public function testGetHeader()
{
$column = new Column($this->table, 'test');
$header = $column->getHeader();
$this->assertTag(['tag' => 'a', 'attributes' => ['class' => 'grid-view-sort-asc', 'href' => '/?sort=test&sort_dir=asc&page=0'], 'content' => 'Test'], $header);
}
