devtools/client/responsive.html/test/unit/test_change_display_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 display pixel ratio.

const { changeDisplayPixelRatio } =
  require("devtools/client/responsive.html/actions/display-pixel-ratio");
const NEW_PIXEL_RATIO = 5.5;

add_task(function* () {
  let store = Store();
  const { getState, dispatch } = store;

  equal(getState().displayPixelRatio, 0,
        "Defaults to 0 at startup");

  dispatch(changeDisplayPixelRatio(NEW_PIXEL_RATIO));
  equal(getState().displayPixelRatio, NEW_PIXEL_RATIO,
    `Display Pixel Ratio changed to ${NEW_PIXEL_RATIO}`);
});