How to locate an ion-option-button in a list using Protractor

ionic-v1
1

I don’t seem to get the ion-item to make the ion-option-button visible so that protractor can click the button.

This is what I tried using protractor --elementExplorer:

browser.actions().dragAndDrop(
(element.all(by.repeater('item in items')).get(0)), { x: 500, y: 0 })
.perform();

But it only highlights the item but does not show the ion-option-button. Also tried:

browser.actions().mouseDown().mouseMove(
(element.all(by.repeater('item in items')).get(0)), { x: 500, y: 0 })
.perform();

It also does not work. Any clues?