Create a list selection field, give it a value, update and delete the field.
function testProfileSelectionField() {
$this
->drupalLogin($this->admin_user);
$edit = array(
'options' => implode("\n", range(1, 10)),
);
$field = $this
->createProfileField('selection', 'simpletest', $edit);
$this
->setProfileField($field, rand(1, 10));
$edit = array(
'name' => $field['form_name'],
'title' => $this
->randomName(),
'category' => $field['category'],
'explanation' => $this
->randomName(),
);
$field = $this
->updateProfileField($field['fid'], $field['type'], $edit);
$this
->deleteProfileField($field);
}