updated index to copy all instances, and added snippet tests

Author: Daniel Jih

amplitude.js

@@ -96,11 +96,16 @@
 var Amplitude = require('./amplitude');
 
 var old = window.amplitude || {};
-var instance = new Amplitude();
-instance._q = old._q || [];
+var newInstance = new Amplitude();
+newInstance._q = old._q || [];
+for (var instance in old._iq) { // migrate eat instance's queue
+  if (old._iq.hasOwnProperty(instance)) {
+    newInstance.getInstance(instance)._q = old._iq[instance]._q || [];
+  }
+}
 
 // export the instance
-module.exports = instance;
+module.exports = newInstance;
 
 }, {"./amplitude":2}],
 2: [function(require, module, exports) {

amplitude.min.js

@@ -3,8 +3,13 @@
 var Amplitude = require('./amplitude');
 
 var old = window.amplitude || {};
-var instance = new Amplitude();
-instance._q = old._q || [];
+var newInstance = new Amplitude();
+newInstance._q = old._q || [];
+for (var instance in old._iq) { // migrate eat instance's queue
+  if (old._iq.hasOwnProperty(instance)) {
+    newInstance.getInstance(instance)._q = old._iq[instance]._q || [];
+  }
+}
 
 // export the instance
-module.exports = instance;
+module.exports = newInstance;

src/index.js

@@ -32,4 +32,24 @@ describe('Snippet', function() {
     assert.deepEqual(revenue._q[1], ['setQuantity', 5]);
     assert.deepEqual(revenue._q[2], ['setPrice', 10.99]);
   });
+
+  it('amplitude object should proxy instance functions', function() {
+    amplitude.getInstance(null).init('API_KEY');
+    amplitude.getInstance('$DEFAULT_instance').logEvent('Click');
+    amplitude.getInstance('').clearUserProperties();
+    amplitude.getInstance('INSTANCE1').init('API_KEY1');
+    amplitude.getInstance('instanCE2').init('API_KEY2');
+    amplitude.getInstance('instaNce2').logEvent('Event');
+
+    assert.deepEqual(Object.keys(amplitude._iq), ['$default_instance', 'instance1', 'instance2']);
+    assert.lengthOf(amplitude._iq['$default_instance']._q, 3);
+    assert.deepEqual(amplitude._iq['$default_instance']._q[0], ['init', 'API_KEY']);
+    assert.deepEqual(amplitude._iq['$default_instance']._q[1], ['logEvent', 'Click']);
+    assert.deepEqual(amplitude._iq['$default_instance']._q[2], ['clearUserProperties']);
+    assert.lengthOf(amplitude._iq['instance1']._q, 1);
+    assert.deepEqual(amplitude._iq['instance1']._q[0], ['init', 'API_KEY1']);
+    assert.lengthOf(amplitude._iq['instance2']._q, 2);
+    assert.deepEqual(amplitude._iq['instance2']._q[0], ['init', 'API_KEY2']);
+    assert.deepEqual(amplitude._iq['instance2']._q[1], ['logEvent', 'Event']);
+  });
 });