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
|
require 'spec_helper'
describe Immutable::Hash do
[:select, :find_all, :keep_if].each do |method|
describe "##{method}" do
let(:original) { H['A' => 'aye', 'B' => 'bee', 'C' => 'see'] }
context 'when everything matches' do
it 'returns self' do
original.send(method) { |key, value| true }.should equal(original)
end
end
context 'when only some things match' do
context 'with a block' do
let(:result) { original.send(method) { |key, value| key == 'A' && value == 'aye' }}
it 'preserves the original' do
original.should eql(H['A' => 'aye', 'B' => 'bee', 'C' => 'see'])
end
it 'returns a set with the matching values' do
result.should eql(H['A' => 'aye'])
end
end
it 'yields entries as [key, value] pairs' do
original.send(method) do |e|
e.should be_kind_of(Array)
['A', 'B', 'C'].include?(e[0]).should == true
['aye', 'bee', 'see'].include?(e[1]).should == true
end
end
context 'with no block' do
it 'returns an Enumerator' do
original.send(method).class.should be(Enumerator)
original.send(method).to_a.sort.should == [['A', 'aye'], ['B', 'bee'], ['C', 'see']]
end
end
end
it 'works on a large hash, with many combinations of input' do
keys = (1..1000).to_a
original = H.new(keys.zip(2..1001))
25.times do
threshold = rand(1000)
result = original.send(method) { |k,v| k <= threshold }
result.size.should == threshold
result.each_key { |k| k.should <= threshold }
(threshold+1).upto(1000) { |k| result.key?(k).should == false }
end
original.should eql(H.new(keys.zip(2..1001))) # shouldn't have changed
end
end
end
end
|
