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require 'test_helper'
require 'tins/xt'
module Tins
class CountByTest < Test::Unit::TestCase
def test_count_by
assert_equal 0, [].count_by { |x| x % 2 == 0 }
assert_equal 0, [ 1 ].count_by { |x| x % 2 == 0 }
assert_equal 1, [ 1 ].count_by { |x| x % 2 == 1 }
assert_equal 1, [ 1, 2 ].count_by { |x| x % 2 == 0 }
assert_equal 1, [ 1, 2 ].count_by { |x| x % 2 == 1 }
assert_equal 2, [ 1, 2, 3, 4, 5 ].count_by { |x| x % 2 == 0 }
assert_equal 3, [ 1, 2, 3, 4, 5 ].count_by { |x| x % 2 == 1 }
end
end
end
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