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diff --git a/comm/mailnews/imap/test/unit/test_localToImapFilter.js b/comm/mailnews/imap/test/unit/test_localToImapFilter.js
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+++ b/comm/mailnews/imap/test/unit/test_localToImapFilter.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/. */
+
+/*
+ * This file tests copies of multiple messages using filters
+ * from incoming POP3, with filter actions copying and moving
+ * messages to IMAP folders. This test is adapted from
+ * test_imapFolderCopy.js
+ *
+ * Original author: Kent James <kent@caspia.com>
+ */
+
+/**
+ * NOTE:
+ * There's a problem with this test in chaos mode (mach xpcshell-test --verify)
+ * with the filter applying.
+ * It's either a problem with the POP3Pump implementation (testing infrastructure failure)
+ * or a problem with the copy filter.
+ */
+
+/* import-globals-from ../../../test/resources/POP3pump.js */
+load("../../../resources/POP3pump.js");
+
+var { MailServices } = ChromeUtils.import(
+  "resource:///modules/MailServices.jsm"
+);
+var { PromiseTestUtils } = ChromeUtils.import(
+  "resource://testing-common/mailnews/PromiseTestUtils.jsm"
+);
+
+var gEmptyLocal1, gEmptyLocal2;
+var gFiles = ["../../../data/bugmail1", "../../../data/draft1"];
+
+add_setup(async function () {
+  setupIMAPPump();
+  let emptyFolder1Listener = PromiseTestUtils.promiseFolderAdded("empty 1");
+  gEmptyLocal1 = localAccountUtils.rootFolder.createLocalSubfolder("empty 1");
+  await emptyFolder1Listener;
+  let emptyFolder2Listener = PromiseTestUtils.promiseFolderAdded("empty 2");
+  gEmptyLocal2 = localAccountUtils.rootFolder.createLocalSubfolder("empty 2");
+  await emptyFolder2Listener;
+
+  // These hacks are required because we've created the inbox before
+  // running initial folder discovery, and adding the folder bails
+  // out before we set it as verified online, so we bail out, and
+  // then remove the INBOX folder since it's not verified.
+  IMAPPump.inbox.hierarchyDelimiter = "/";
+  IMAPPump.inbox.verifiedAsOnlineFolder = true;
+});
+
+add_task(async function copyFolder1() {
+  let copyListener = new PromiseTestUtils.PromiseCopyListener();
+  MailServices.copy.copyFolder(
+    gEmptyLocal1,
+    IMAPPump.inbox,
+    false,
+    copyListener,
+    null
+  );
+  await copyListener.promise;
+});
+
+add_task(async function updateTrash() {
+  let trashFolder = IMAPPump.incomingServer.rootFolder
+    .getChildNamed("Trash")
+    .QueryInterface(Ci.nsIMsgImapMailFolder);
+  let listener = new PromiseTestUtils.PromiseUrlListener();
+  // hack to force uid validity to get initialized for trash.
+  trashFolder.updateFolderWithListener(null, listener);
+  await listener.promise;
+});
+
+add_task(async function copyFolder2() {
+  let copyListener = new PromiseTestUtils.PromiseCopyListener();
+  MailServices.copy.copyFolder(
+    gEmptyLocal2,
+    IMAPPump.inbox,
+    false,
+    copyListener,
+    null
+  );
+  await copyListener.promise;
+});
+
+add_task(async function getLocalMessages() {
+  // setup copy then move mail filters on the inbox
+  let filterList = gPOP3Pump.fakeServer.getFilterList(null);
+  let filter = filterList.createFilter("copyThenMoveAll");
+  let searchTerm = filter.createTerm();
+  searchTerm.matchAll = true;
+  filter.appendTerm(searchTerm);
+  let copyAction = filter.createAction();
+  copyAction.type = Ci.nsMsgFilterAction.CopyToFolder;
+  copyAction.targetFolderUri = IMAPPump.inbox.getChildNamed("empty 1").URI;
+  filter.appendAction(copyAction);
+  let moveAction = filter.createAction();
+  moveAction.type = Ci.nsMsgFilterAction.MoveToFolder;
+  moveAction.targetFolderUri = IMAPPump.inbox.getChildNamed("empty 2").URI;
+  filter.appendAction(moveAction);
+  filter.enabled = true;
+  filterList.insertFilterAt(0, filter);
+  let resolveOnDone;
+  let promiseOnDone = new Promise(resolve => {
+    resolveOnDone = resolve;
+  });
+  gPOP3Pump.files = gFiles;
+  gPOP3Pump.onDone = resolveOnDone;
+  gPOP3Pump.run();
+
+  await promiseOnDone;
+});
+
+add_task(async function test_update1_copyFilter() {
+  let listener = new PromiseTestUtils.PromiseUrlListener();
+  let folder1 = IMAPPump.inbox
+    .getChildNamed("empty 1")
+    .QueryInterface(Ci.nsIMsgImapMailFolder);
+  folder1.updateFolderWithListener(null, listener);
+  await listener.promise;
+  Assert.ok(folder1 !== null);
+  Assert.equal(
+    folderCount(folder1),
+    2,
+    "the two filtered messages should be in empty 1"
+  );
+});
+
+add_task(async function test_update2_moveFilter() {
+  let listener = new PromiseTestUtils.PromiseUrlListener();
+  let folder2 = IMAPPump.inbox
+    .getChildNamed("empty 2")
+    .QueryInterface(Ci.nsIMsgImapMailFolder);
+  folder2.updateFolderWithListener(null, listener);
+  await listener.promise;
+  Assert.ok(folder2 !== null);
+  Assert.equal(
+    folderCount(folder2),
+    2,
+    "the two filtered messages should be in empty 2"
+  );
+});
+
+add_task(async function verifyLocalFolder() {
+  // the local inbox folder should now be empty, since the second
+  // operation was a move
+  Assert.equal(folderCount(localAccountUtils.inboxFolder), 0);
+});
+
+add_task(function endTest() {
+  gEmptyLocal1 = null;
+  gEmptyLocal2 = null;
+  gPOP3Pump = null;
+  teardownIMAPPump();
+});
+
+function folderCount(folder) {
+  return [...folder.msgDatabase.enumerateMessages()].length;
+}