');
+
+        unset($this->_coll[0]);
+        $this->assertEquals($this->_coll->count(), 1);
+    }
+
+    public function testContainsKey()
+    {
+        $this->_coll[5] = 'five';
+        $this->assertEquals($this->_coll->containsKey(5), true);
+    }
+
+    public function testContains()
+    {
+        $this->_coll[0] = 'test';
+        $this->assertEquals($this->_coll->contains('test'), true);
+    }
+
+    public function testSearch()
+    {
+        $this->_coll[0] = 'test';
+        $this->assertEquals($this->_coll->search('test'), 0);
+    }
+
+    public function testGet()
+    {
+        $this->_coll[0] = 'test';
+        $this->assertEquals($this->_coll->get(0), 'test');
+    }
+
+    public function testGetKeys()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->assertEquals($this->_coll->getKeys(), array(0, 1));
+    }
+
+    public function testGetElements()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->assertEquals($this->_coll->getElements(), array('one', 'two'));
+    }
+
+    public function testCount()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->assertEquals($this->_coll->count(), 2);
+        $this->assertEquals(count($this->_coll), 2);
+    }
+
+    public function testForAll()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->assertEquals($this->_coll->forAll(function($key, $element) { return is_string($element); }), true);
+        $this->assertEquals($this->_coll->forAll(function($key, $element) { return is_array($element); }), false);
+    }
+
+    public function testPartition()
+    {
+        $this->_coll[] = true;
+        $this->_coll[] = false;
+        $partition = $this->_coll->partition(function($key, $element) { return $element == true; });
+        $this->assertEquals($partition[0][0], true);
+        $this->assertEquals($partition[1][0], false);
+    }
+
+    public function testClear()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->_coll->clear();
+        $this->assertEquals($this->_coll->isEmpty(), true);
+    }
+
+    public function testRemove()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->_coll->remove(0);
+        $this->assertEquals($this->_coll->contains('one'), false);
+    }
+
+    public function testRemoveElement()
+    {
+        $this->_coll[] = 'one';
+        $this->_coll[] = 'two';
+        $this->_coll->removeElement('two');
+        $this->assertEquals($this->_coll->contains('two'), false);
+    }
+}
\ No newline at end of file