blob: 3773d8f0a8187ccd8083163488a5953cdb986fd8 (
plain)
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
|
# -*- encoding: us-ascii -*-
require_relative '../../../spec_helper'
require_relative 'shared/select'
describe "Enumerator::Lazy#select" do
it_behaves_like :enumerator_lazy_select, :select
it "doesn't pre-evaluate the next element" do
eval_count = 0
enum = %w[Text1 Text2 Text3].lazy.select do
eval_count += 1
true
end
eval_count.should == 0
enum.next
eval_count.should == 1
end
it "doesn't over-evaluate when peeked" do
eval_count = 0
enum = %w[Text1 Text2 Text3].lazy.select do
eval_count += 1
true
end
eval_count.should == 0
enum.peek
enum.peek
eval_count.should == 1
end
it "doesn't re-evaluate after peek" do
eval_count = 0
enum = %w[Text1 Text2 Text3].lazy.select do
eval_count += 1
true
end
eval_count.should == 0
enum.peek
eval_count.should == 1
enum.next
eval_count.should == 1
end
end
|
