test_ext_tabs_query.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Tabs create Test</title>

  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>

  <script type="text/javascript" src="head.js"></script>

  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>

</head>

<body>

<script type="text/javascript">

"use strict";

add_task(async function test_query_index() {

  const extension = ExtensionTestUtils.loadExtension({

    background: function() {

      browser.tabs.onCreated.addListener(async function({index, windowId, id}) {

        browser.test.assertThrows(

          () => browser.tabs.query({index: -1}),

          /-1 is too small \(must be at least 0\)/,

          "tab indices must be non-negative");

        let tabs = await browser.tabs.query({index, windowId});

        browser.test.assertEq(tabs.length, 1, `Got one tab at index ${index}`);

        browser.test.assertEq(tabs[0].id, id, "The tab is the right one");

        tabs = await browser.tabs.query({index: 1e5, windowId});

        browser.test.assertEq(tabs.length, 0, "There is no tab at this index");

        browser.test.notifyPass("tabs.query");

});

},

});

  await extension.startup();

  const win = window.open("http://example.com");

  await extension.awaitFinish("tabs.query");

  win.close();

  await extension.unload();

});

</script>

</body>

</html>