Tests for channel subscriptions

test/connection/subscriptions_test.rb

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+require 'test_helper'
+
+class ActionCable::Connection::SubscriptionsTest < ActiveSupport::TestCase
+  class Connection < ActionCable::Connection::Base
+    attr_reader :websocket
+  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
+    @server.stubs(:channel_classes).returns([ ChatChannel ])
+
+    env = Rack::MockRequest.env_for "/test", 'HTTP_CONNECTION' => 'upgrade', 'HTTP_UPGRADE' => 'websocket'
+    @connection = Connection.new(@server, env)
+
+    @subscriptions = ActionCable::Connection::Subscriptions.new(@connection)
+    @chat_identifier = { id: 1, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel' }.to_json
+  end
+
+  test "subscribe command" do
+    channel = subscribe_to_chat_channel
+
+    assert_kind_of ChatChannel, channel
+    assert_equal 1, channel.room.id
+  end
+
+  test "subscribe command without an identifier" do
+    @subscriptions.execute_command 'command' => 'subscribe'
+    assert @subscriptions.identifiers.empty?
+  end
+
+  test "unsubscribe command" do
+    subscribe_to_chat_channel
+
+    channel = subscribe_to_chat_channel
+    channel.expects(:unsubscribe_from_channel)
+
+    @subscriptions.execute_command 'command' => 'unsubscribe', 'identifier' => @chat_identifier
+    assert @subscriptions.identifiers.empty?
+  end
+
+  test "unsubscribe command without an identifier" do
+    @subscriptions.execute_command 'command' => 'unsubscribe'
+    assert @subscriptions.identifiers.empty?
+  end
+
+  test "message command" do
+    channel = subscribe_to_chat_channel
+
+    data = { 'content' => 'Hello World!', 'action' => 'speak' }
+    @subscriptions.execute_command 'command' => 'message', 'identifier' => @chat_identifier, 'data' => data.to_json
+
+    assert_equal [ data ], channel.lines
+  end
+
+  test "unsubscrib from all" do
+    channel1 = subscribe_to_chat_channel
+
+    channel2_id = { id: 2, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel' }.to_json
+    channel2 = subscribe_to_chat_channel(channel2_id)
+
+    channel1.expects(:unsubscribe_from_channel)
+    channel2.expects(:unsubscribe_from_channel)
+
+    @subscriptions.unsubscribe_from_all
+  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
+end