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
|
require_relative '../../../spec_helper'
require_relative 'fixtures/classes'
describe 'Enumerator::Lazy#uniq' do
context 'without block' do
before :each do
@lazy = [0, 1, 0, 1].to_enum.lazy.uniq
end
it 'returns a lazy enumerator' do
@lazy.should be_an_instance_of(Enumerator::Lazy)
@lazy.force.should == [0, 1]
end
it 'return same value after rewind' do
@lazy.force.should == [0, 1]
@lazy.force.should == [0, 1]
end
it 'sets the size to nil' do
@lazy.size.should == nil
end
end
context 'when yielded with an argument' do
before :each do
@lazy = [0, 1, 2, 3].to_enum.lazy.uniq(&:even?)
end
it 'returns a lazy enumerator' do
@lazy.should be_an_instance_of(Enumerator::Lazy)
@lazy.force.should == [0, 1]
end
it 'return same value after rewind' do
@lazy.force.should == [0, 1]
@lazy.force.should == [0, 1]
end
it 'sets the size to nil' do
@lazy.size.should == nil
end
end
context 'when yielded with multiple arguments' do
before :each do
enum = Object.new.to_enum
class << enum
def each
yield 0, 'foo'
yield 1, 'FOO'
yield 2, 'bar'
end
end
@lazy = enum.lazy
end
it 'return same value after rewind' do
enum = @lazy.uniq { |_, label| label.downcase }
enum.force.should == [[0, 'foo'], [2, 'bar']]
enum.force.should == [[0, 'foo'], [2, 'bar']]
end
it 'returns all yield arguments as an array' do
@lazy.uniq { |_, label| label.downcase }.force.should == [[0, 'foo'], [2, 'bar']]
end
end
it "works with an infinite enumerable" do
s = 0..Float::INFINITY
s.lazy.uniq.first(100).should ==
s.first(100).uniq
end
end
|
