michael@0: 'use strict';
michael@0: 
michael@0: const { setTimeout } = require('sdk/timers');
michael@0: const tabs = require('sdk/tabs');
michael@0: 
michael@0: let closeEvents = 0;
michael@0: const closeEventDetector = _ => closeEvents++;
michael@0: 
michael@0: exports.testNoTabCloseOnStartup = function(assert, done) {
michael@0:   setTimeout(_ => {
michael@0:     assert.equal(closeEvents, 0, 'there were no tab close events detected');
michael@0:     tabs.open({
michael@0:       url: 'about:mozilla',
michael@0:       inBackground: true,
michael@0:       onReady: tab => tab.close(),
michael@0:       onClose: _ => {
michael@0:         assert.equal(closeEvents, 1, 'there was one tab close event detected');
michael@0:         done();
michael@0:       }
michael@0:     })
michael@0:   });
michael@0: }
michael@0: 
michael@0: 
michael@0: exports.main = function() {
michael@0:   tabs.on('close', closeEventDetector);
michael@0: 
michael@0:   require("sdk/test/runner").runTestsFromModule(module);
michael@0: }