function testUpdateCMSFieldsOnSiteTree() {
$pageOrigLang = $this->objFromFixture('Page', 'home');
// first test with default language
$fields = $pageOrigLang->getCMSFields();
$this->assertType(
'TextField',
$fields->dataFieldByName('Title'),
'Translatable doesnt modify fields if called in default language (e.g. "non-translation mode")'
);
$this->assertNull(
$fields->dataFieldByName('Title_original'),
'Translatable doesnt modify fields if called in default language (e.g. "non-translation mode")'
);
// then in "translation mode"
$pageTranslated = Translatable::get_one_by_lang('Page',"fr", "ID = $pageOrigLang->ID");
$fields = $pageTranslated->getCMSFields();
$this->assertType(
'TextField',
$fields->dataFieldByName('Title'),
'Translatable leaves original formfield intact in "translation mode"'
);
$readonlyField = $fields->dataFieldByName('Title')->performReadonlyTransformation();
$this->assertType(
$readonlyField->class,
$fields->dataFieldByName('Title_original'),
'Translatable adds the original value as a ReadonlyField in "translation mode"'
);
}
