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Versions: 8
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Stored size: 1.23 KB
Contents
require 'spec_helper'
require 'bioinform/support/same_by'
describe Enumerable do
describe '#same_by?' do
it 'should be work with both hashes and arrays' do
['a','b','c'].same_by?{|k| k.length}
{'a'=>13,'b'=>12,'c'=>14}.same_by?{|k,v| v < 20}
end
it 'should be true for empty collections' do
[].same_by?(&:length).should be_true
[].same_by?.should be_true
end
context 'without block' do
it 'should compare if all elements of collection are the same' do
%w{cat cat cat}.same_by?.should be_true
%w{cat dog rat}.same_by?.should be_false
end
end
context 'with a block' do
it 'should compare enumerables by a value of block' do
%w{cat dog rat}.same_by?(&:length).should be_true
%w{cat dog rabbit}.same_by?(&:length).should be_false
end
it 'should be true if all elements are true' do
[4,8,2,2].same_by?(&:even?).should be_true
end
it 'should be true if all elements are false' do
[1,3,9,7].same_by?(&:even?).should be_true
end
it 'should be false if some elements are true and some are false' do
[1,8,3,2].same_by?(&:even?).should be_false
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems