From 911bb7b54c535bd79f92db60d1a7f0d027ebc4e5 Mon Sep 17 00:00:00 2001
From: Kenta Murata <mrkn@mrkn.jp>
Date: Mon, 24 May 2021 23:21:54 +0900
Subject: [PATCH] Add initialized event

Co-authored-by: Yuki INOUE <inoueyuworks@gmail.com>
---
 lib/iruby/kernel.rb       |  7 ++++++-
 test/iruby/kernel_test.rb | 19 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/lib/iruby/kernel.rb b/lib/iruby/kernel.rb
index d05ddfe..d30a2b2 100644
--- a/lib/iruby/kernel.rb
+++ b/lib/iruby/kernel.rb
@@ -5,7 +5,10 @@ class Kernel
     RED = "\e[31m"
     RESET = "\e[0m"
 
-    class<< self
+    @events = EventManager.new([:initialized])
+
+    class << self
+      attr_reader :events
       attr_accessor :instance
     end
 
@@ -33,6 +36,8 @@ def initialize(config_file, session_adapter_name=nil)
       @execution_count = 0
       @backend = create_backend
       @running = true
+
+      self.class.events.trigger(:initialized, self)
     end
 
     attr_reader :events
diff --git a/test/iruby/kernel_test.rb b/test/iruby/kernel_test.rb
index af7e1f5..db317a1 100644
--- a/test/iruby/kernel_test.rb
+++ b/test/iruby/kernel_test.rb
@@ -8,6 +8,25 @@ def setup
       @kernel = IRuby::Kernel.instance
     end
 
+    sub_test_case("iruby_initialized event") do
+      def setup
+        super
+        @initialized_kernel = nil
+        @callback = IRuby::Kernel.events.register(:initialized) do |kernel|
+          @initialized_kernel = kernel
+        end
+      end
+
+      def teardown
+        IRuby::Kernel.events.unregister(:initialized, @callback)
+      end
+
+      def test_iruby_initialized_event
+        with_session_adapter("test")
+        assert_same(IRuby::Kernel.instance, @initialized_kernel)
+      end
+    end
+
     def test_execute_request
       obj = Object.new