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
|
require 'spec_helper'
describe Immutable::Hash do
let(:hash) { H['A' => 'aye', 'B' => 'bee', 'C' => 'see'] }
describe '#take' do
it 'returns the first N key/val pairs from hash' do
hash.take(0).should == []
[[['A', 'aye']], [['B', 'bee']], [['C', 'see']]].include?(hash.take(1)).should == true
[['A', 'aye'], ['B', 'bee'], ['C', 'see']].combination(2).include?(hash.take(2).sort).should == true
hash.take(3).sort.should == [['A', 'aye'], ['B', 'bee'], ['C', 'see']]
hash.take(4).sort.should == [['A', 'aye'], ['B', 'bee'], ['C', 'see']]
end
end
describe '#take_while' do
it 'passes elements to the block until the block returns nil/false' do
passed = nil
hash.take_while { |k,v| passed = k; false }
['A', 'B', 'C'].include?(passed).should == true
end
it 'returns an array of all elements before the one which returned nil/false' do
count = 0
result = hash.take_while { count += 1; count < 3 }
[['A', 'aye'], ['B', 'bee'], ['C', 'see']].combination(2).include?(result.sort).should == true
end
it 'passes all elements if the block never returns nil/false' do
passed = []
hash.take_while { |k,v| passed << [k, v]; true }.should == hash.to_a
passed.sort.should == [['A', 'aye'], ['B', 'bee'], ['C', 'see']]
end
end
end
|
