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Contents
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |
# |_|\___||___/\__|
#
# for lib/facets/enumerable/combination.rb
require 'facets/enumerable/combination.rb'
require 'test/unit'
require 'set'
class TestEnumerableCombination < Test::Unit::TestCase
def test_combinations
a = [1,2]
b = [3,4]
z = Enumerable.combinations(a,b)
r = [[1,3],[1,4],[2,3],[2,4]]
assert_equal( r, z )
end
def test_combinations_of_three
a = %w|a b|
b = %w|a x|
c = %w|x y|
z = Enumerable.combinations(a, b, c)
r = [ ["a", "a", "x"],
["a", "a", "y"],
["a", "x", "x"],
["a", "x", "y"],
["b", "a", "x"],
["b", "a", "y"],
["b", "x", "x"],
["b", "x", "y"] ]
assert_equal( r, z )
end
def test_each_combination
r = []
a = [1,2,3,4]
a.each_combination(2){ |a,b| r << [a,b] }
assert_equal( [[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]], r )
end
# DEPRECATED
# def test_each_unique_pair
# r = []
# a = [1,2,3,4]
# a.each_unique_pair{ |a,b| r << [a,b] }
# assert_equal( [[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]], r )
# end
end
Version data entries
7 entries across 7 versions & 1 rubygems