add unit test

tests/signal.js

@@ -8,6 +8,7 @@ const Gtk = gi.require('Gtk', '3.0')
 const Gdk = gi.require('Gdk', '3.0')
 const GObject = gi.require('GObject')
 const { describe, it, mustThrow, assert, expect } = require('./__common__.js')
+const common = require("./__common__");
 
 gi.startLoop()
 Gtk.init()
@@ -86,6 +87,20 @@ window.on('show', () => {
     )
   })
 
+  describe('Trigger "on-focus-out-event" should work', async () => new Promise((resolve) => {
+    const entry = new Gtk.SearchEntry();
+    const event = new Gdk.EventFocus()
+    event.type = Gdk.EventType.FOCUS_CHANGE
+    event.window = entry.getWindow()
+    event.sendEvent = 1
+
+    entry.on('focus-out-event', (event) => {
+      resolve();
+    })
+
+    const result = entry.emit('focus-out-event', event)
+  }));
+
   describe('types are as correct as possible', () => {
     const event = new Gdk.EventButton()
     event.type = Gdk.EventType.BUTTON_PRESS