/**
* Test inserting a field after another in a set.
*/
public function testInsertAfterFieldToSet()
{
$fields = new FieldList();
/* 3 fields are added to the set */
$fields->push(new TextField('Country'));
$fields->push(new TextField('Email'));
$fields->push(new TextField('FirstName'));
/* We now have 3 fields in the set */
$this->assertEquals(3, $fields->Count());
/* A field called Title is inserted after the Country field */
$fields->insertAfter(new TextField('Title'), 'Country');
/* The field we just added actually exists in the set */
$this->assertNotNull($fields->dataFieldByName('Title'));
/* We now have 4 fields in the FieldList */
$this->assertEquals(4, $fields->Count());
/* The position of the Title field should be at number 2 */
$this->assertEquals('Title', $fields[1]->getName());
/* Test arguments are accepted in either order */
$fields->insertAfter('FirstName', new TextField('Surname'));
/* The field we just added actually exists in the set */
$this->assertNotNull($fields->dataFieldByName('Surname'));
/* We now have 5 fields in the set */
$this->assertEquals(5, $fields->Count());
/* The position of the Surname field is at number 5 */
$this->assertEquals('Surname', $fields[4]->getName());
}