Add "booting" flag and emit "booted" event

lib/executor.js

@@ -16,6 +16,10 @@ var path = require('path');
  */
 
 module.exports = function execute(app, instructions, callback) {
+  callback = callback || function() {};
+
+  app.booting = true;
+
   patchAppLoopback(app);
   assertLoopBackVersion(app);
 
@@ -37,7 +41,15 @@ module.exports = function execute(app, instructions, callback) {
     function(done) {
       enableAnonymousSwagger(app, instructions);
       done();
-    }], callback);
+    }], function(err) {
+      app.booting = false;
+
+      if (err) return callback(err);
+
+      app.emit('booted');
+
+      callback();
+    });
 };
 
 function patchAppLoopback(app) {

test/executor.test.js

@@ -52,6 +52,32 @@ describe('executor', function() {
     }
   });
 
+  describe('when booting', function() {
+    it('should set the booting status', function(done) {
+      expect(app.booting).to.be.undefined();
+      boot.execute(app, dummyInstructions, function(err) {
+        expect(err).to.be.undefined();
+        expect(app.booting).to.be.false();
+        done();
+      });
+    });
+
+    it('should emit the `booted` event', function(done) {
+      app.on('booted', function() {
+        // This test fails with a timeout when the `booted` event has not been
+        // emitted correctly
+        done();
+      });
+      boot.execute(app, dummyInstructions, function(err) {
+        expect(err).to.be.undefined();
+      });
+    });
+
+    it('should work when called synchronously', function() {
+      boot.execute(app, dummyInstructions);
+    });
+  });
+
   it('configures models', function() {
     boot.execute(app, dummyInstructions);
     assert(app.models);