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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
// Test adding viewports to the page.
const {
addViewport,
add_task(async function () {
const store = Store();
const { getState, dispatch } = store;
equal(getState().viewports.length, 0, "Defaults to no viewpots at startup");
dispatch(addViewport());
equal(getState().viewports.length, 1, "One viewport total");
// For the moment, there can be at most one viewport.
dispatch(addViewport());
equal(getState().viewports.length, 1, "One viewport total, again");
});