test_change_pixel_ratio.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Test changing the viewport pixel ratio.

const {

  addViewport,

  changePixelRatio,

} = require("resource://devtools/client/responsive/actions/viewports.js");

const NEW_PIXEL_RATIO = 5.5;

add_task(async function () {

  const store = Store();

  const { getState, dispatch } = store;

  dispatch(addViewport());

  dispatch(changePixelRatio(0, NEW_PIXEL_RATIO));

  const viewport = getState().viewports[0];

  equal(

    viewport.pixelRatio,

    NEW_PIXEL_RATIO,

    `Viewport's pixel ratio changed to ${NEW_PIXEL_RATIO}`

);

});