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-rw-r--r--test/ruby/test_enum.rb1112
1 files changed, 1034 insertions, 78 deletions
diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index 4b71f5b6cc..237bdc8a4d 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -1,5 +1,7 @@
+# frozen_string_literal: false
require 'test/unit'
-require 'continuation'
+EnvUtil.suppress_warning {require 'continuation'}
+require 'stringio'
class TestEnumerable < Test::Unit::TestCase
def setup
@@ -12,28 +14,80 @@ class TestEnumerable < Test::Unit::TestCase
yield 3
yield 1
yield 2
+ self
+ end
+ end
+ @empty = Object.new
+ class << @empty
+ attr_reader :block
+ include Enumerable
+ def each(&block)
+ @block = block
+ self
end
end
@verbose = $VERBOSE
- $VERBOSE = nil
end
def teardown
$VERBOSE = @verbose
end
+ def test_grep_v
+ assert_equal([3], @obj.grep_v(1..2))
+ a = []
+ @obj.grep_v(2) {|x| a << x }
+ assert_equal([1, 3, 1], a)
+
+ a = []
+ lambda = ->(x, i) {a << [x, i]}
+ @obj.each_with_index.grep_v(proc{|x,i|x!=2}, &lambda)
+ assert_equal([[2, 1], [2, 4]], a)
+ 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)
+
+ bug5801 = '[ruby-dev:45041]'
+ @empty.grep(//)
+ block = @empty.block
+ assert_nothing_raised(bug5801) {100.times {block.call}}
+
+ a = []
+ lambda = ->(x, i) {a << [x, i]}
+ @obj.each_with_index.grep(proc{|x,i|x==2}, &lambda)
+ assert_equal([[2, 1], [2, 4]], a)
+ end
+
+ def test_grep_optimization
+ bug17030 = '[ruby-core:99156]'
+ 'set last match' =~ /set last (.*)/
+ assert_equal([:a, 'b', :c], [:a, 'b', 'z', :c, 42, nil].grep(/[a-d]/), bug17030)
+ assert_equal(['z', 42, nil], [:a, 'b', 'z', :c, 42, nil].grep_v(/[a-d]/), bug17030)
+ assert_equal('match', $1, bug17030)
+
+ regexp = Regexp.new('x')
+ assert_equal([], @obj.grep(regexp), bug17030) # sanity check
+ def regexp.===(other)
+ true
+ end
+ assert_equal([1, 2, 3, 1, 2], @obj.grep(regexp), bug17030)
+
+ o = Object.new
+ def o.to_str
+ 'hello'
+ end
+ assert_same(o, [o].grep(/ll/).first, bug17030)
end
def test_count
assert_equal(5, @obj.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_equal(2, assert_warning(/given block not used/) {@obj.count(1) {|x| x % 2 == 1 }})
assert_raise(ArgumentError) { @obj.count(0, 1) }
if RUBY_ENGINE == "ruby"
@@ -52,6 +106,8 @@ class TestEnumerable < Test::Unit::TestCase
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 })
+ cond = ->(x, i) { x % 2 == 0 }
+ assert_equal([2, 1], @obj.each_with_index.find(&cond))
end
def test_find_index
@@ -59,49 +115,378 @@ class TestEnumerable < Test::Unit::TestCase
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) }
- assert_equal(1, @obj.find_index(2) {|x| x == 1 })
+ assert_equal(1, assert_warning(/given block not used/) {@obj.find_index(2) {|x| x == 1 }})
end
def test_find_all
assert_equal([1, 3, 1], @obj.find_all {|x| x % 2 == 1 })
+ cond = ->(x, i) { x % 2 == 1 }
+ assert_equal([[1, 0], [3, 2], [1, 3]], @obj.each_with_index.find_all(&cond))
end
def test_reject
assert_equal([2, 3, 2], @obj.reject {|x| x < 2 })
+ cond = ->(x, i) {x < 2}
+ assert_equal([[2, 1], [3, 2], [2, 4]], @obj.each_with_index.reject(&cond))
end
def test_to_a
assert_equal([1, 2, 3, 1, 2], @obj.to_a)
end
+ def test_to_a_keywords
+ @obj.singleton_class.remove_method(:each)
+ def @obj.each(foo:) yield foo end
+ assert_equal([1], @obj.to_a(foo: 1))
+ end
+
+ def test_to_a_size_symbol
+ sym = Object.new
+ class << sym
+ include Enumerable
+ def each
+ self
+ end
+
+ def size
+ :size
+ end
+ end
+ assert_equal([], sym.to_a)
+ end
+
+ def test_to_a_size_infinity
+ inf = Object.new
+ class << inf
+ include Enumerable
+ def each
+ self
+ end
+
+ def size
+ Float::INFINITY
+ end
+ end
+ assert_equal([], inf.to_a)
+ end
+
+ StubToH = Object.new.tap do |obj|
+ def obj.each(*args)
+ yield(*args)
+ yield [:key, :value]
+ yield :other_key, :other_value
+ kvp = Object.new
+ def kvp.to_ary
+ [:obtained, :via_to_ary]
+ end
+ yield kvp
+ end
+ obj.extend Enumerable
+ obj.freeze
+ end
+
+ def test_to_h
+ obj = StubToH
+
+ assert_equal({
+ :hello => :world,
+ :key => :value,
+ :other_key => :other_value,
+ :obtained => :via_to_ary,
+ }, obj.to_h(:hello, :world))
+
+ e = assert_raise(TypeError) {
+ obj.to_h(:not_an_array)
+ }
+ assert_equal "wrong element type Symbol (expected array)", e.message
+
+ e = assert_raise(ArgumentError) {
+ obj.to_h([1])
+ }
+ assert_equal "element has wrong array length (expected 2, was 1)", e.message
+ end
+
+ def test_to_h_block
+ obj = StubToH
+
+ assert_equal({
+ "hello" => "world",
+ "key" => "value",
+ "other_key" => "other_value",
+ "obtained" => "via_to_ary",
+ }, obj.to_h(:hello, :world) {|k, v| [k.to_s, v.to_s]})
+
+ e = assert_raise(TypeError) {
+ obj.to_h {:not_an_array}
+ }
+ assert_equal "wrong element type Symbol (expected array)", e.message
+
+ e = assert_raise(ArgumentError) {
+ obj.to_h {[1]}
+ }
+ assert_equal "element has wrong array length (expected 2, was 1)", e.message
+ 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 })
+ assert_equal(24, assert_warning(/given block not used/) {@obj.inject(2, :*) {|z, x| z * x }})
+ assert_equal(nil, @empty.inject() {9})
+
+ assert_raise(ArgumentError) {@obj.inject}
+ end
+
+ FIXNUM_MIN = RbConfig::LIMITS['FIXNUM_MIN']
+ FIXNUM_MAX = RbConfig::LIMITS['FIXNUM_MAX']
+
+ def test_inject_array_mul
+ assert_equal(nil, [].inject(:*))
+ assert_equal(5, [5].inject(:*))
+ assert_equal(35, [5, 7].inject(:*))
+ assert_equal(3, [].inject(3, :*))
+ assert_equal(15, [5].inject(3, :*))
+ assert_equal(105, [5, 7].inject(3, :*))
+ end
+
+ def test_inject_array_plus
+ assert_equal(3, [3].inject(:+))
+ assert_equal(8, [3, 5].inject(:+))
+ assert_equal(15, [3, 5, 7].inject(:+))
+ assert_float_equal(15.0, [3, 5, 7.0].inject(:+))
+ assert_equal(2*FIXNUM_MAX, Array.new(2, FIXNUM_MAX).inject(:+))
+ assert_equal(3*FIXNUM_MAX, Array.new(3, FIXNUM_MAX).inject(:+))
+ assert_equal(2*(FIXNUM_MAX+1), Array.new(2, FIXNUM_MAX+1).inject(:+))
+ assert_equal(10*FIXNUM_MAX, Array.new(10, FIXNUM_MAX).inject(:+))
+ assert_equal(0, ([FIXNUM_MAX, 1, -FIXNUM_MAX, -1]*10).inject(:+))
+ assert_equal(FIXNUM_MAX*10, ([FIXNUM_MAX+1, -1]*10).inject(:+))
+ assert_equal(2*FIXNUM_MIN, Array.new(2, FIXNUM_MIN).inject(:+))
+ assert_equal(3*FIXNUM_MIN, Array.new(3, FIXNUM_MIN).inject(:+))
+ assert_equal((FIXNUM_MAX+1).to_f, [FIXNUM_MAX, 1, 0.0].inject(:+))
+ assert_float_equal(10.0, [3.0, 5].inject(2.0, :+))
+ assert_float_equal((FIXNUM_MAX+1).to_f, [0.0, FIXNUM_MAX+1].inject(:+))
+ assert_equal(2.0+3.0i, [2.0, 3.0i].inject(:+))
+ end
+
+ def test_inject_op_redefined
+ assert_separately([], "#{<<~"end;"}\n""end")
+ k = Class.new do
+ include Enumerable
+ def each
+ yield 1
+ yield 2
+ yield 3
+ end
+ end
+ all_assertions_foreach("", *%i[+ * / - %]) do |op|
+ bug = '[ruby-dev:49510] [Bug#12178] should respect redefinition'
+ begin
+ Integer.class_eval do
+ alias_method :orig, op
+ define_method(op) do |x|
+ 0
+ end
+ end
+ assert_equal(0, k.new.inject(op), bug)
+ ensure
+ Integer.class_eval do
+ undef_method op
+ alias_method op, :orig
+ end
+ end
+ end;
+ end
+
+ def test_inject_op_private
+ assert_separately([], "#{<<~"end;"}\n""end")
+ k = Class.new do
+ include Enumerable
+ def each
+ yield 1
+ yield 2
+ yield 3
+ end
+ end
+ all_assertions_foreach("", *%i[+ * / - %]) do |op|
+ bug = '[ruby-core:81349] [Bug #13592] should respect visibility'
+ assert_raise_with_message(NoMethodError, /private method/, bug) do
+ begin
+ Integer.class_eval do
+ private op
+ end
+ k.new.inject(op)
+ ensure
+ Integer.class_eval do
+ public op
+ end
+ end
+ end
+ end;
+ end
+
+ def test_inject_array_op_redefined
+ assert_separately([], "#{<<~"end;"}\n""end")
+ all_assertions_foreach("", *%i[+ * / - %]) do |op|
+ bug = '[ruby-dev:49510] [Bug#12178] should respect redefinition'
+ begin
+ Integer.class_eval do
+ alias_method :orig, op
+ define_method(op) do |x|
+ 0
+ end
+ end
+ assert_equal(0, [1,2,3].inject(op), bug)
+ ensure
+ Integer.class_eval do
+ undef_method op
+ alias_method op, :orig
+ end
+ end
+ end;
+ end
+
+ def test_inject_array_op_private
+ assert_separately([], "#{<<~"end;"}\n""end")
+ all_assertions_foreach("", *%i[+ * / - %]) do |op|
+ bug = '[ruby-core:81349] [Bug #13592] should respect visibility'
+ assert_raise_with_message(NoMethodError, /private method/, bug) do
+ begin
+ Integer.class_eval do
+ private op
+ end
+ [1,2,3].inject(op)
+ ensure
+ Integer.class_eval do
+ public op
+ end
+ end
+ end
+ end;
+ end
+
+ def test_refine_Enumerable_then_include
+ assert_separately([], "#{<<~"end;"}\n")
+ module RefinementBug
+ refine Enumerable do
+ def refined_method
+ :rm
+ end
+ end
+ end
+ using RefinementBug
+
+ class A
+ include Enumerable
+ end
+
+ assert_equal(:rm, [].refined_method)
+ end;
end
def test_partition
assert_equal([[1, 3, 1], [2, 2]], @obj.partition {|x| x % 2 == 1 })
+ cond = ->(x, i) { x % 2 == 1 }
+ assert_equal([[[1, 0], [3, 2], [1, 3]], [[2, 1], [2, 4]]], @obj.each_with_index.partition(&cond))
end
def test_group_by
h = { 1 => [1, 1], 2 => [2, 2], 3 => [3] }
assert_equal(h, @obj.group_by {|x| x })
+
+ h = {1=>[[1, 0], [1, 3]], 2=>[[2, 1], [2, 4]], 3=>[[3, 2]]}
+ cond = ->(x, i) { x }
+ assert_equal(h, @obj.each_with_index.group_by(&cond))
+ end
+
+ def test_tally
+ h = {1 => 2, 2 => 2, 3 => 1}
+ assert_equal(h, @obj.tally)
+
+ h = {1 => 5, 2 => 2, 3 => 1, 4 => "x"}
+ assert_equal(h, @obj.tally({1 => 3, 4 => "x"}))
+
+ assert_raise(TypeError) do
+ @obj.tally({1 => ""})
+ end
+
+ h = {1 => 2, 2 => 2, 3 => 1}
+ assert_same(h, @obj.tally(h))
+
+ h = {1 => 2, 2 => 2, 3 => 1}.freeze
+ assert_raise(FrozenError) do
+ @obj.tally(h)
+ end
+ assert_equal({1 => 2, 2 => 2, 3 => 1}, h)
+
+ hash_convertible = Object.new
+ def hash_convertible.to_hash
+ {1 => 3, 4 => "x"}
+ end
+ assert_equal({1 => 5, 2 => 2, 3 => 1, 4 => "x"}, @obj.tally(hash_convertible))
+
+ hash_convertible = Object.new
+ def hash_convertible.to_hash
+ {1 => 3, 4 => "x"}.freeze
+ end
+ assert_raise(FrozenError) do
+ @obj.tally(hash_convertible)
+ end
+ assert_equal({1 => 3, 4 => "x"}, hash_convertible.to_hash)
+
+ assert_raise(TypeError) do
+ @obj.tally(BasicObject.new)
+ end
+
+ h = {1 => 2, 2 => 2, 3 => 1}
+ assert_equal(h, @obj.tally(Hash.new(100)))
+ assert_equal(h, @obj.tally(Hash.new {100}))
end
def test_first
assert_equal(1, @obj.first)
assert_equal([1, 2, 3], @obj.first(3))
+ assert_nil(@empty.first)
+ assert_equal([], @empty.first(10))
+
+ bug5801 = '[ruby-dev:45041]'
+ assert_in_out_err([], <<-'end;', [], /unexpected break/, bug5801)
+ empty = Object.new
+ class << empty
+ attr_reader :block
+ include Enumerable
+ def each(&block)
+ @block = block
+ self
+ end
+ end
+ empty.first
+ empty.block.call
+ end;
+
+ bug18475 = '[ruby-dev:107059]'
+ assert_in_out_err([], <<-'end;', [], /unexpected break/, bug18475)
+ e = Enumerator.new do |g|
+ Thread.new do
+ g << 1
+ end.join
+ end
+
+ e.first
+ end;
end
def test_sort
assert_equal([1, 1, 2, 2, 3], @obj.sort)
+ assert_equal([3, 2, 2, 1, 1], @obj.sort {|x, y| y <=> x })
end
def test_sort_by
assert_equal([3, 2, 2, 1, 1], @obj.sort_by {|x| -x })
+ assert_equal((1..300).to_a.reverse, (1..300).sort_by {|x| -x })
+
+ cond = ->(x, i) { [-x, i] }
+ assert_equal([[3, 2], [2, 1], [2, 4], [1, 0], [1, 3]], @obj.each_with_index.sort_by(&cond))
end
def test_all
@@ -109,6 +494,25 @@ class TestEnumerable < Test::Unit::TestCase
assert_equal(false, @obj.all? {|x| x < 3 })
assert_equal(true, @obj.all?)
assert_equal(false, [true, true, false].all?)
+ assert_equal(true, [].all?)
+ assert_equal(true, @empty.all?)
+ assert_equal(true, @obj.all?(Integer))
+ assert_equal(false, @obj.all?(1..2))
+ end
+
+ def test_all_with_unused_block
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ [1, 2].all?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ (1..2).all?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ 3.times.all?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ {a: 1, b: 2}.all?([:b, 2]) {|x| x == 4 }
+ EOS
end
def test_any
@@ -116,74 +520,166 @@ class TestEnumerable < Test::Unit::TestCase
assert_equal(false, @obj.any? {|x| x > 3 })
assert_equal(true, @obj.any?)
assert_equal(false, [false, false, false].any?)
+ assert_equal(false, [].any?)
+ assert_equal(false, @empty.any?)
+ assert_equal(true, @obj.any?(1..2))
+ assert_equal(false, @obj.any?(Float))
+ assert_equal(false, [1, 42].any?(Float))
+ assert_equal(true, [1, 4.2].any?(Float))
+ assert_equal(false, {a: 1, b: 2}.any?(->(kv) { kv == [:foo, 42] }))
+ assert_equal(true, {a: 1, b: 2}.any?(->(kv) { kv == [:b, 2] }))
+ end
+
+ def test_any_with_unused_block
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ [1, 23].any?(1) {|x| x == 1 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ (1..2).any?(34) {|x| x == 2 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ 3.times.any?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ {a: 1, b: 2}.any?([:b, 2]) {|x| x == 4 }
+ EOS
end
def test_one
assert(@obj.one? {|x| x == 3 })
assert(!(@obj.one? {|x| x == 1 }))
assert(!(@obj.one? {|x| x == 4 }))
+ assert(@obj.one?(3..4))
+ assert(!(@obj.one?(1..2)))
+ assert(!(@obj.one?(4..5)))
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(%w{ant bear cat}.one?(/b/))
+ assert(!(%w{ant bear cat}.one?(/t/)))
assert(!([ nil, true, 99 ].one?))
assert([ nil, true, false ].one?)
+ assert(![].one?)
+ assert(!@empty.one?)
+ assert([ nil, true, 99 ].one?(Integer))
+ end
+
+ def test_one_with_unused_block
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ [1, 2].one?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ (1..2).one?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ 3.times.one?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ {a: 1, b: 2}.one?([:b, 2]) {|x| x == 4 }
+ EOS
end
def test_none
assert(@obj.none? {|x| x == 4 })
assert(!(@obj.none? {|x| x == 1 }))
assert(!(@obj.none? {|x| x == 3 }))
+ assert(@obj.none?(4..5))
+ assert(!(@obj.none?(1..3)))
assert(%w{ant bear cat}.none? {|word| word.length == 5})
assert(!(%w{ant bear cat}.none? {|word| word.length >= 4}))
+ assert(%w{ant bear cat}.none?(/d/))
+ assert(!(%w{ant bear cat}.none?(/b/)))
assert([].none?)
assert([nil].none?)
assert([nil,false].none?)
+ assert(![nil,false,true].none?)
+ assert(@empty.none?)
+ end
+
+ def test_none_with_unused_block
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ [1, 2].none?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ (1..2).none?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ 3.times.none?(1) {|x| x == 3 }
+ EOS
+ assert_in_out_err [], <<-EOS, [], ["-:1: warning: given block not used"]
+ {a: 1, b: 2}.none?([:b, 2]) {|x| x == 4 }
+ EOS
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)
+ cond = ->((a, ia), (b, ib)) { (b <=> a).nonzero? or ia <=> ib }
+ assert_equal([3, 2], @obj.each_with_index.min(&cond))
+ enum = %w(albatross dog horse).to_enum
+ assert_equal("albatross", enum.min)
+ assert_equal("dog", enum.min {|a,b| a.length <=> b.length })
+ assert_equal(1, [3,2,1].to_enum.min)
+ assert_equal(%w[albatross dog], enum.min(2))
+ assert_equal(%w[dog horse],
+ enum.min(2) {|a,b| a.length <=> b.length })
+ assert_equal([13, 14], [20, 32, 32, 21, 30, 25, 29, 13, 14].to_enum.min(2))
+ assert_equal([2, 4, 6, 7], [2, 4, 8, 6, 7].to_enum.min(4))
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 })
+ cond = ->((a, ia), (b, ib)) { (b <=> a).nonzero? or ia <=> ib }
+ assert_equal([1, 3], @obj.each_with_index.max(&cond))
+ enum = %w(albatross dog horse).to_enum
+ assert_equal("horse", enum.max)
+ assert_equal("albatross", enum.max {|a,b| a.length <=> b.length })
+ assert_equal(1, [3,2,1].to_enum.max{|a,b| b <=> a })
+ assert_equal(%w[horse dog], enum.max(2))
+ assert_equal(%w[albatross horse],
+ enum.max(2) {|a,b| a.length <=> b.length })
+ assert_equal([3, 2], [0, 0, 0, 0, 0, 0, 1, 3, 2].to_enum.max(2))
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 })
+ ary = %w(albatross dog horse)
+ assert_equal(["albatross", "horse"], ary.minmax)
+ assert_equal(["dog", "albatross"], ary.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 })
+ assert_equal([1, 3], [2,2,3,3,1,1].minmax)
+ assert_equal([nil, nil], [].minmax)
end
def test_min_by
assert_equal(3, @obj.min_by {|x| -x })
+ cond = ->(x, i) { -x }
+ assert_equal([3, 2], @obj.each_with_index.min_by(&cond))
a = %w(albatross dog horse)
assert_equal("dog", a.min_by {|x| x.length })
assert_equal(3, [2,3,1].min_by {|x| -x })
+ assert_equal(%w[dog horse], a.min_by(2) {|x| x.length })
+ assert_equal([13, 14], [20, 32, 32, 21, 30, 25, 29, 13, 14].min_by(2) {|x| x})
end
def test_max_by
assert_equal(1, @obj.max_by {|x| -x })
+ cond = ->(x, i) { -x }
+ assert_equal([1, 0], @obj.each_with_index.max_by(&cond))
a = %w(albatross dog horse)
assert_equal("albatross", a.max_by {|x| x.length })
assert_equal(1, [2,3,1].max_by {|x| -x })
+ assert_equal(%w[albatross horse], a.max_by(2) {|x| x.length })
+ assert_equal([3, 2], [0, 0, 0, 0, 0, 0, 1, 3, 2].max_by(2) {|x| x})
end
def test_minmax_by
assert_equal([3, 1], @obj.minmax_by {|x| -x })
+ cond = ->(x, i) { -x }
+ assert_equal([[3, 2], [1, 0]], @obj.each_with_index.minmax_by(&cond))
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 })
@@ -196,6 +692,14 @@ class TestEnumerable < Test::Unit::TestCase
assert(!([1,2,3].member?(4)))
end
+ class Foo
+ include Enumerable
+ def each
+ yield 1
+ yield 1,2
+ end
+ end
+
def test_each_with_index
a = []
@obj.each_with_index {|x, i| a << [x, i] }
@@ -206,6 +710,7 @@ class TestEnumerable < Test::Unit::TestCase
hash[item] = index
end
assert_equal({"cat"=>0, "wombat"=>2, "dog"=>1}, hash)
+ assert_equal([[1, 0], [[1, 2], 1]], Foo.new.each_with_index.to_a)
end
def test_each_with_object
@@ -216,25 +721,89 @@ class TestEnumerable < Test::Unit::TestCase
}
assert_same(obj, ret)
assert_equal([55, 3628800], ret)
+ assert_equal([[1, nil], [[1, 2], nil]], Foo.new.each_with_object(nil).to_a)
+ end
+
+ def test_each_entry
+ assert_equal([1, 2, 3], [1, 2, 3].each_entry.to_a)
+ assert_equal([1, [1, 2]], Foo.new.each_entry.to_a)
+ a = []
+ cond = ->(x, i) { a << x }
+ @obj.each_with_index.each_entry(&cond)
+ assert_equal([1, 2, 3, 1, 2], a)
+ end
+
+ def test_each_slice
+ ary = []
+ (1..10).each_slice(3) {|a| ary << a}
+ assert_equal([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]], ary)
+
+ bug9749 = '[ruby-core:62060] [Bug #9749]'
+ ary.clear
+ (1..10).each_slice(3, &lambda {|a, *| ary << a})
+ assert_equal([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]], ary, bug9749)
+
+ ary.clear
+ (1..10).each_slice(10) {|a| ary << a}
+ assert_equal([[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]], ary)
+
+ ary.clear
+ (1..10).each_slice(11) {|a| ary << a}
+ assert_equal([[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]], ary)
+
+ assert_equal(1..10, (1..10).each_slice(3) { })
+ assert_equal([], [].each_slice(3) { })
+ end
+
+ def test_each_cons
+ ary = []
+ (1..5).each_cons(3) {|a| ary << a}
+ assert_equal([[1, 2, 3], [2, 3, 4], [3, 4, 5]], ary)
+
+ bug9749 = '[ruby-core:62060] [Bug #9749]'
+ ary.clear
+ (1..5).each_cons(3, &lambda {|a, *| ary << a})
+ assert_equal([[1, 2, 3], [2, 3, 4], [3, 4, 5]], ary, bug9749)
+
+ ary.clear
+ (1..5).each_cons(5) {|a| ary << a}
+ assert_equal([[1, 2, 3, 4, 5]], ary)
+
+ ary.clear
+ (1..5).each_cons(6) {|a| ary << a}
+ assert_empty(ary)
+
+ assert_equal(1..5, (1..5).each_cons(3) { })
+ assert_equal([], [].each_cons(3) { })
end
def test_zip
assert_equal([[1,1],[2,2],[3,3],[1,1],[2,2]], @obj.zip(@obj))
+ assert_equal([["a",1],["b",2],["c",3]], ["a", "b", "c"].zip(@obj))
+
a = []
- @obj.zip([:a, :b, :c]) {|x,y| a << [x, y] }
+ result = @obj.zip([:a, :b, :c]) {|x,y| a << [x, y] }
+ assert_nil result
assert_equal([[1,:a],[2,:b],[3,:c],[1,nil],[2,nil]], a)
a = []
+ cond = ->((x, i), y) { a << [x, y, i] }
+ @obj.each_with_index.zip([:a, :b, :c], &cond)
+ assert_equal([[1,:a,0],[2,:b,1],[3,:c,2],[1,nil,3],[2,nil,4]], a)
+
+ a = []
@obj.zip({a: "A", b: "B", c: "C"}) {|x,y| a << [x, y] }
assert_equal([[1,[:a,"A"]],[2,[:b,"B"]],[3,[:c,"C"]],[1,nil],[2,nil]], a)
ary = Object.new
def ary.to_a; [1, 2]; end
- assert_raise(NoMethodError){ %w(a b).zip(ary) }
+ assert_raise(TypeError) {%w(a b).zip(ary)}
def ary.each; [3, 4].each{|e|yield e}; end
assert_equal([[1, 3], [2, 4], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
def ary.to_ary; [5, 6]; end
assert_equal([[1, 5], [2, 6], [3, nil], [1, nil], [2, nil]], @obj.zip(ary))
+ obj = eval("class C\u{1f5ff}; self; end").new
+ assert_raise_with_message(TypeError, /C\u{1f5ff}/) {(1..1).zip(obj)}
end
def test_take
@@ -243,6 +812,13 @@ class TestEnumerable < Test::Unit::TestCase
def test_take_while
assert_equal([1,2], @obj.take_while {|x| x <= 2})
+ cond = ->(x, i) {x <= 2}
+ assert_equal([[1, 0], [2, 1]], @obj.each_with_index.take_while(&cond))
+
+ bug5801 = '[ruby-dev:45040]'
+ @empty.take_while {true}
+ block = @empty.block
+ assert_nothing_raised(bug5801) {100.times {block.call}}
end
def test_drop
@@ -251,13 +827,24 @@ class TestEnumerable < Test::Unit::TestCase
def test_drop_while
assert_equal([3,1,2], @obj.drop_while {|x| x <= 2})
+ cond = ->(x, i) {x <= 2}
+ assert_equal([[3, 2], [1, 3], [2, 4]], @obj.each_with_index.drop_while(&cond))
end
def test_cycle
assert_equal([1,2,3,1,2,1,2,3,1,2], @obj.cycle.take(10))
+ a = []
+ @obj.cycle(2) {|x| a << x}
+ assert_equal([1,2,3,1,2,1,2,3,1,2], a)
+ a = []
+ cond = ->(x, i) {a << x}
+ @obj.each_with_index.cycle(2, &cond)
+ assert_equal([1,2,3,1,2,1,2,3,1,2], a)
end
def test_callcc
+ omit 'requires callcc support' unless respond_to?(:callcc)
+
assert_raise(RuntimeError) do
c = nil
@obj.sort_by {|x| callcc {|c2| c ||= c2 }; x }
@@ -289,42 +876,39 @@ class TestEnumerable < Test::Unit::TestCase
[o, o, o].sort_by {|x| x }
c.call
end
+
+ assert_raise_with_message(RuntimeError, /reentered/) do
+ i = 0
+ c = nil
+ o = Object.new
+ class << o; self; end.class_eval do
+ define_method(:<=>) do |x|
+ callcc {|c2| c ||= c2 }
+ i += 1
+ 0
+ end
+ end
+ [o, o].min(1)
+ assert_operator(i, :<=, 5, "infinite loop")
+ c.call
+ end
end
def test_reverse_each
assert_equal([2,1,3,2,1], @obj.reverse_each.to_a)
end
- def test_join
- ofs = $,
- assert_equal("abc", ("a".."c").join(""))
- assert_equal("a-b-c", ("a".."c").join("-"))
- $, = "-"
- assert_equal("a-b-c", ("a".."c").join())
- $, = nil
- assert_equal("abc", ("a".."c").join())
- assert_equal("123", (1..3).join())
- assert_raise(TypeError, '[ruby-core:24172]') {("a".."c").join(1)}
- class << (e = Object.new.extend(Enumerable))
- def each
- yield self
- end
- end
- assert_raise(ArgumentError){e.join("")}
- assert_raise(ArgumentError){[e].join("")}
- e = Class.new {
- include Enumerable
- def initialize(*args)
- @e = args
- end
- def each
- @e.each {|e| yield e}
+ def test_reverse_each_memory_corruption
+ bug16354 = '[ruby-dev:50867]'
+ assert_normal_exit %q{
+ size = 1000
+ (0...size).reverse_each do |i|
+ i.inspect
+ ObjectSpace.each_object(Array) do |a|
+ a.clear if a.length == size
+ end
end
- }
- e = e.new(1, e.new(2, e.new(3, e.new(4, 5))))
- assert_equal("1:2:3:4:5", e.join(':'), '[ruby-core:24196]')
- ensure
- $, = ofs
+ }, bug16354
end
def test_chunk
@@ -334,22 +918,6 @@ class TestEnumerable < Test::Unit::TestCase
e = @obj.chunk {|elt| elt & 2 == 0 ? false : true }
assert_equal([[false, [1]], [true, [2, 3]], [false, [1]], [true, [2]]], e.to_a)
- e = @obj.chunk(acc: 0) {|elt, h| h[:acc] += elt; h[:acc].even? }
- assert_equal([[false, [1,2]], [true, [3]], [false, [1,2]]], e.to_a)
- assert_equal([[false, [1,2]], [true, [3]], [false, [1,2]]], e.to_a) # this tests h is duplicated.
-
- hs = [{}]
- e = [:foo].chunk(hs[0]) {|elt, h|
- hs << h
- true
- }
- assert_equal([[true, [:foo]]], e.to_a)
- assert_equal([[true, [:foo]]], e.to_a)
- assert_equal([{}, {}, {}], hs)
- assert_not_same(hs[0], hs[1])
- assert_not_same(hs[0], hs[2])
- assert_not_same(hs[1], hs[2])
-
e = @obj.chunk {|elt| elt < 3 ? :_alone : true }
assert_equal([[:_alone, [1]],
[:_alone, [2]],
@@ -367,6 +935,12 @@ class TestEnumerable < Test::Unit::TestCase
e = @obj.chunk {|elt| :_foo }
assert_raise(RuntimeError) { e.to_a }
+
+ e = @obj.chunk.with_index {|elt, i| elt - i }
+ assert_equal([[1, [1, 2, 3]],
+ [-2, [1, 2]]], e.to_a)
+
+ assert_equal(4, (0..3).chunk.size)
end
def test_slice_before
@@ -379,25 +953,407 @@ class TestEnumerable < Test::Unit::TestCase
e = @obj.slice_before {|elt| elt.odd? }
assert_equal([[1,2], [3], [1,2]], e.to_a)
- e = @obj.slice_before(acc: 0) {|elt, h| h[:acc] += elt; h[:acc].even? }
- assert_equal([[1,2], [3,1,2]], e.to_a)
- assert_equal([[1,2], [3,1,2]], e.to_a) # this tests h is duplicated.
+ ss = %w[abc defg h ijk l mno pqr st u vw xy z]
+ assert_equal([%w[abc defg h], %w[ijk l], %w[mno], %w[pqr st u vw xy z]],
+ ss.slice_before(/\A...\z/).to_a)
+ assert_warning("") {ss.slice_before(/\A...\z/).to_a}
+ end
+
+ def test_slice_after0
+ assert_raise(ArgumentError) { [].slice_after }
+ end
+
+ def test_slice_after1
+ e = [].slice_after {|a| flunk "should not be called" }
+ assert_equal([], e.to_a)
+
+ e = [1,2].slice_after(1)
+ assert_equal([[1], [2]], e.to_a)
+
+ e = [1,2].slice_after(3)
+ assert_equal([[1, 2]], e.to_a)
+
+ [true, false].each {|b|
+ block_results = [true, b]
+ e = [1,2].slice_after {|a| block_results.shift }
+ assert_equal([[1], [2]], e.to_a)
+ assert_equal([], block_results)
+
+ block_results = [false, b]
+ e = [1,2].slice_after {|a| block_results.shift }
+ assert_equal([[1, 2]], e.to_a)
+ assert_equal([], block_results)
+ }
+ end
+
+ def test_slice_after_both_pattern_and_block
+ assert_raise(ArgumentError) { [].slice_after(1) {|a| true } }
+ end
- hs = [{}]
- e = [:foo].slice_before(hs[0]) {|elt, h|
- hs << h
+ def test_slice_after_continuation_lines
+ lines = ["foo\n", "bar\\\n", "baz\n", "\n", "qux\n"]
+ e = lines.slice_after(/[^\\]\n\z/)
+ assert_equal([["foo\n"], ["bar\\\n", "baz\n"], ["\n", "qux\n"]], e.to_a)
+ end
+
+ def test_slice_before_empty_line
+ lines = ["foo", "", "bar"]
+ e = lines.slice_after(/\A\s*\z/)
+ assert_equal([["foo", ""], ["bar"]], e.to_a)
+ end
+
+ def test_slice_when_0
+ e = [].slice_when {|a, b| flunk "should not be called" }
+ assert_equal([], e.to_a)
+ end
+
+ def test_slice_when_1
+ e = [1].slice_when {|a, b| flunk "should not be called" }
+ assert_equal([[1]], e.to_a)
+ end
+
+ def test_slice_when_2
+ e = [1,2].slice_when {|a,b|
+ assert_equal(1, a)
+ assert_equal(2, b)
true
}
- assert_equal([[:foo]], e.to_a)
- assert_equal([[:foo]], e.to_a)
- assert_equal([{}, {}, {}], hs)
- assert_not_same(hs[0], hs[1])
- assert_not_same(hs[0], hs[2])
- assert_not_same(hs[1], hs[2])
+ assert_equal([[1], [2]], e.to_a)
- ss = %w[abc defg h ijk l mno pqr st u vw xy z]
- assert_equal([%w[abc defg h], %w[ijk l], %w[mno], %w[pqr st u vw xy z]],
- ss.slice_before(/\A...\z/).to_a)
+ e = [1,2].slice_when {|a,b|
+ assert_equal(1, a)
+ assert_equal(2, b)
+ false
+ }
+ assert_equal([[1, 2]], e.to_a)
+ end
+
+ def test_slice_when_3
+ block_invocations = [
+ lambda {|a, b|
+ assert_equal(1, a)
+ assert_equal(2, b)
+ true
+ },
+ lambda {|a, b|
+ assert_equal(2, a)
+ assert_equal(3, b)
+ false
+ }
+ ]
+ e = [1,2,3].slice_when {|a,b|
+ block_invocations.shift.call(a, b)
+ }
+ assert_equal([[1], [2, 3]], e.to_a)
+ assert_equal([], block_invocations)
+ end
+
+ def test_slice_when_noblock
+ assert_raise(ArgumentError) { [].slice_when }
+ end
+
+ def test_slice_when_contiguously_increasing_integers
+ e = [1,4,9,10,11,12,15,16,19,20,21].slice_when {|i, j| i+1 != j }
+ assert_equal([[1], [4], [9,10,11,12], [15,16], [19,20,21]], e.to_a)
+ end
+
+ def test_chunk_while_contiguously_increasing_integers
+ e = [1,4,9,10,11,12,15,16,19,20,21].chunk_while {|i, j| i+1 == j }
+ assert_equal([[1], [4], [9,10,11,12], [15,16], [19,20,21]], e.to_a)
+ end
+
+ def test_detect
+ @obj = ('a'..'z')
+ assert_equal('c', @obj.detect {|x| x == 'c' })
+
+ proc = Proc.new {|x| x == 'c' }
+ assert_equal('c', @obj.detect(&proc))
+
+ lambda = ->(x) { x == 'c' }
+ assert_equal('c', @obj.detect(&lambda))
+
+ assert_equal(['c',2], @obj.each_with_index.detect {|x, i| x == 'c' })
+
+ proc2 = Proc.new {|x, i| x == 'c' }
+ assert_equal(['c',2], @obj.each_with_index.detect(&proc2))
+
+ bug9605 = '[ruby-core:61340]'
+ lambda2 = ->(x, i) { x == 'c' }
+ assert_equal(['c',2], @obj.each_with_index.detect(&lambda2), bug9605)
end
+ def test_select
+ @obj = ('a'..'z')
+ assert_equal(['c'], @obj.select {|x| x == 'c' })
+
+ proc = Proc.new {|x| x == 'c' }
+ assert_equal(['c'], @obj.select(&proc))
+
+ lambda = ->(x) { x == 'c' }
+ assert_equal(['c'], @obj.select(&lambda))
+
+ assert_equal([['c',2]], @obj.each_with_index.select {|x, i| x == 'c' })
+
+ proc2 = Proc.new {|x, i| x == 'c' }
+ assert_equal([['c',2]], @obj.each_with_index.select(&proc2))
+
+ bug9605 = '[ruby-core:61340]'
+ lambda2 = ->(x, i) { x == 'c' }
+ assert_equal([['c',2]], @obj.each_with_index.select(&lambda2), bug9605)
+ end
+
+ def test_map
+ @obj = ('a'..'e')
+ assert_equal(['A', 'B', 'C', 'D', 'E'], @obj.map {|x| x.upcase })
+
+ proc = Proc.new {|x| x.upcase }
+ assert_equal(['A', 'B', 'C', 'D', 'E'], @obj.map(&proc))
+
+ lambda = ->(x) { x.upcase }
+ assert_equal(['A', 'B', 'C', 'D', 'E'], @obj.map(&lambda))
+
+ assert_equal([['A',0], ['B',1], ['C',2], ['D',3], ['E',4]],
+ @obj.each_with_index.map {|x, i| [x.upcase, i] })
+
+ proc2 = Proc.new {|x, i| [x.upcase, i] }
+ assert_equal([['A',0], ['B',1], ['C',2], ['D',3], ['E',4]],
+ @obj.each_with_index.map(&proc2))
+
+ lambda2 = ->(x, i) { [x.upcase, i] }
+ assert_equal([['A',0], ['B',1], ['C',2], ['D',3], ['E',4]],
+ @obj.each_with_index.map(&lambda2))
+
+ hash = { a: 'hoge', b: 'fuga' }
+ lambda = -> (k, v) { "#{k}:#{v}" }
+ assert_equal ["a:hoge", "b:fuga"], hash.map(&lambda)
+ end
+
+ def test_flat_map
+ @obj = [[1,2], [3,4]]
+ assert_equal([2,4,6,8], @obj.flat_map {|i| i.map{|j| j*2} })
+
+ proc = Proc.new {|i| i.map{|j| j*2} }
+ assert_equal([2,4,6,8], @obj.flat_map(&proc))
+
+ lambda = ->(i) { i.map{|j| j*2} }
+ assert_equal([2,4,6,8], @obj.flat_map(&lambda))
+
+ assert_equal([[1,2],0,[3,4],1],
+ @obj.each_with_index.flat_map {|x, i| [x,i] })
+
+ proc2 = Proc.new {|x, i| [x,i] }
+ assert_equal([[1,2],0,[3,4],1],
+ @obj.each_with_index.flat_map(&proc2))
+
+ lambda2 = ->(x, i) { [x,i] }
+ assert_equal([[1,2],0,[3,4],1],
+ @obj.each_with_index.flat_map(&lambda2))
+ end
+
+ def assert_typed_equal(e, v, cls, msg=nil)
+ assert_kind_of(cls, v, msg)
+ assert_equal(e, v, msg)
+ end
+
+ def assert_int_equal(e, v, msg=nil)
+ assert_typed_equal(e, v, Integer, msg)
+ end
+
+ def assert_rational_equal(e, v, msg=nil)
+ assert_typed_equal(e, v, Rational, msg)
+ end
+
+ def assert_float_equal(e, v, msg=nil)
+ assert_typed_equal(e, v, Float, msg)
+ end
+
+ def assert_complex_equal(e, v, msg=nil)
+ assert_typed_equal(e, v, Complex, msg)
+ end
+
+ def test_sum
+ class << (enum = Object.new)
+ include Enumerable
+ def each
+ yield 3
+ yield 5
+ yield 7
+ end
+ end
+ assert_int_equal(15, enum.sum)
+
+ assert_int_equal(0, [].each.sum)
+ assert_int_equal(3, [3].each.sum)
+ assert_int_equal(8, [3, 5].each.sum)
+ assert_int_equal(15, [3, 5, 7].each.sum)
+ assert_rational_equal(8r, [3, 5r].each.sum)
+ assert_float_equal(15.0, [3, 5, 7.0].each.sum)
+ assert_float_equal(15.0, [3, 5r, 7.0].each.sum)
+ assert_complex_equal(8r + 1i, [3, 5r, 1i].each.sum)
+ assert_complex_equal(15.0 + 1i, [3, 5r, 7.0, 1i].each.sum)
+
+ assert_int_equal(2*FIXNUM_MAX, Array.new(2, FIXNUM_MAX).each.sum)
+ assert_int_equal(2*(FIXNUM_MAX+1), Array.new(2, FIXNUM_MAX+1).each.sum)
+ assert_int_equal(10*FIXNUM_MAX, Array.new(10, FIXNUM_MAX).each.sum)
+ assert_int_equal(0, ([FIXNUM_MAX, 1, -FIXNUM_MAX, -1]*10).each.sum)
+ assert_int_equal(FIXNUM_MAX*10, ([FIXNUM_MAX+1, -1]*10).each.sum)
+ assert_int_equal(2*FIXNUM_MIN, Array.new(2, FIXNUM_MIN).each.sum)
+
+ assert_float_equal(0.0, [].each.sum(0.0))
+ assert_float_equal(3.0, [3].each.sum(0.0))
+ assert_float_equal(3.5, [3].each.sum(0.5))
+ assert_float_equal(8.5, [3.5, 5].each.sum)
+ assert_float_equal(10.5, [2, 8.5].each.sum)
+ assert_float_equal((FIXNUM_MAX+1).to_f, [FIXNUM_MAX, 1, 0.0].each.sum)
+ assert_float_equal((FIXNUM_MAX+1).to_f, [0.0, FIXNUM_MAX+1].each.sum)
+
+ assert_rational_equal(3/2r, [1/2r, 1].each.sum)
+ assert_rational_equal(5/6r, [1/2r, 1/3r].each.sum)
+
+ assert_equal(2.0+3.0i, [2.0, 3.0i].each.sum)
+
+ assert_int_equal(13, [1, 2].each.sum(10))
+ assert_int_equal(16, [1, 2].each.sum(10) {|v| v * 2 })
+
+ yielded = []
+ three = SimpleDelegator.new(3)
+ ary = [1, 2.0, three]
+ assert_float_equal(12.0, ary.each.sum {|x| yielded << x; x * 2 })
+ assert_equal(ary, yielded)
+
+ assert_raise(TypeError) { [Object.new].each.sum }
+
+ large_number = 100000000
+ small_number = 1e-9
+ until (large_number + small_number) == large_number
+ small_number /= 10
+ end
+ assert_float_equal(large_number+(small_number*10), [large_number, *[small_number]*10].each.sum)
+ assert_float_equal(large_number+(small_number*10), [large_number/1r, *[small_number]*10].each.sum)
+ assert_float_equal(large_number+(small_number*11), [small_number, large_number/1r, *[small_number]*10].each.sum)
+ assert_float_equal(small_number, [large_number, small_number, -large_number].each.sum)
+
+ k = Class.new do
+ include Enumerable
+ def initialize(*values)
+ @values = values
+ end
+ def each(&block)
+ @values.each(&block)
+ end
+ end
+ assert_equal(+Float::INFINITY, k.new(0.0, +Float::INFINITY).sum)
+ assert_equal(+Float::INFINITY, k.new(+Float::INFINITY, 0.0).sum)
+ assert_equal(-Float::INFINITY, k.new(0.0, -Float::INFINITY).sum)
+ assert_equal(-Float::INFINITY, k.new(-Float::INFINITY, 0.0).sum)
+ assert_predicate(k.new(-Float::INFINITY, Float::INFINITY).sum, :nan?)
+
+ assert_equal("abc", ["a", "b", "c"].each.sum(""))
+ assert_equal([1, [2], 3], [[1], [[2]], [3]].each.sum([]))
+ end
+
+ def test_hash_sum
+ histogram = { 1 => 6, 2 => 4, 3 => 3, 4 => 7, 5 => 5, 6 => 4 }
+ assert_equal(100, histogram.sum {|v, n| v * n })
+ end
+
+ def test_range_sum
+ assert_int_equal(55, (1..10).sum)
+ assert_float_equal(55.0, (1..10).sum(0.0))
+ assert_int_equal(90, (5..10).sum {|v| v * 2 })
+ assert_float_equal(90.0, (5..10).sum(0.0) {|v| v * 2 })
+ assert_int_equal(0, (2..0).sum)
+ assert_int_equal(5, (2..0).sum(5))
+ assert_int_equal(2, (2..2).sum)
+ assert_int_equal(42, (2...2).sum(42))
+
+ not_a_range = Class.new do
+ include Enumerable # Defines the `#sum` method
+ def each
+ yield 2
+ yield 4
+ yield 6
+ end
+
+ def begin; end
+ def end; end
+ end
+ assert_equal(12, not_a_range.new.sum)
+ end
+
+ def test_uniq
+ src = [1, 1, 1, 1, 2, 2, 3, 4, 5, 6]
+ assert_equal([1, 2, 3, 4, 5, 6], src.uniq.to_a)
+ olympics = {
+ 1896 => 'Athens',
+ 1900 => 'Paris',
+ 1904 => 'Chicago',
+ 1906 => 'Athens',
+ 1908 => 'Rome',
+ }
+ assert_equal([[1896, "Athens"], [1900, "Paris"], [1904, "Chicago"], [1908, "Rome"]],
+ olympics.uniq{|k,v| v})
+ assert_equal([1, 2, 3, 4, 5, 10], (1..100).uniq{|x| (x**2) % 10 }.first(6))
+ assert_equal([1, [1, 2]], Foo.new.to_enum.uniq)
+ end
+
+ def test_compact
+ class << (enum = Object.new)
+ include Enumerable
+ def each
+ yield 3
+ yield nil
+ yield 7
+ yield 9
+ yield nil
+ end
+ end
+
+ assert_equal([3, 7, 9], enum.compact)
+ end
+
+ def test_transient_heap_sort_by
+ klass = Class.new do
+ include Comparable
+ attr_reader :i
+ def initialize e
+ @i = e
+ end
+ def <=> other
+ GC.start
+ i <=> other.i
+ end
+ end
+ assert_equal [1, 2, 3, 4, 5], (1..5).sort_by{|e| klass.new e}
+ end
+
+ def test_filter_map
+ @obj = (1..8).to_a
+ assert_equal([4, 8, 12, 16], @obj.filter_map { |i| i * 2 if i.even? })
+ assert_equal([2, 4, 6, 8, 10, 12, 14, 16], @obj.filter_map { |i| i * 2 })
+ assert_equal([0, 0, 0, 0, 0, 0, 0, 0], @obj.filter_map { 0 })
+ assert_equal([], @obj.filter_map { false })
+ assert_equal([], @obj.filter_map { nil })
+ assert_instance_of(Enumerator, @obj.filter_map)
+ end
+
+ def test_ruby_svar
+ klass = Class.new do
+ include Enumerable
+ def each
+ %w(bar baz).each{|e| yield e}
+ end
+ end
+ svars = []
+ klass.new.grep(/(b.)/) { svars << $1 }
+ assert_equal(["ba", "ba"], svars)
+ end
+
+ def test_all_fast
+ data = { "key" => { "key2" => 1 } }
+ kk = vv = nil
+ data.all? { |(k, v)| kk, vv = k, v }
+ assert_equal(kk, "key")
+ assert_equal(vv, { "key2" => 1 })
+ end
end
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