Sha256: 15e14fec27cacdb162b8cc69ea27af2c6e0d842739daf55003a44b1097261e70
Contents?: true
Size: 697 Bytes
Versions: 8
Compression:
Stored size: 697 Bytes
Contents
require 'spec_helper'
unless Enumerable.method_defined? :sum
describe 'Enumerable#sum' do
it 'sums up the numbers of an enum' do
expect((1..3).sum).to eq(6)
end
it 'returns zero when invoked on an empty collection' do
expect([].sum).to be_zero
end
it 'returns the initial value when invoked on an empty collection' do
expect([].sum('')).to be_empty
end
it 'prepends the initial value to the sum' do
expect(['b', 'c'].sum('a')).to eq('abc')
end
it 'concatenates strings' do
expect(['a', 'b', 'c'].sum).to eq('abc')
end
it 'concatenates arrays' do
expect([[1], [2], [3]].sum).to eq([1, 2, 3])
end
end
end
Version data entries
8 entries across 6 versions & 4 rubygems