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-rw-r--r--test/ruby/test_enum.rb257
1 files changed, 257 insertions, 0 deletions
diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
new file mode 100644
index 0000000000..6171c9a234
--- /dev/null
+++ b/test/ruby/test_enum.rb
@@ -0,0 +1,257 @@
+require 'test/unit'
+
+class TestEnumerable < Test::Unit::TestCase
+ def setup
+ @obj = Object.new
+ class << @obj
+ include Enumerable
+ def each
+ yield 1
+ yield 2
+ yield 3
+ yield 1
+ yield 2
+ end
+ end
+ @verbose = $VERBOSE
+ $VERBOSE = nil
+ end
+
+ def teardown
+ $VERBOSE = @verbose
+ end
+
+ def test_grep
+ assert_equal([1, 2, 1, 2], @obj.grep(1..2))
+ a = []
+ @obj.grep(2) {|x| a << x }
+ assert_equal([2, 2], a)
+ end
+
+ def test_count
+ assert_equal(2, @obj.count(1))
+ assert_equal(3, @obj.count {|x| x % 2 == 1 })
+ assert_equal(2, @obj.count(1) {|x| x % 2 == 1 })
+ assert_raise(ArgumentError) { @obj.count(0, 1) }
+ end
+
+ def test_find
+ assert_equal(2, @obj.find {|x| x % 2 == 0 })
+ assert_equal(nil, @obj.find {|x| false })
+ assert_equal(:foo, @obj.find(proc { :foo }) {|x| false })
+ end
+
+ def test_find_index
+ assert_equal(1, @obj.find_index(2))
+ assert_equal(1, @obj.find_index {|x| x % 2 == 0 })
+ assert_equal(nil, @obj.find_index {|x| false })
+ assert_raise(ArgumentError) { @obj.find_index(0, 1) }
+ end
+
+ def test_find_all
+ assert_equal([1, 3, 1], @obj.find_all {|x| x % 2 == 1 })
+ end
+
+ def test_reject
+ assert_equal([2, 3, 2], @obj.reject {|x| x < 2 })
+ end
+
+ def test_to_a
+ assert_equal([1, 2, 3, 1, 2], @obj.to_a)
+ end
+
+ def test_inject
+ assert_equal(12, @obj.inject {|z, x| z * x })
+ assert_equal(48, @obj.inject {|z, x| z * 2 + x })
+ assert_equal(12, @obj.inject(:*))
+ assert_equal(24, @obj.inject(2) {|z, x| z * x })
+ assert_equal(24, @obj.inject(2, :*) {|z, x| z * x })
+ end
+
+ def test_partition
+ assert_equal([[1, 3, 1], [2, 2]], @obj.partition {|x| x % 2 == 1 })
+ end
+
+ def test_group_by
+ h = { 1 => [1, 1], 2 => [2, 2], 3 => [3] }
+ assert_equal(h, @obj.group_by {|x| x })
+ end
+
+ def test_first
+ assert_equal(1, @obj.first)
+ assert_equal([1, 2, 3], @obj.first(3))
+ end
+
+ def test_sort
+ assert_equal([1, 1, 2, 2, 3], @obj.sort)
+ end
+
+ def test_sort_by
+ assert_equal([3, 2, 2, 1, 1], @obj.sort_by {|x| -x })
+ end
+
+ def test_all
+ assert_equal(true, @obj.all? {|x| x <= 3 })
+ assert_equal(false, @obj.all? {|x| x < 3 })
+ assert_equal(true, @obj.all?)
+ assert_equal(false, [true, true, false].all?)
+ end
+
+ def test_any
+ assert_equal(true, @obj.any? {|x| x >= 3 })
+ assert_equal(false, @obj.any? {|x| x > 3 })
+ assert_equal(true, @obj.any?)
+ assert_equal(false, [false, false, false].any?)
+ end
+
+ def test_one
+ assert(@obj.one? {|x| x == 3 })
+ assert(!(@obj.one? {|x| x == 1 }))
+ assert(!(@obj.one? {|x| x == 4 }))
+ assert(%w{ant bear cat}.one? {|word| word.length == 4})
+ assert(!(%w{ant bear cat}.one? {|word| word.length > 4}))
+ assert(!(%w{ant bear cat}.one? {|word| word.length < 4}))
+ assert(!([ nil, true, 99 ].one?))
+ assert([ nil, true, false ].one?)
+ end
+
+ def test_none
+ assert(@obj.none? {|x| x == 4 })
+ assert(!(@obj.none? {|x| x == 1 }))
+ assert(!(@obj.none? {|x| x == 3 }))
+ assert(%w{ant bear cat}.none? {|word| word.length == 5})
+ assert(!(%w{ant bear cat}.none? {|word| word.length >= 4}))
+ assert([].none?)
+ assert([nil].none?)
+ assert([nil,false].none?)
+ end
+
+ def test_min
+ assert_equal(1, @obj.min)
+ assert_equal(3, @obj.min {|a,b| b <=> a })
+ a = %w(albatross dog horse)
+ assert_equal("albatross", a.min)
+ assert_equal("dog", a.min {|a,b| a.length <=> b.length })
+ assert_equal(1, [3,2,1].min)
+ end
+
+ def test_max
+ assert_equal(3, @obj.max)
+ assert_equal(1, @obj.max {|a,b| b <=> a })
+ a = %w(albatross dog horse)
+ assert_equal("horse", a.max)
+ assert_equal("albatross", a.max {|a,b| a.length <=> b.length })
+ assert_equal(1, [3,2,1].max{|a,b| b <=> a })
+ end
+
+ def test_minmax
+ assert_equal([1, 3], @obj.minmax)
+ assert_equal([3, 1], @obj.minmax {|a,b| b <=> a })
+ a = %w(albatross dog horse)
+ assert_equal(["albatross", "horse"], a.minmax)
+ assert_equal(["dog", "albatross"], a.minmax {|a,b| a.length <=> b.length })
+ assert_equal([1, 3], [2,3,1].minmax)
+ assert_equal([3, 1], [2,3,1].minmax {|a,b| b <=> a })
+ end
+
+ def test_min_by
+ assert_equal(3, @obj.min_by {|x| -x })
+ a = %w(albatross dog horse)
+ assert_equal("dog", a.min_by {|x| x.length })
+ assert_equal(3, [2,3,1].min_by {|x| -x })
+ end
+
+ def test_max_by
+ assert_equal(1, @obj.max_by {|x| -x })
+ a = %w(albatross dog horse)
+ assert_equal("albatross", a.max_by {|x| x.length })
+ assert_equal(1, [2,3,1].max_by {|x| -x })
+ end
+
+ def test_minmax_by
+ assert_equal([3, 1], @obj.minmax_by {|x| -x })
+ a = %w(albatross dog horse)
+ assert_equal(["dog", "albatross"], a.minmax_by {|x| x.length })
+ assert_equal([3, 1], [2,3,1].minmax_by {|x| -x })
+ end
+
+ def test_member
+ assert(@obj.member?(1))
+ assert(!(@obj.member?(4)))
+ assert([1,2,3].member?(1))
+ assert(!([1,2,3].member?(4)))
+ end
+
+ def test_each_with_index
+ a = []
+ @obj.each_with_index {|x, i| a << [x, i] }
+ assert_equal([[1,0],[2,1],[3,2],[1,3],[2,4]], a)
+
+ hash = Hash.new
+ %w(cat dog wombat).each_with_index do |item, index|
+ hash[item] = index
+ end
+ assert_equal({"cat"=>0, "wombat"=>2, "dog"=>1}, hash)
+ end
+
+ def test_zip
+ assert_equal([[1,1],[2,2],[3,3],[1,1],[2,2]], @obj.zip(@obj))
+ a = []
+ @obj.zip([:a, :b, :c]) {|x,y| a << [x, y] }
+ assert_equal([[1,:a],[2,:b],[3,:c],[1,nil],[2,nil]], a)
+ end
+
+ def test_take
+ assert_equal([1,2,3], @obj.take(3))
+ end
+
+ def test_take_while
+ assert_equal([1,2], @obj.take_while {|x| x <= 2})
+ end
+
+ def test_drop
+ assert_equal([3,1,2], @obj.drop(2))
+ end
+
+ def test_drop_while
+ assert_equal([3,1,2], @obj.drop_while {|x| x <= 2})
+ end
+
+ def test_cycle
+ assert_equal([1,2,3,1,2,1,2,3,1,2], @obj.cycle.take(10))
+ end
+
+ def test_callcc
+ assert_raise(RuntimeError) do
+ c = nil
+ @obj.sort_by {|x| callcc {|c2| c ||= c2 }; x }
+ c.call
+ end
+
+ assert_raise(RuntimeError) do
+ c = nil
+ o = Object.new
+ class << o; self; end.class_eval do
+ define_method(:<=>) do |x|
+ callcc {|c2| c ||= c2 }
+ 0
+ end
+ end
+ [o, o].sort_by {|x| x }
+ c.call
+ end
+
+ assert_raise(RuntimeError) do
+ c = nil
+ o = Object.new
+ class << o; self; end.class_eval do
+ define_method(:<=>) do |x|
+ callcc {|c2| c ||= c2 }
+ 0
+ end
+ end
+ [o, o, o].sort_by {|x| x }
+ c.call
+ end
+ end
+end
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