diff --git a/tests/unit/framework/helpers/ArrayHelperTest.php b/tests/unit/framework/helpers/ArrayHelperTest.php
index 5ace571..92a3971 100644
--- a/tests/unit/framework/helpers/ArrayHelperTest.php
+++ b/tests/unit/framework/helpers/ArrayHelperTest.php
@@ -24,6 +24,17 @@ class Post2 extends Object
 	}
 }
 
+class Post3 extends Object
+{
+	public $id = 33;
+	public $subObject;
+
+	public function init()
+	{
+		$this->subObject = new Post2();
+	}
+}
+
 class ArrayHelperTest extends TestCase
 {
 	public function testToArray()
@@ -57,6 +68,16 @@ class ArrayHelperTest extends TestCase
 					return strlen($post->content);
 				}
 		))));
+
+		$object = new Post3();
+		$this->assertEquals(get_object_vars($object), ArrayHelper::toArray($object, array(), false));
+		$this->assertEquals(array(
+			'id' => 33,
+			'subObject' => array(
+				'id' => 123,
+				'content' => 'test',
+			),
+		), ArrayHelper::toArray($object));
 	}
 
 	public function testRemove()
@@ -66,6 +87,9 @@ class ArrayHelperTest extends TestCase
 
 		$this->assertEquals($name, 'b');
 		$this->assertEquals($array, array('age' => 3));
+
+		$default = ArrayHelper::remove($array, 'nonExisting', 'defaultValue');
+		$this->assertEquals('defaultValue', $default);
 	}
 
 
@@ -150,4 +174,123 @@ class ArrayHelperTest extends TestCase
 		$this->assertEquals(array('name' => 'a', 'age' => 1), $array[1]);
 		$this->assertEquals(array('name' => 'b', 'age' => 3), $array[2]);
 	}
+
+	public function testMerge()
+	{
+		$a = array(
+			'name' => 'Yii',
+			'version' => '1.0',
+			'options' => array(
+				'namespace' => false,
+				'unittest' => false,
+			),
+			'features' => array(
+				'mvc',
+			),
+		);
+		$b = array(
+			'version' => '1.1',
+			'options' => array(
+				'unittest' => true,
+			),
+			'features' => array(
+				'gii',
+			),
+		);
+		$c = array(
+			'version' => '2.0',
+			'options' => array(
+				'namespace' => true,
+			),
+			'features' => array(
+				'debug',
+			),
+		);
+
+		$result = ArrayHelper::merge($a, $b, $c);
+		$expected = array(
+			'name' => 'Yii',
+			'version' => '2.0',
+			'options' => array(
+				'namespace' => true,
+				'unittest' => true,
+			),
+			'features' => array(
+				'mvc',
+				'gii',
+				'debug',
+			),
+		);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	public function testIndex()
+	{
+		$array = array(
+			array('id' => '123', 'data' => 'abc'),
+			array('id' => '345', 'data' => 'def'),
+		);
+		$result = ArrayHelper::index($array, 'id');
+		$this->assertEquals(array(
+			'123' => array('id' => '123', 'data' => 'abc'),
+			'345' => array('id' => '345', 'data' => 'def'),
+		), $result);
+
+		$result = ArrayHelper::index($array, function ($element) {
+			return $element['data'];
+		});
+		$this->assertEquals(array(
+			'abc' => array('id' => '123', 'data' => 'abc'),
+			'def' => array('id' => '345', 'data' => 'def'),
+		), $result);
+	}
+
+	public function testGetColumn()
+	{
+		$array = array(
+			'a' => array('id' => '123', 'data' => 'abc'),
+			'b' => array('id' => '345', 'data' => 'def'),
+		);
+		$result = ArrayHelper::getColumn($array, 'id');
+		$this->assertEquals(array('a' => '123', 'b' => '345'), $result);
+		$result = ArrayHelper::getColumn($array, 'id', false);
+		$this->assertEquals(array('123', '345'), $result);
+
+		$result = ArrayHelper::getColumn($array, function ($element) {
+			return $element['data'];
+		});
+		$this->assertEquals(array('a' => 'abc', 'b' => 'def'), $result);
+		$result = ArrayHelper::getColumn($array, function ($element) {
+			return $element['data'];
+		}, false);
+		$this->assertEquals(array('abc', 'def'), $result);
+	}
+
+	public function testMap()
+	{
+		$array = array(
+			array('id' => '123', 'name' => 'aaa', 'class' => 'x'),
+			array('id' => '124', 'name' => 'bbb', 'class' => 'x'),
+			array('id' => '345', 'name' => 'ccc', 'class' => 'y'),
+		);
+
+		$result = ArrayHelper::map($array, 'id', 'name');
+		$this->assertEquals(array(
+			'123' => 'aaa',
+			'124' => 'bbb',
+			'345' => 'ccc',
+		), $result);
+
+		$result = ArrayHelper::map($array, 'id', 'name', 'class');
+		$this->assertEquals(array(
+			'x' => array(
+				'123' => 'aaa',
+				'124' => 'bbb',
+			),
+			'y' => array(
+				'345' => 'ccc',
+			),
+		), $result);
+	}
 }
diff --git a/tests/unit/framework/helpers/InflectorTest.php b/tests/unit/framework/helpers/InflectorTest.php
index df5b424..732c10d 100644
--- a/tests/unit/framework/helpers/InflectorTest.php
+++ b/tests/unit/framework/helpers/InflectorTest.php
@@ -131,5 +131,11 @@ class InflectorTest extends TestCase
 	public function testOrdinalize()
 	{
 		$this->assertEquals('21st', Inflector::ordinalize('21'));
+		$this->assertEquals('22nd', Inflector::ordinalize('22'));
+		$this->assertEquals('23rd', Inflector::ordinalize('23'));
+		$this->assertEquals('24th', Inflector::ordinalize('24'));
+		$this->assertEquals('25th', Inflector::ordinalize('25'));
+		$this->assertEquals('111th', Inflector::ordinalize('111'));
+		$this->assertEquals('113th', Inflector::ordinalize('113'));
 	}
 }