1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
# frozen_string_literal: true
module ActionCable
# Provides helper methods for testing Action Cable broadcasting
module TestHelper
def before_setup # :nodoc:
server = ActionCable.server
test_adapter = ActionCable::SubscriptionAdapter::Test.new(server)
@old_pubsub_adapter = server.pubsub
server.instance_variable_set(:@pubsub, test_adapter)
super
end
def after_teardown # :nodoc:
super
ActionCable.server.instance_variable_set(:@pubsub, @old_pubsub_adapter)
end
# 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
#
def assert_broadcasts(stream, number)
if block_given?
original_count = broadcasts_size(stream)
yield
new_count = broadcasts_size(stream)
actual_count = new_count - original_count
else
actual_count = broadcasts_size(stream)
end
assert_equal number, actual_count, "#{number} broadcasts to #{stream} expected, but #{actual_count} were sent"
end
# Asserts that no messages have been sent to the stream.
#
# def test_no_broadcasts
# assert_no_broadcasts 'messages'
# ActionCable.server.broadcast 'messages', { text: 'hi' }
# assert_broadcasts 'messages', 1
# end
#
# If a block is passed, that block should not cause any message to be sent.
#
# def test_broadcasts_again
# assert_no_broadcasts 'messages' do
# # No job messages should be sent from this block
# end
# end
#
# Note: This assertion is simply a shortcut for:
#
# assert_broadcasts 'messages', 0, &block
#
def assert_no_broadcasts(stream, &block)
assert_broadcasts stream, 0, &block
end
# Asserts that the specified message has been sent to the stream.
#
# def test_assert_transmited_message
# ActionCable.server.broadcast 'messages', text: 'hello'
# assert_broadcast_on('messages', text: 'hello')
# end
#
# If a block is passed, that block should cause a message with the specified data to be sent.
#
# def test_assert_broadcast_on_again
# assert_broadcast_on('messages', text: 'hello') do
# ActionCable.server.broadcast 'messages', text: 'hello'
# end
# end
#
def assert_broadcast_on(stream, data)
# Encode to JSON and back–we want to use this value to compare
# with decoded JSON.
# Comparing JSON strings doesn't work due to the order if the keys.
serialized_msg =
ActiveSupport::JSON.decode(ActiveSupport::JSON.encode(data))
new_messages = broadcasts(stream)
if block_given?
old_messages = new_messages
clear_messages(stream)
yield
new_messages = broadcasts(stream)
clear_messages(stream)
# Restore all sent messages
(old_messages + new_messages).each { |m| pubsub_adapter.broadcast(stream, m) }
end
message = new_messages.find { |msg| ActiveSupport::JSON.decode(msg) == serialized_msg }
assert message, "No messages sent with #{data} to #{stream}"
end
def pubsub_adapter # :nodoc:
ActionCable.server.pubsub
end
delegate :broadcasts, :clear_messages, to: :pubsub_adapter
private
def broadcasts_size(channel)
broadcasts(channel).size
end
end
end
|
