public function testLeftJoinPrefix()
{
/* expect and actual */
$expectArray = ['category_alias' => 'home', 'article_alias' => 'welcome'];
$actualArray = Db::forTablePrefix('articles')->tableAlias('a')->leftJoinPrefix('categories', 'a.category = c.id', 'c')->select('c.alias', 'category_alias')->select('a.alias', 'article_alias')->where('a.alias', 'welcome')->findArray();
/* compare */
$this->assertEquals($expectArray, $actualArray[0]);
}