Sound#stopの追加

lib/dxruby_sdl/sound.rb

@@ -21,7 +21,7 @@ def initialize(filename)
       end
     end
 
-    def_delegators :@sound, :play, :set_volume
+    def_delegators :@sound, :play, :set_volume, :stop
 
     alias_method :setVolume, :set_volume
 
@@ -39,6 +39,10 @@ def play
       def set_volume(volume, time = 0)
         raise NotImplementedError, 'Sound#set_volume(volume, time) with MIDI'
       end
+
+      def stop
+        SDL::Mixer.halt_music
+      end
     end
     private_constant :Music
 
@@ -65,6 +69,10 @@ def set_volume(volume, time = 0)
         end
         @wave.set_volume(volume)
       end
+
+      def stop
+        SDL::Mixer.halt(@last_played_channel)
+      end
     end
     private_constant :Wave
   end

spec/lib/dxruby_sdl/sound_spec.rb

@@ -2,6 +2,16 @@
 require 'spec_helper'
 
 describe DXRubySDL::Sound, '音を表すクラス' do
+  shared_context 'WAVE file', wave: true do
+    let(:path) { fixture_path('sound.wav') }
+    let(:sound) { DXRubySDL::Sound.new(path) }
+  end
+
+  shared_context 'MIDI file', midi: true do
+    let(:path) { fixture_path('bgm.mid') }
+    let(:sound) { DXRubySDL::Sound.new(path) }
+  end
+
   describe '.new' do
     shared_context '.new' do
       subject { DXRubySDL::Sound.new(fixture_path(filename)) }
@@ -25,10 +35,7 @@
   end
 
   describe '#play' do
-    context 'WAVE形式のファイルの場合' do
-      let(:path) { fixture_path('sound.wav') }
-      let(:sound) { DXRubySDL::Sound.new(path) }
-
+    context 'WAVE file', wave: true do
       subject { sound.play }
 
       it 'SDL::Mixer.play_channelを呼び出す' do
@@ -62,10 +69,7 @@
       end
     end
 
-    context 'MIDI形式のファイルの場合' do
-      let(:path) { fixture_path('bgm.mid') }
-      let(:sound) { DXRubySDL::Sound.new(path) }
-
+    context 'MIDI file', midi: true do
       subject { sound.play }
 
       it 'SDL::Mixer.play_musicを呼び出す' do
@@ -76,4 +80,40 @@
       end
     end
   end
+
+  describe '#stop' do
+    context 'WAVE file', wave: true do
+      let(:path) { fixture_path('sound.wav') }
+      let(:sound) { DXRubySDL::Sound.new(path) }
+
+      subject { sound.stop }
+
+      before do
+        allow(SDL::Mixer).to receive(:halt)
+        sound.play
+        subject
+      end
+
+      describe SDL::Mixer do
+        it { expect(SDL::Mixer).to have_received(:halt).with(0).once }
+      end
+    end
+
+    context 'MIDI file', midi: true do
+      let(:path) { fixture_path('bgm.mid') }
+      let(:sound) { DXRubySDL::Sound.new(path) }
+
+      subject { sound.stop }
+
+      before do
+        allow(SDL::Mixer).to receive(:halt_music)
+        sound.play
+        subject
+      end
+
+      describe SDL::Mixer do
+        it { expect(SDL::Mixer).to have_received(:halt_music).with(no_args).once }
+      end
+    end
+  end
 end