app.js

// Test Runner - Online Code Debuging Framework for Titanium Mobile(iOS) 
var tabGroup = Titanium.UI.createTabGroup();
tabGroup.addTab(Titanium.UI.createTab({
	icon:'KS_nav_views.png',
	title:'Test Runner',
	window: Titanium.UI.createWindow({
		title:'Test Runner',
		backgroundColor:'#fff',
		url: 'testrunner.js'
	})
}));
tabGroup.open();

buttons.js

var button = Ti.UI.createButton({title: 'hoge', top:150, width:100, height:50});
Ti.UI.currentWindow.add(button);
button.addEventListener('click', function(){
	if(Titanium.Geolocation.hasCompass){
		Titanium.Geolocation.addEventListener("heading", function(e){
			if(e.error){
				Titanium.API.error(e.error);
				return;
			}
			button.title = e.heading.trueHeading;
		});
	}
	else{
	    alert('not supported.');
	}
});

camera.js

var button = Ti.UI.createButton({title: 'hoge', top:150, width:100, height:50});
Ti.UI.currentWindow.add(button);
button.addEventListener('click', function(){
	Ti.Media.showCamera({
		success:function(e){
			var f = Ti.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory,'camera_photo.png');
			f.write(e.media);
			Titanium.UI.currentWindow.backgroundImage = f.nativePath;
		}
	});
});

test.json

{
  "data":[
     {"title":"buttons", "url":"buttons.js"},
     {"title":"fork test", "url":"camera.js"}
  ]
}

testrunner.js

var baseURL = 'https://gist.github.com/raw/846009/';

var tv = Ti.UI.createTableView();
tv.addEventListener('click', function(e){
	if(e.rowData  && e.rowData.url){
		var xhr = Titanium.Network.createHTTPClient({
			onload: function(){
				var f = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, 'test.js');
				f.write(this.responseData);
				var w = Ti.UI.createWindow({title: e.rowData.title, url:f.resolve()});
				Ti.UI.currentTab.open(w);
			}
		});
		xhr.open('GET', baseURL + e.rowData.url);
		xhr.send();
	}
});
Ti.UI.currentWindow.add(tv);

var loadJson = function(){
	var xhr = Titanium.Network.createHTTPClient({
		onload: function(){
			var json = JSON.parse(xhr.responseText);
			tv.data = json.data;
		}
	});
	xhr.open('GET', baseURL + 'test.json');
	xhr.send();
};

Ti.UI.currentWindow.rightNavButton = ((function(){
	var b = Titanium.UI.createButton({systemButton: Titanium.UI.iPhone.SystemButton.REFRESH});
	b.addEventListener('click', function(){
		loadJson();
	});
	return b;
})());

loadJson();