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
|
require 'spec_helper'
describe Immutable::Hash do
describe '#hash' do
it 'values are sufficiently distributed' do
(1..4000).each_slice(4).map { |ka, va, kb, vb| H[ka => va, kb => vb].hash }.uniq.size.should == 1000
end
it 'differs given the same keys and different values' do
H['ka' => 'va'].hash.should_not == H['ka' => 'vb'].hash
end
it 'differs given the same values and different keys' do
H['ka' => 'va'].hash.should_not == H['kb' => 'va'].hash
end
it 'generates the same hash value for a hash regardless of the order things were added to it' do
key1 = DeterministicHash.new('abc', 1)
key2 = DeterministicHash.new('xyz', 1)
H.empty.put(key1, nil).put(key2, nil).hash.should == H.empty.put(key2, nil).put(key1, nil).hash
end
describe 'on an empty hash' do
it 'returns 0' do
H.empty.hash.should == 0
end
end
end
end
|
