Method: ActionCable::TestHelper#assert_broadcasts

Defined in:
actioncable/lib/action_cable/test_helper.rb

#assert_broadcasts(stream, number, &block) ⇒ Object

Asserts that the number of broadcasted messages to the stream matches the given number.

def test_broadcasts
  assert_broadcasts 'messages', 0
  ActionCable.server.broadcast 'messages', { text: 'hello' }
  assert_broadcasts 'messages', 1
  ActionCable.server.broadcast 'messages', { text: 'world' }
  assert_broadcasts 'messages', 2
end

If a block is passed, that block should cause the specified number of messages to be broadcasted.

def test_broadcasts_again
  assert_broadcasts('messages', 1) do
    ActionCable.server.broadcast 'messages', { text: 'hello' }
  end

  assert_broadcasts('messages', 2) do
    ActionCable.server.broadcast 'messages', { text: 'hi' }
    ActionCable.server.broadcast 'messages', { text: 'how are you?' }
  end
end



48
49
50
51
52
53
54
55
56
57
58
 
# File 'actioncable/lib/action_cable/test_helper.rb', line 48

def assert_broadcasts(stream, number, &block)
  if block_given?
    new_messages = new_broadcasts_from(broadcasts(stream), stream, "assert_broadcasts", &block)

    actual_count = new_messages.size
    assert_equal number, actual_count, "#{number} broadcasts to #{stream} expected, but #{actual_count} were sent"
  else
    actual_count = broadcasts(stream).size
    assert_equal number, actual_count, "#{number} broadcasts to #{stream} expected, but #{actual_count} were sent"
  end
end