/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

/**
 * Make sure that the debugger is updated with the correct sources when moving
 * back and forward in the tab.
 */

const TAB_URL_1 = EXAMPLE_URL + "doc_script-switching-01.html";
const TAB_URL_2 = EXAMPLE_URL + "doc_recursion-stack.html";

var gTab, gDebuggee, gPanel, gDebugger;
var gSources;

const test = Task.async(function* () {
  info("Starting browser_dbg_bfcache.js's `test`.");

  ([gTab, gDebuggee, gPanel]) = yield initDebugger(TAB_URL_1);
  gDebugger = gPanel.panelWin;
  gSources = gDebugger.DebuggerView.Sources;

  yield testFirstPage();
  yield testLocationChange();
  yield testBack();
  yield testForward();
  return closeDebuggerAndFinish(gPanel);
});

function testFirstPage() {
  info("Testing first page.");

  // Spin the event loop before causing the debuggee to pause, to allow
  // this function to return first.
  executeSoon(() => gDebuggee.firstCall());

  return waitForSourceAndCaretAndScopes(gPanel, "-02.js", 1)
    .then(validateFirstPage);
}

function testLocationChange() {
  info("Navigating to a different page.");

  return navigateActiveTabTo(gPanel,
                             TAB_URL_2,
                             gDebugger.EVENTS.SOURCES_ADDED)
    .then(validateSecondPage);
}

function testBack() {
  info("Going back.");

  return navigateActiveTabInHistory(gPanel,
                                    "back",
                                    gDebugger.EVENTS.SOURCES_ADDED)
    .then(validateFirstPage);
}

function testForward() {
  info("Going forward.");

  return navigateActiveTabInHistory(gPanel,
                                    "forward",
                                    gDebugger.EVENTS.SOURCES_ADDED)
    .then(validateSecondPage);
}

function validateFirstPage() {
  is(gSources.itemCount, 2,
    "Found the expected number of sources.");
  ok(gSources.getItemForAttachment(e => e.label == "code_script-switching-01.js"),
    "Found the first source label.");
  ok(gSources.getItemForAttachment(e => e.label == "code_script-switching-02.js"),
    "Found the second source label.");
}

function validateSecondPage() {
  is(gSources.itemCount, 1,
    "Found the expected number of sources.");
  ok(gSources.getItemForAttachment(e => e.label == "doc_recursion-stack.html"),
    "Found the single source label.");
}

registerCleanupFunction(function() {
  gTab = null;
  gDebuggee = null;
  gPanel = null;
  gDebugger = null;
  gSources = null;
});
