1 files changed, 119 insertions, 0 deletions
diff --git a/actioncable/test/connection/subscriptions_test.rb b/actioncable/test/connection/subscriptions_test.rb
new file mode 100644
index 0000000000..902085c5d6
--- /dev/null
+++ b/actioncable/test/connection/subscriptions_test.rb
@@ -0,0 +1,119 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class ActionCable::Connection::SubscriptionsTest < ActionCable::TestCase
+  class Connection < ActionCable::Connection::Base
+    attr_reader :websocket
+
+    def send_async(method, *args)
+      send method, *args
+    end
+  end
+
+  class ChatChannel < ActionCable::Channel::Base
+    attr_reader :room, :lines
+
+    def subscribed
+      @room = Room.new params[:id]
+      @lines = []
+    end
+
+    def speak(data)
+      @lines << data
+    end
+  end
+
+  setup do
+    @server = TestServer.new
+
+    @chat_identifier = ActiveSupport::JSON.encode(id: 1, channel: "ActionCable::Connection::SubscriptionsTest::ChatChannel")
+  end
+
+  test "subscribe command" do
+    run_in_eventmachine do
+      setup_connection
+      channel = subscribe_to_chat_channel
+
+      assert_kind_of ChatChannel, channel
+      assert_equal 1, channel.room.id
+    end
+  end
+
+  test "subscribe command without an identifier" do
+    run_in_eventmachine do
+      setup_connection
+
+      @subscriptions.execute_command "command" => "subscribe"
+      assert_empty @subscriptions.identifiers
+    end
+  end
+
+  test "unsubscribe command" do
+    run_in_eventmachine do
+      setup_connection
+      subscribe_to_chat_channel
+
+      channel = subscribe_to_chat_channel
+
+      assert_called(channel, :unsubscribe_from_channel) do
+        @subscriptions.execute_command "command" => "unsubscribe", "identifier" => @chat_identifier
+      end
+
+      assert_empty @subscriptions.identifiers
+    end
+  end
+
+  test "unsubscribe command without an identifier" do
+    run_in_eventmachine do
+      setup_connection
+
+      @subscriptions.execute_command "command" => "unsubscribe"
+      assert_empty @subscriptions.identifiers
+    end
+  end
+
+  test "message command" do
+    run_in_eventmachine do
+      setup_connection
+      channel = subscribe_to_chat_channel
+
+      data = { "content" => "Hello World!", "action" => "speak" }
+      @subscriptions.execute_command "command" => "message", "identifier" => @chat_identifier, "data" => ActiveSupport::JSON.encode(data)
+
+      assert_equal [ data ], channel.lines
+    end
+  end
+
+  test "unsubscribe from all" do
+    run_in_eventmachine do
+      setup_connection
+
+      channel1 = subscribe_to_chat_channel
+
+      channel2_id = ActiveSupport::JSON.encode(id: 2, channel: "ActionCable::Connection::SubscriptionsTest::ChatChannel")
+      channel2 = subscribe_to_chat_channel(channel2_id)
+
+      assert_called(channel1, :unsubscribe_from_channel) do
+        assert_called(channel2, :unsubscribe_from_channel) do
+          @subscriptions.unsubscribe_from_all
+        end
+      end
+    end
+  end
+
+  private
+    def subscribe_to_chat_channel(identifier = @chat_identifier)
+      @subscriptions.execute_command "command" => "subscribe", "identifier" => identifier
+      assert_equal identifier, @subscriptions.identifiers.last
+
+      @subscriptions.send :find, "identifier" => identifier
+    end
+
+    def setup_connection
+      env = Rack::MockRequest.env_for "/test", "HTTP_HOST" => "localhost", "HTTP_CONNECTION" => "upgrade", "HTTP_UPGRADE" => "websocket"
+      @connection = Connection.new(@server, env)
+
+      @subscriptions = ActionCable::Connection::Subscriptions.new(@connection)
+    end
+end