public function testFieldIsRequired()
{
//get the validator
$requiredFields = new RequiredFields($fieldNames = array('Title', 'Content', 'Image', 'AnotherField'));
foreach ($fieldNames as $field) {
$this->assertTrue($requiredFields->fieldIsRequired($field), sprintf("Failed to find '%s' field in required list", $field));
}
//add a new field
$requiredFields->addRequiredField('ExtraField1');
//check the new field is required
$this->assertTrue($requiredFields->fieldIsRequired('ExtraField1'), "Failed to find 'ExtraField1' field in required list after adding it to the list");
//check a non-existant field returns false
$this->assertFalse($requiredFields->fieldIsRequired('DoesntExist'), "Unexpectedly returned true for a non-existant field");
}