public function testChecksIfHasValue()
{
$this->assertFalse($this->coll->hasValue('value'));
$this->coll->add('test', 'value');
$this->assertEquals('test', $this->coll->hasValue('value'));
$this->coll->add('test2', 'value2');
$this->assertEquals('test', $this->coll->hasValue('value'));
$this->assertEquals('test2', $this->coll->hasValue('value2'));
$this->assertFalse($this->coll->hasValue('val'));
}