Enhancements to Revel command

Reformat of code
Allow user to use a mix of command line arguments and flags
Enhance the import tool to detect missing packages in the modules side
Added test cases for all commands

model/event_test.go

@@ -0,0 +1,24 @@
+package model_test
+
+import (
+	"github.com/revel/revel"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+// Test that the event handler can be attached and it dispatches the event received
+func TestEventHandler(t *testing.T) {
+	counter := 0
+	newListener := func(typeOf revel.Event, value interface{}) (responseOf revel.EventResponse) {
+		if typeOf == revel.REVEL_FAILURE {
+			counter++
+		}
+		return
+	}
+	// Attach the same handlder twice so we expect to see the response twice as well
+	revel.AddInitEventHandler(newListener)
+	revel.AddInitEventHandler(newListener)
+	revel.RaiseEvent(revel.REVEL_AFTER_MODULES_LOADED, nil)
+	revel.RaiseEvent(revel.REVEL_FAILURE, nil)
+	assert.Equal(t, counter, 2, "Expected event handler to have been called")
+}