From 7becda9f31cac399172058e0ed4daddcb25c768e Mon Sep 17 00:00:00 2001
From: Thibault Jouan <tj@a13.fr>
Date: Wed, 8 Apr 2015 23:37:02 +0000
Subject: [PATCH] Implement Dispatcher#emit

---
 lib/uh/wm/dispatcher.rb       |  4 ++++
 spec/uh/wm/dispatcher_spec.rb | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/lib/uh/wm/dispatcher.rb b/lib/uh/wm/dispatcher.rb
index a7b0298..697e5af 100644
--- a/lib/uh/wm/dispatcher.rb
+++ b/lib/uh/wm/dispatcher.rb
@@ -16,6 +16,10 @@ module Uh
         @hooks[translate_key key] << block
       end
 
+      def emit *key
+        @hooks[translate_key key].tap { |o| o.each { |e| e.call } if o }
+      end
+
 
       private
 
diff --git a/spec/uh/wm/dispatcher_spec.rb b/spec/uh/wm/dispatcher_spec.rb
index 277a02a..bd06d11 100644
--- a/spec/uh/wm/dispatcher_spec.rb
+++ b/spec/uh/wm/dispatcher_spec.rb
@@ -39,6 +39,26 @@ module Uh
           expect(dispatcher.hooks[%i[hook key]]).to be
         end
       end
+
+      describe '#emit' do
+        it 'calls hooks registered for given key' do
+          dispatcher.on(:hook_key) { throw :hook_code }
+          expect { dispatcher.emit :hook_key }.to throw_symbol :hook_code
+        end
+
+        context 'when no hooks are registered for given key' do
+          it 'does not call another hook' do
+            dispatcher.on(:hook_key) { throw :hook_code }
+            expect { dispatcher.emit :other_hook_key }.not_to throw_symbol
+          end
+        end
+
+        context 'when no hooks are registered at all' do
+          it 'does not raise any error' do
+            expect { dispatcher.emit :hook_key }.not_to raise_error
+          end
+        end
+      end
     end
   end
 end