Sha256: f1a6a9889a933eb4190516601f1fd65dea74e091cd41bc2eee390a2b9652fcf5
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Size: 647 Bytes
Versions: 41
Compression:
Stored size: 647 Bytes
Contents
require 'test_helper'
# This tests our Array extension
class ArrayTest < Minitest::Test
test 'Arrays should be extended with #permutations' do
assert [].respond_to?(:permutations)
end
test 'Array#permutations should calculate permutations correctly' do
array = [1, 2, 3]
permutations = [[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]
assert_equal array.length.factorial, array.permutations.length
assert_equal permutations.sort, array.permutations.sort
end
test 'Array#permutations should permute duplicates' do
array = [1, 1]
assert_equal [[1, 1], [1, 1]], array.permutations
end
end
Version data entries
41 entries across 41 versions & 1 rubygems