gecko-dev/devtools/client/shadereditor/test/browser_se_first-run.js

/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

/**
 * Tests if the shader editor shows the appropriate UI when opened.
 */

async function ifWebGLSupported() {
  let { target, panel } = await initShaderEditor(SIMPLE_CANVAS_URL);
  let { gFront, $ } = panel.panelWin;

  is($("#reload-notice").hidden, false,
    "The 'reload this page' notice should initially be visible.");
  is($("#waiting-notice").hidden, true,
    "The 'waiting for a WebGL context' notice should initially be hidden.");
  is($("#content").hidden, true,
    "The tool's content should initially be hidden.");

  let navigating = once(target, "will-navigate");
  let linked = once(gFront, "program-linked");
  reload(target);

  await navigating;

  is($("#reload-notice").hidden, true,
    "The 'reload this page' notice should be hidden when navigating.");
  is($("#waiting-notice").hidden, false,
    "The 'waiting for a WebGL context' notice should be visible when navigating.");
  is($("#content").hidden, true,
    "The tool's content should still be hidden.");

  await linked;

  is($("#reload-notice").hidden, true,
    "The 'reload this page' notice should be hidden after linking.");
  is($("#waiting-notice").hidden, true,
    "The 'waiting for a WebGL context' notice should be hidden after linking.");
  is($("#content").hidden, false,
    "The tool's content should not be hidden anymore.");

  await teardown(panel);
  finish();
}