Tweaked tests and fixed pluck bug

Author: jenssegers

src/Jenssegers/Mongodb/Builder.php

@@ -359,6 +359,26 @@ public function decrement($column, $amount = 1, array $extra = array())
         return $this->increment($column, -1 * $amount, $extra);
     }
 
+    /**
+     * Pluck a single column from the database.
+     *
+     * @param  string  $column
+     * @return mixed
+     */
+    public function pluck($column)
+    {
+        $result = (array) $this->first(array($column));
+
+        // MongoDB returns the _id field even if you did not ask for it, so we need to
+        // remove this from the result.
+        if (array_key_exists('_id', $result))
+        {
+            unset($result['_id']);
+        }
+
+        return count($result) > 0 ? reset($result) : null;
+    }
+
     /**
      * Delete a record from the database.
      *

tests/CacheTest.php

@@ -5,9 +5,14 @@
 
 class CacheTest extends PHPUnit_Framework_TestCase {
 
+	protected $cache;
+
 	public function setUp()
 	{
-		// test data
+		# clear cache
+		global $app;
+		$this->cache = $app['cache'];
+
 		User::create(array('name' => 'John Doe', 'age' => 35, 'title' => 'admin'));
 		User::create(array('name' => 'Jane Doe', 'age' => 33, 'title' => 'admin'));
 		User::create(array('name' => 'Harry Hoe', 'age' => 13, 'title' => 'user'));
@@ -16,15 +21,11 @@ public function setUp()
 	public function tearDown()
 	{
 		User::truncate();
+		$this->cache->forget('db.users');
 	}
 
 	public function testCache()
 	{
-		# get from cache driver
-		global $app;
-		$cache = $app['cache'];
-		$cache->forget('db.users');
-
 		# auto generate cache key
 		$users = DB::collection('users')->where('age', '>', 10)->remember(10)->get();
 		$this->assertEquals(3, count($users));
@@ -36,7 +37,7 @@ public function testCache()
 		$users = User::where('age', '>', 10)->remember(10, 'db.users')->get();
 		$this->assertEquals(3, count($users));
 
-		$users = $cache->get('db.users');
+		$users = $this->cache->get('db.users');
 		$this->assertEquals(3, count($users));
 	}