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diff --git a/comm/mailnews/search/test/unit/test_searchBoolean.js b/comm/mailnews/search/test/unit/test_searchBoolean.js
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+++ b/comm/mailnews/search/test/unit/test_searchBoolean.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/. */
+
+/*
+ * Demonstrates and tests the use of grouped boolean expressions in search terms
+ */
+
+var { MailServices } = ChromeUtils.import(
+  "resource:///modules/MailServices.jsm"
+);
+
+var gSearchSession = Cc[
+  "@mozilla.org/messenger/searchSession;1"
+].createInstance(Ci.nsIMsgSearchSession);
+
+var gHdr; // the message header for the one mailbox message
+
+var Tests = [
+  {
+    A: false,
+    B: false,
+    C: false,
+    D: false,
+    matches: false,
+  },
+  {
+    A: false,
+    B: false,
+    C: false,
+    D: true,
+    matches: false,
+  },
+  {
+    A: false,
+    B: false,
+    C: true,
+    D: false,
+    matches: false,
+  },
+  {
+    A: false,
+    B: false,
+    C: true,
+    D: true,
+    matches: false,
+  },
+  {
+    A: false,
+    B: true,
+    C: false,
+    D: false,
+    matches: false,
+  },
+  {
+    A: false,
+    B: true,
+    C: false,
+    D: true,
+    matches: true,
+  },
+  {
+    A: false,
+    B: true,
+    C: true,
+    D: false,
+    matches: true,
+  },
+  {
+    A: false,
+    B: true,
+    C: true,
+    D: true,
+    matches: true,
+  },
+  {
+    A: true,
+    B: false,
+    C: false,
+    D: false,
+    matches: false,
+  },
+  {
+    A: true,
+    B: false,
+    C: false,
+    D: true,
+    matches: true,
+  },
+  {
+    A: true,
+    B: false,
+    C: true,
+    D: false,
+    matches: true,
+  },
+  {
+    A: true,
+    B: false,
+    C: true,
+    D: true,
+    matches: true,
+  },
+  {
+    A: true,
+    B: true,
+    C: false,
+    D: false,
+    matches: false,
+  },
+  {
+    A: true,
+    B: true,
+    C: false,
+    D: true,
+    matches: true,
+  },
+  {
+    A: true,
+    B: true,
+    C: true,
+    D: false,
+    matches: true,
+  },
+  {
+    A: true,
+    B: true,
+    C: true,
+    D: true,
+    matches: true,
+  },
+];
+
+var gHitCount = 0;
+var searchListener = {
+  onSearchHit(dbHdr, folder) {
+    gHitCount++;
+  },
+  onSearchDone(status) {
+    testSearch();
+  },
+  onNewSearch() {
+    gHitCount = 0;
+  },
+};
+
+function run_test() {
+  localAccountUtils.loadLocalMailAccount();
+
+  /*
+   * I want to create and test a search term that uses this expression:
+   *   (A || B ) && (C || D)
+   *
+   * The logical expressions A, B, C, and D will be represented by header
+   * string properties with values of T (true) or F (false).
+   *
+   */
+
+  // add a search term HdrProperty (some string) Is "T", with grouping
+  function addSearchTerm(aHdrProperty, aBeginGrouping, aEndGrouping, aBoolAnd) {
+    let searchTerm = gSearchSession.createTerm();
+    searchTerm.attrib = Ci.nsMsgSearchAttrib.HdrProperty;
+
+    let value = searchTerm.value;
+    // This is tricky - value.attrib must be set before actual values
+    value.attrib = Ci.nsMsgSearchAttrib.HdrProperty;
+    value.str = "T";
+    searchTerm.value = value;
+
+    searchTerm.op = Ci.nsMsgSearchOp.Is;
+    searchTerm.booleanAnd = aBoolAnd;
+    searchTerm.beginsGrouping = aBeginGrouping;
+    searchTerm.endsGrouping = aEndGrouping;
+    searchTerm.hdrProperty = aHdrProperty;
+    gSearchSession.appendTerm(searchTerm);
+  }
+
+  gSearchSession.addScopeTerm(
+    Ci.nsMsgSearchScope.offlineMail,
+    localAccountUtils.inboxFolder
+  );
+  gSearchSession.registerListener(searchListener);
+  // I tried using capital "A" but something makes it lower case internally, so it failed
+  addSearchTerm("a", true, false, true); // "(A"
+  addSearchTerm("b", false, true, false); // " || B)"
+  addSearchTerm("c", true, false, true); // " && (C"
+  addSearchTerm("d", false, true, false); // " || D)"
+
+  var copyListener = {
+    OnStartCopy() {},
+    OnProgress(aProgress, aProgressMax) {},
+    SetMessageKey(aKey) {
+      gHdr = localAccountUtils.inboxFolder.GetMessageHeader(aKey);
+    },
+    SetMessageId(aMessageId) {},
+    OnStopCopy(aStatus) {
+      testSearch();
+    },
+  };
+
+  // Get a message into the local filestore. function testSearch() continues
+  // the testing after the copy.
+  var bugmail1 = do_get_file("../../../data/bugmail1");
+  do_test_pending();
+  MailServices.copy.copyFileMessage(
+    bugmail1,
+    localAccountUtils.inboxFolder,
+    null,
+    false,
+    0,
+    "",
+    copyListener,
+    null
+  );
+}
+
+var gTest = null;
+// process each test from queue, calls itself upon completion of each search
+function testSearch() {
+  // tests the previous search
+  if (gTest) {
+    Assert.equal(gHitCount, gTest.matches ? 1 : 0);
+  }
+  gTest = Tests.shift();
+  if (gTest) {
+    gHdr.setStringProperty("a", gTest.A ? "T" : "F");
+    gHdr.setStringProperty("b", gTest.B ? "T" : "F");
+    gHdr.setStringProperty("c", gTest.C ? "T" : "F");
+    gHdr.setStringProperty("d", gTest.D ? "T" : "F");
+    try {
+      gSearchSession.search(null);
+    } catch (e) {
+      dump(e);
+    }
+  } else {
+    gSearchSession.unregisterListener(searchListener);
+    do_test_finished();
+  }
+}