test_emptyCopyMessages.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

var { MessageInjection } = ChromeUtils.importESModule(

  "resource://testing-common/mailnews/MessageInjection.sys.mjs"

);

const messageInjection = new MessageInjection({ mode: "local" });

add_task(async function rejectEmptyCopy() {

  const srcFolder = await messageInjection.makeEmptyFolder();

  const dstFolder = await messageInjection.makeEmptyFolder();

  Assert.throws(

    () =>

      dstFolder.copyMessages(srcFolder, [], false, null, null, false, false),

    ex => ex.result == Cr.NS_ERROR_INVALID_ARG,

    "Direct empty message copies should be rejected."

);

});