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add_task(function* test() {
yield BrowserTestUtils.withNewTab("data:text/plain;charset=utf-8,1", function* (browser) {
BrowserTestUtils.loadURI(browser, "data:text/plain;charset=utf-8,2");
yield BrowserTestUtils.browserLoaded(browser);
BrowserTestUtils.loadURI(browser, "data:text/plain;charset=utf-8,3");
yield BrowserTestUtils.browserLoaded(browser);
yield duplicate(0, "maintained the original index");
yield BrowserTestUtils.removeTab(gBrowser.selectedTab);
yield duplicate(-1, "went back");
yield duplicate(1, "went forward");
yield BrowserTestUtils.removeTab(gBrowser.selectedTab);
yield BrowserTestUtils.removeTab(gBrowser.selectedTab);
});
});
function promiseGetIndex(browser) {
return ContentTask.spawn(browser, null, function() {
let shistory = docShell.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsISHistory);
return shistory.index;
});
}
let duplicate = Task.async(function* (delta, msg, cb) {
var startIndex = yield promiseGetIndex(gBrowser.selectedBrowser);
duplicateTabIn(gBrowser.selectedTab, "tab", delta);
let tab = gBrowser.selectedTab;
yield BrowserTestUtils.waitForEvent(tab, "SSTabRestored");
let endIndex = yield promiseGetIndex(gBrowser.selectedBrowser);
is(endIndex, startIndex + delta, msg);
});
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