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
|
# frozen_string_literal: true
require "helper"
RSpec.describe HTTP2::Emitter do
class Worker
include Emitter
def initialize
@listeners = Hash.new { |hash, key| hash[key] = [] }
end
end
let(:w) { Worker.new }
before(:each) do
@cnt = 0
end
it "should raise error on missing callback" do
expect { w.on(:a) {} }.to_not raise_error
expect { w.on(:a) }.to raise_error
end
it "should allow multiple callbacks on single event" do
cnt = 0
w.on(:a) { cnt += 1 }
w.on(:a) { cnt += 1 }
w.emit(:a)
expect(cnt).to eq 2
end
it "should execute callback with optional args" do
args = nil
w.on(:a) { |a| args = a }
w.emit(:a, 123)
expect(args).to eq 123
end
it "should pass emitted callbacks to listeners" do
cnt = 0
w.on(:a) { |&block| block.call }
w.once(:a) { |&block| block.call }
w.emit(:a) { cnt += 1 }
expect(cnt).to eq 2
end
it "should allow events with no callbacks" do
expect { w.emit(:missing) }.to_not raise_error
end
it "should execute callback exactly once" do
cnt = 0
w.on(:a) { cnt += 1 }
w.once(:a) { cnt += 1 }
w.emit(:a)
w.emit(:a)
expect(cnt).to eq 3
end
end
|
