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<!DOCTYPE HTML>
<html>
<head>
  <title>Test for content script teardown</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="/tests/SimpleTest/SpawnTask.js"></script>
  <script type="text/javascript" src="/tests/SimpleTest/ExtensionTestUtils.js"></script>
  <script type="text/javascript" src="head.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
</head>
<body>

<script>
"use strict";

add_task(function* test_contentscript_reload_and_unload() {
  function contentScript() {
    browser.test.sendMessage("contentscript-run");
  }
  function background() {
    let removedTabs = 0;
    browser.tabs.onRemoved.addListener(() => {
      browser.test.assertEq(1, ++removedTabs,
          "Expected only one tab to be removed during the test");
      browser.test.sendMessage("tab-closed");
    });
  }

  let extensionData = {
    background,
    manifest: {
      content_scripts: [{
        "matches": ["http://mochi.test/*/file_sample.html"],
        "js": ["contentscript.js"],
      }],
    },

    files: {
      "contentscript.js": contentScript,
    },
  };

  let extension = ExtensionTestUtils.loadExtension(extensionData);
  yield extension.startup();

  let chromeScript = SpecialPowers.loadChromeScript(
      SimpleTest.getTestFileURL("file_teardown_test.js"));
  yield chromeScript.promiseOneMessage("chromescript-startup");
  function* getContextEvents() {
    chromeScript.sendAsyncMessage("get-context-events");
    let contextEvents = yield chromeScript.promiseOneMessage("context-events");
    return contextEvents.filter(event => event.extensionId == extension.id);
  }

  let win = window.open("file_sample.html");
  yield extension.awaitMessage("contentscript-run");
  let tabUrl = win.location.href;

  let contextEvents = yield* getContextEvents();
  is(contextEvents.length, 1,
      "ExtensionContext state change after loading a content script");
  is(contextEvents[0].eventType, "load",
      "Create ExtensionContext for content script");
  is(contextEvents[0].url, tabUrl, "ExtensionContext URL = page");

  let promiseReload = extension.awaitMessage("contentscript-run");
  win.location.reload();
  yield promiseReload;
  contextEvents = yield* getContextEvents();
  is(contextEvents.length, 2,
      "ExtensionContext state changes after reloading a content script");
  is(contextEvents[0].eventType, "unload", "Unload old ExtensionContext");
  is(contextEvents[0].url, tabUrl, "ExtensionContext URL = page");
  is(contextEvents[1].eventType, "load",
      "Create new ExtensionContext for content script");
  is(contextEvents[1].url, tabUrl, "ExtensionContext URL = page");

  let tabClosePromise = extension.awaitMessage("tab-closed");
  win.close();
  yield tabClosePromise;

  contextEvents = yield* getContextEvents();
  is(contextEvents.length, 1,
      "ExtensionContext state change after unloading a content script");
  is(contextEvents[0].eventType, "unload",
      "Unload ExtensionContext after closing the tab with the content script");
  is(contextEvents[0].url, tabUrl, "ExtensionContext URL = page");

  chromeScript.sendAsyncMessage("cleanup");
  chromeScript.destroy();
  yield extension.unload();
});
</script>

</body>
</html>