palemoon27/toolkit/devtools/server/tests/browser/browser_stylesheets_getTextEmpty.js

/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Test that StyleSheetActor.getText handles empty text correctly.

const {StyleSheetsFront} = require("devtools/server/actors/stylesheets");

const CONTENT = "<style>body { background-color: #f0c; }</style>";
const TEST_URI = "data:text/html;charset=utf-8," + encodeURIComponent(CONTENT);

add_task(function*() {
  yield addTab(TEST_URI);

  info("Initialising the debugger server and client.");
  initDebuggerServer();
  let client = new DebuggerClient(DebuggerServer.connectPipe());
  let form = yield connectDebuggerClient(client);

  info("Attaching to the active tab.");
  yield new Promise(resolve => {
    client.attachTab(form.actor, resolve);
  });

  let front = StyleSheetsFront(client, form);
  ok(front, "The StyleSheetsFront was created.");

  let sheets = yield front.getStyleSheets();
  ok(sheets, "getStyleSheets() succeeded");
  is(sheets.length, 1,
     "getStyleSheets() returned the correct number of sheets");

  let sheet = sheets[0];
  yield sheet.update("", false);
  let longStr = yield sheet.getText();
  let source = yield longStr.string();
  is(source, "", "text is empty");

  yield closeDebuggerClient(client);
});