2015-12-16 00:07:31 -05:00
|
|
|
# frozen_string_literal: false
|
2007-11-15 20:30:29 -05:00
|
|
|
require 'test/unit'
|
|
|
|
|
|
|
|
class TestEnumerator < Test::Unit::TestCase
|
2008-01-29 08:59:13 -05:00
|
|
|
def setup
|
|
|
|
@obj = Object.new
|
|
|
|
class << @obj
|
|
|
|
include Enumerable
|
|
|
|
def foo(*a)
|
|
|
|
a.each {|x| yield x }
|
|
|
|
end
|
|
|
|
end
|
2012-11-06 12:12:35 -05:00
|
|
|
@sized = @obj.clone
|
|
|
|
def @sized.size
|
|
|
|
42
|
|
|
|
end
|
2008-01-29 08:59:13 -05:00
|
|
|
end
|
|
|
|
|
2007-11-15 20:30:29 -05:00
|
|
|
def enum_test obj
|
|
|
|
obj.map{|e|
|
|
|
|
e
|
|
|
|
}.sort
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_iterators
|
|
|
|
assert_equal [0, 1, 2], enum_test(3.times)
|
|
|
|
assert_equal [:x, :y, :z], enum_test([:x, :y, :z].each)
|
2014-03-09 21:51:45 -04:00
|
|
|
assert_equal [[:x, 1], [:y, 2]], enum_test({:x=>1, :y=>2}.each)
|
2007-11-15 20:30:29 -05:00
|
|
|
end
|
|
|
|
|
|
|
|
## Enumerator as Iterator
|
|
|
|
|
|
|
|
def test_next
|
|
|
|
e = 3.times
|
|
|
|
3.times{|i|
|
|
|
|
assert_equal i, e.next
|
|
|
|
}
|
|
|
|
assert_raise(StopIteration){e.next}
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_loop
|
|
|
|
e = 3.times
|
|
|
|
i = 0
|
|
|
|
loop{
|
|
|
|
assert_equal(i, e.next)
|
|
|
|
i += 1
|
|
|
|
}
|
|
|
|
end
|
|
|
|
|
2015-10-22 05:58:01 -04:00
|
|
|
def test_loop_return_value
|
|
|
|
assert_equal nil, loop { break }
|
|
|
|
assert_equal 42, loop { break 42 }
|
|
|
|
|
|
|
|
e = Enumerator.new { |y| y << 1; y << 2; :stopped }
|
|
|
|
assert_equal :stopped, loop { e.next while true }
|
|
|
|
end
|
|
|
|
|
2012-01-10 02:13:04 -05:00
|
|
|
def test_nested_iteration
|
2007-11-15 20:30:29 -05:00
|
|
|
def (o = Object.new).each
|
|
|
|
yield :ok1
|
|
|
|
yield [:ok2, :x].each.next
|
|
|
|
end
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal :ok1, e.next
|
|
|
|
assert_equal :ok2, e.next
|
|
|
|
assert_raise(StopIteration){e.next}
|
|
|
|
end
|
2008-01-29 08:59:13 -05:00
|
|
|
|
|
|
|
|
|
|
|
def test_initialize
|
|
|
|
assert_equal([1, 2, 3], @obj.to_enum(:foo, 1, 2, 3).to_a)
|
2020-08-12 22:44:15 -04:00
|
|
|
assert_raise(ArgumentError) {
|
|
|
|
Enumerator.new(@obj, :foo, 1, 2, 3)
|
|
|
|
}
|
2008-08-26 01:42:12 -04:00
|
|
|
assert_equal([1, 2, 3], Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.take(3))
|
2008-08-13 04:03:30 -04:00
|
|
|
assert_raise(ArgumentError) { Enumerator.new }
|
2013-07-29 08:06:39 -04:00
|
|
|
|
|
|
|
enum = @obj.to_enum
|
|
|
|
assert_raise(NoMethodError) { enum.each {} }
|
|
|
|
enum.freeze
|
2020-08-12 22:44:15 -04:00
|
|
|
assert_raise(ArgumentError) {
|
2021-09-13 08:14:42 -04:00
|
|
|
capture_output do
|
2013-07-29 08:06:39 -04:00
|
|
|
# warning: Enumerator.new without a block is deprecated; use Object#to_enum
|
|
|
|
enum.__send__(:initialize, @obj, :foo)
|
|
|
|
end
|
|
|
|
}
|
2008-01-29 08:59:13 -05:00
|
|
|
end
|
|
|
|
|
|
|
|
def test_initialize_copy
|
|
|
|
assert_equal([1, 2, 3], @obj.to_enum(:foo, 1, 2, 3).dup.to_a)
|
|
|
|
e = @obj.to_enum(:foo, 1, 2, 3)
|
|
|
|
assert_nothing_raised { assert_equal(1, e.next) }
|
|
|
|
assert_raise(TypeError) { e.dup }
|
2008-08-26 01:42:12 -04:00
|
|
|
|
|
|
|
e = Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.dup
|
|
|
|
assert_nothing_raised { assert_equal(1, e.next) }
|
|
|
|
assert_raise(TypeError) { e.dup }
|
2008-01-29 08:59:13 -05:00
|
|
|
end
|
|
|
|
|
|
|
|
def test_gc
|
|
|
|
assert_nothing_raised do
|
|
|
|
1.times do
|
|
|
|
foo = [1,2,3].to_enum
|
|
|
|
GC.start
|
2016-02-19 02:48:02 -05:00
|
|
|
foo
|
2008-01-29 08:59:13 -05:00
|
|
|
end
|
|
|
|
GC.start
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_slice
|
|
|
|
assert_equal([[1,2,3],[4,5,6],[7,8,9],[10]], (1..10).each_slice(3).to_a)
|
|
|
|
end
|
|
|
|
|
2019-06-02 23:00:35 -04:00
|
|
|
def test_each_slice_size
|
|
|
|
assert_equal(4, (1..10).each_slice(3).size)
|
|
|
|
assert_equal(Float::INFINITY, 1.step.each_slice(3).size)
|
|
|
|
end
|
|
|
|
|
2008-01-29 08:59:13 -05:00
|
|
|
def test_cons
|
|
|
|
a = [[1,2,3], [2,3,4], [3,4,5], [4,5,6], [5,6,7], [6,7,8], [7,8,9], [8,9,10]]
|
|
|
|
assert_equal(a, (1..10).each_cons(3).to_a)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_with_index
|
|
|
|
assert_equal([[1,0],[2,1],[3,2]], @obj.to_enum(:foo, 1, 2, 3).with_index.to_a)
|
2009-02-08 09:42:01 -05:00
|
|
|
assert_equal([[1,5],[2,6],[3,7]], @obj.to_enum(:foo, 1, 2, 3).with_index(5).to_a)
|
2008-01-29 08:59:13 -05:00
|
|
|
end
|
|
|
|
|
2013-03-04 20:20:20 -05:00
|
|
|
def test_with_index_large_offset
|
|
|
|
bug8010 = '[ruby-dev:47131] [Bug #8010]'
|
|
|
|
s = 1 << (8*1.size-2)
|
|
|
|
assert_equal([[1,s],[2,s+1],[3,s+2]], @obj.to_enum(:foo, 1, 2, 3).with_index(s).to_a, bug8010)
|
|
|
|
s <<= 1
|
|
|
|
assert_equal([[1,s],[2,s+1],[3,s+2]], @obj.to_enum(:foo, 1, 2, 3).with_index(s).to_a, bug8010)
|
|
|
|
end
|
|
|
|
|
2013-03-11 05:47:15 -04:00
|
|
|
def test_with_index_nonnum_offset
|
|
|
|
bug8010 = '[ruby-dev:47131] [Bug #8010]'
|
|
|
|
s = Object.new
|
|
|
|
def s.to_int; 1 end
|
|
|
|
assert_equal([[1,1],[2,2],[3,3]], @obj.to_enum(:foo, 1, 2, 3).with_index(s).to_a, bug8010)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_with_index_string_offset
|
|
|
|
bug8010 = '[ruby-dev:47131] [Bug #8010]'
|
|
|
|
assert_raise(TypeError, bug8010){ @obj.to_enum(:foo, 1, 2, 3).with_index('1').to_a }
|
|
|
|
end
|
|
|
|
|
2013-11-30 02:25:17 -05:00
|
|
|
def test_with_index_dangling_memo
|
|
|
|
bug9178 = '[ruby-core:58692] [Bug #9178]'
|
|
|
|
assert_separately([], <<-"end;")
|
|
|
|
bug = "#{bug9178}"
|
|
|
|
e = [1].to_enum(:chunk).with_index {|c,i| i == 5}
|
|
|
|
assert_kind_of(Enumerator, e)
|
|
|
|
assert_equal([false, [1]], e.to_a[0], bug)
|
|
|
|
end;
|
|
|
|
end
|
|
|
|
|
2008-08-26 06:26:45 -04:00
|
|
|
def test_with_object
|
|
|
|
obj = [0, 1]
|
|
|
|
ret = (1..10).each.with_object(obj) {|i, memo|
|
|
|
|
memo[0] += i
|
|
|
|
memo[1] *= i
|
|
|
|
}
|
|
|
|
assert_same(obj, ret)
|
|
|
|
assert_equal([55, 3628800], ret)
|
2008-06-03 08:43:45 -04:00
|
|
|
|
|
|
|
a = [2,5,2,1,5,3,4,2,1,0]
|
2008-08-26 06:26:45 -04:00
|
|
|
obj = {}
|
|
|
|
ret = a.delete_if.with_object(obj) {|i, seen|
|
2008-06-03 08:43:45 -04:00
|
|
|
if seen.key?(i)
|
|
|
|
true
|
|
|
|
else
|
|
|
|
seen[i] = true
|
|
|
|
false
|
|
|
|
end
|
|
|
|
}
|
2008-08-26 06:26:45 -04:00
|
|
|
assert_same(obj, ret)
|
2008-06-03 08:43:45 -04:00
|
|
|
assert_equal([2, 5, 1, 3, 4, 0], a)
|
|
|
|
end
|
|
|
|
|
2008-01-29 08:59:13 -05:00
|
|
|
def test_next_rewind
|
|
|
|
e = @obj.to_enum(:foo, 1, 2, 3)
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_equal(2, e.next)
|
|
|
|
e.rewind
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_equal(2, e.next)
|
|
|
|
assert_equal(3, e.next)
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
end
|
2009-08-18 08:02:53 -04:00
|
|
|
|
|
|
|
def test_peek
|
|
|
|
a = [1]
|
|
|
|
e = a.each
|
|
|
|
assert_equal(1, e.peek)
|
|
|
|
assert_equal(1, e.peek)
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_raise(StopIteration) { e.peek }
|
|
|
|
assert_raise(StopIteration) { e.peek }
|
|
|
|
end
|
|
|
|
|
2009-08-21 11:51:35 -04:00
|
|
|
def test_peek_modify
|
|
|
|
o = Object.new
|
|
|
|
def o.each
|
|
|
|
yield 1,2
|
|
|
|
end
|
|
|
|
e = o.to_enum
|
|
|
|
a = e.peek
|
|
|
|
a << 3
|
|
|
|
assert_equal([1,2], e.peek)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_peek_values_modify
|
|
|
|
o = Object.new
|
|
|
|
def o.each
|
|
|
|
yield 1,2
|
|
|
|
end
|
|
|
|
e = o.to_enum
|
|
|
|
a = e.peek_values
|
|
|
|
a << 3
|
|
|
|
assert_equal([1,2], e.peek)
|
|
|
|
end
|
|
|
|
|
2009-08-18 08:02:53 -04:00
|
|
|
def test_next_after_stopiteration
|
|
|
|
a = [1]
|
|
|
|
e = a.each
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
e.rewind
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
end
|
2009-08-19 12:36:00 -04:00
|
|
|
|
|
|
|
def test_stop_result
|
|
|
|
a = [1]
|
|
|
|
res = a.each {}
|
|
|
|
e = a.each
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
exc = assert_raise(StopIteration) { e.next }
|
|
|
|
assert_equal(res, exc.result)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_next_values
|
|
|
|
o = Object.new
|
|
|
|
def o.each
|
|
|
|
yield
|
|
|
|
yield 1
|
|
|
|
yield 1, 2
|
|
|
|
end
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal(nil, e.next)
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_equal([1,2], e.next)
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal([], e.next_values)
|
|
|
|
assert_equal([1], e.next_values)
|
|
|
|
assert_equal([1,2], e.next_values)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_peek_values
|
|
|
|
o = Object.new
|
|
|
|
def o.each
|
|
|
|
yield
|
|
|
|
yield 1
|
|
|
|
yield 1, 2
|
|
|
|
end
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal(nil, e.peek)
|
|
|
|
assert_equal(nil, e.next)
|
|
|
|
assert_equal(1, e.peek)
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_equal([1,2], e.peek)
|
|
|
|
assert_equal([1,2], e.next)
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal([], e.peek_values)
|
|
|
|
assert_equal([], e.next_values)
|
|
|
|
assert_equal([1], e.peek_values)
|
|
|
|
assert_equal([1], e.next_values)
|
|
|
|
assert_equal([1,2], e.peek_values)
|
|
|
|
assert_equal([1,2], e.next_values)
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal([], e.peek_values)
|
|
|
|
assert_equal(nil, e.next)
|
|
|
|
assert_equal([1], e.peek_values)
|
|
|
|
assert_equal(1, e.next)
|
|
|
|
assert_equal([1,2], e.peek_values)
|
|
|
|
assert_equal([1,2], e.next)
|
|
|
|
e = o.to_enum
|
|
|
|
assert_equal(nil, e.peek)
|
|
|
|
assert_equal([], e.next_values)
|
|
|
|
assert_equal(1, e.peek)
|
|
|
|
assert_equal([1], e.next_values)
|
|
|
|
assert_equal([1,2], e.peek)
|
|
|
|
assert_equal([1,2], e.next_values)
|
|
|
|
end
|
|
|
|
|
2012-03-08 10:26:01 -05:00
|
|
|
def test_each_arg
|
|
|
|
o = Object.new
|
|
|
|
def o.each(ary)
|
|
|
|
ary << 1
|
|
|
|
yield
|
|
|
|
end
|
|
|
|
ary = []
|
2018-10-22 07:23:56 -04:00
|
|
|
e = o.to_enum { 1 }
|
|
|
|
assert_equal(1, e.size)
|
|
|
|
e_arg = e.each(ary)
|
|
|
|
assert_equal(nil, e_arg.size)
|
|
|
|
e_arg.next
|
2012-03-08 10:26:01 -05:00
|
|
|
assert_equal([1], ary)
|
|
|
|
end
|
|
|
|
|
2009-08-19 12:36:00 -04:00
|
|
|
def test_feed
|
|
|
|
o = Object.new
|
|
|
|
def o.each(ary)
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
end
|
|
|
|
ary = []
|
|
|
|
e = o.to_enum(:each, ary)
|
|
|
|
e.next
|
|
|
|
e.feed 1
|
|
|
|
e.next
|
|
|
|
e.feed 2
|
|
|
|
e.next
|
|
|
|
e.feed 3
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
assert_equal([1,2,3], ary)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_feed_mixed
|
|
|
|
o = Object.new
|
|
|
|
def o.each(ary)
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
end
|
|
|
|
ary = []
|
|
|
|
e = o.to_enum(:each, ary)
|
|
|
|
e.next
|
|
|
|
e.feed 1
|
|
|
|
e.next
|
|
|
|
e.next
|
|
|
|
e.feed 3
|
|
|
|
assert_raise(StopIteration) { e.next }
|
|
|
|
assert_equal([1,nil,3], ary)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_feed_twice
|
|
|
|
o = Object.new
|
|
|
|
def o.each(ary)
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
end
|
|
|
|
ary = []
|
|
|
|
e = o.to_enum(:each, ary)
|
|
|
|
e.feed 1
|
|
|
|
assert_raise(TypeError) { e.feed 2 }
|
|
|
|
end
|
|
|
|
|
2009-08-19 13:32:56 -04:00
|
|
|
def test_feed_before_first_next
|
|
|
|
o = Object.new
|
|
|
|
def o.each(ary)
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
end
|
|
|
|
ary = []
|
|
|
|
e = o.to_enum(:each, ary)
|
|
|
|
e.feed 1
|
|
|
|
e.next
|
|
|
|
e.next
|
|
|
|
assert_equal([1], ary)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_rewind_clear_feed
|
|
|
|
o = Object.new
|
|
|
|
def o.each(ary)
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
ary << yield
|
|
|
|
end
|
|
|
|
ary = []
|
|
|
|
e = o.to_enum(:each, ary)
|
|
|
|
e.next
|
|
|
|
e.feed 1
|
|
|
|
e.next
|
|
|
|
e.feed 2
|
|
|
|
e.rewind
|
|
|
|
e.next
|
|
|
|
e.next
|
|
|
|
assert_equal([1,nil], ary)
|
|
|
|
end
|
|
|
|
|
2009-08-19 12:36:00 -04:00
|
|
|
def test_feed_yielder
|
|
|
|
x = nil
|
|
|
|
e = Enumerator.new {|y| x = y.yield; 10 }
|
|
|
|
e.next
|
|
|
|
e.feed 100
|
|
|
|
exc = assert_raise(StopIteration) { e.next }
|
|
|
|
assert_equal(100, x)
|
|
|
|
assert_equal(10, exc.result)
|
|
|
|
end
|
|
|
|
|
2010-01-22 10:03:32 -05:00
|
|
|
def test_inspect
|
|
|
|
e = (0..10).each_cons(2)
|
|
|
|
assert_equal("#<Enumerator: 0..10:each_cons(2)>", e.inspect)
|
2009-08-19 12:36:00 -04:00
|
|
|
|
2018-12-23 19:48:15 -05:00
|
|
|
e = (0..10).each_with_object({})
|
|
|
|
assert_equal("#<Enumerator: 0..10:each_with_object({})>", e.inspect)
|
|
|
|
|
|
|
|
e = (0..10).each_with_object(a: 1)
|
|
|
|
assert_equal("#<Enumerator: 0..10:each_with_object(a: 1)>", e.inspect)
|
|
|
|
|
2012-09-30 08:32:04 -04:00
|
|
|
e = Enumerator.new {|y| y.yield; 10 }
|
2010-01-22 10:03:32 -05:00
|
|
|
assert_match(/\A#<Enumerator: .*:each>/, e.inspect)
|
|
|
|
|
|
|
|
a = []
|
|
|
|
e = a.each_with_object(a)
|
|
|
|
a << e
|
|
|
|
assert_equal("#<Enumerator: [#<Enumerator: ...>]:each_with_object([#<Enumerator: ...>])>",
|
|
|
|
e.inspect)
|
|
|
|
end
|
|
|
|
|
2012-04-02 21:18:31 -04:00
|
|
|
def test_inspect_verbose
|
|
|
|
bug6214 = '[ruby-dev:45449]'
|
2012-11-24 12:14:06 -05:00
|
|
|
assert_warning("", bug6214) { "".bytes.inspect }
|
|
|
|
assert_warning("", bug6214) { [].lazy.inspect }
|
2012-04-02 21:18:31 -04:00
|
|
|
end
|
|
|
|
|
2013-05-17 22:05:17 -04:00
|
|
|
def test_inspect_encoding
|
|
|
|
c = Class.new{define_method("\u{3042}"){}}
|
|
|
|
e = c.new.enum_for("\u{3042}")
|
|
|
|
s = assert_nothing_raised(Encoding::CompatibilityError) {break e.inspect}
|
|
|
|
assert_equal(Encoding::UTF_8, s.encoding)
|
|
|
|
assert_match(/\A#<Enumerator: .*:\u{3042}>\z/, s)
|
|
|
|
end
|
|
|
|
|
2010-01-22 10:03:32 -05:00
|
|
|
def test_generator
|
|
|
|
# note: Enumerator::Generator is a class just for internal
|
|
|
|
g = Enumerator::Generator.new {|y| y << 1 << 2 << 3; :foo }
|
|
|
|
g2 = g.dup
|
|
|
|
a = []
|
|
|
|
assert_equal(:foo, g.each {|x| a << x })
|
|
|
|
assert_equal([1, 2, 3], a)
|
|
|
|
a = []
|
|
|
|
assert_equal(:foo, g2.each {|x| a << x })
|
|
|
|
assert_equal([1, 2, 3], a)
|
2013-07-29 08:06:42 -04:00
|
|
|
|
|
|
|
g.freeze
|
2017-12-11 19:46:34 -05:00
|
|
|
assert_raise(FrozenError) {
|
2013-07-29 08:06:42 -04:00
|
|
|
g.__send__ :initialize, proc { |y| y << 4 << 5 }
|
|
|
|
}
|
2015-09-27 22:40:46 -04:00
|
|
|
|
|
|
|
g = Enumerator::Generator.new(proc {|y| y << 4 << 5; :foo })
|
|
|
|
a = []
|
|
|
|
assert_equal(:foo, g.each {|x| a << x })
|
|
|
|
assert_equal([4, 5], a)
|
|
|
|
|
|
|
|
assert_raise(LocalJumpError) {Enumerator::Generator.new}
|
|
|
|
assert_raise(TypeError) {Enumerator::Generator.new(1)}
|
|
|
|
obj = eval("class C\u{1f5ff}; self; end").new
|
|
|
|
assert_raise_with_message(TypeError, /C\u{1f5ff}/) {
|
|
|
|
Enumerator::Generator.new(obj)
|
|
|
|
}
|
2010-01-22 10:03:32 -05:00
|
|
|
end
|
|
|
|
|
2012-03-08 10:26:01 -05:00
|
|
|
def test_generator_args
|
|
|
|
g = Enumerator::Generator.new {|y, x| y << 1 << 2 << 3; x }
|
|
|
|
a = []
|
|
|
|
assert_equal(:bar, g.each(:bar) {|x| a << x })
|
|
|
|
assert_equal([1, 2, 3], a)
|
|
|
|
end
|
|
|
|
|
2010-01-22 10:03:32 -05:00
|
|
|
def test_yielder
|
|
|
|
# note: Enumerator::Yielder is a class just for internal
|
|
|
|
a = []
|
|
|
|
y = Enumerator::Yielder.new {|x| a << x }
|
|
|
|
assert_equal(y, y << 1 << 2 << 3)
|
|
|
|
assert_equal([1, 2, 3], a)
|
|
|
|
|
|
|
|
a = []
|
|
|
|
y = Enumerator::Yielder.new {|x| a << x }
|
|
|
|
assert_equal([1], y.yield(1))
|
|
|
|
assert_equal([1, 2], y.yield(2))
|
|
|
|
assert_equal([1, 2, 3], y.yield(3))
|
2018-09-18 04:30:24 -04:00
|
|
|
assert_equal([1, 2, 3, 4], y.yield(4, 5))
|
|
|
|
|
|
|
|
a = []
|
|
|
|
y = Enumerator::Yielder.new {|*x| a.concat(x) }
|
|
|
|
assert_equal([1], y.yield(1))
|
|
|
|
assert_equal([1, 2, 3], y.yield(2, 3))
|
2010-01-22 10:03:32 -05:00
|
|
|
|
|
|
|
assert_raise(LocalJumpError) { Enumerator::Yielder.new }
|
2019-03-11 05:49:14 -04:00
|
|
|
|
|
|
|
# to_proc (explicit)
|
|
|
|
a = []
|
|
|
|
y = Enumerator::Yielder.new {|x| a << x }
|
|
|
|
b = y.to_proc
|
|
|
|
assert_kind_of(Proc, b)
|
|
|
|
assert_equal([1], b.call(1))
|
|
|
|
assert_equal([1], a)
|
|
|
|
|
|
|
|
# to_proc (implicit)
|
|
|
|
e = Enumerator.new { |y|
|
|
|
|
assert_kind_of(Enumerator::Yielder, y)
|
|
|
|
[1, 2, 3].each(&y)
|
|
|
|
}
|
|
|
|
assert_equal([1, 2, 3], e.to_a)
|
2010-01-22 10:03:32 -05:00
|
|
|
end
|
2012-11-06 12:10:06 -05:00
|
|
|
|
|
|
|
def test_size
|
|
|
|
assert_equal nil, Enumerator.new{}.size
|
|
|
|
assert_equal 42, Enumerator.new(->{42}){}.size
|
2013-08-26 22:50:08 -04:00
|
|
|
obj = Object.new
|
|
|
|
def obj.call; 42; end
|
|
|
|
assert_equal 42, Enumerator.new(obj){}.size
|
2012-11-06 12:10:06 -05:00
|
|
|
assert_equal 42, Enumerator.new(42){}.size
|
|
|
|
assert_equal 1 << 70, Enumerator.new(1 << 70){}.size
|
|
|
|
assert_equal Float::INFINITY, Enumerator.new(Float::INFINITY){}.size
|
|
|
|
assert_equal nil, Enumerator.new(nil){}.size
|
|
|
|
assert_raise(TypeError) { Enumerator.new("42"){} }
|
2012-11-06 12:10:20 -05:00
|
|
|
|
|
|
|
assert_equal nil, @obj.to_enum(:foo, 0, 1).size
|
|
|
|
assert_equal 2, @obj.to_enum(:foo, 0, 1){ 2 }.size
|
2012-11-06 12:10:06 -05:00
|
|
|
end
|
2012-11-06 12:10:35 -05:00
|
|
|
|
|
|
|
def test_size_for_enum_created_by_enumerators
|
|
|
|
enum = to_enum{ 42 }
|
|
|
|
assert_equal 42, enum.with_index.size
|
|
|
|
assert_equal 42, enum.with_object(:foo).size
|
|
|
|
end
|
* array.c: Support for Enumerator#size in trivial cases:
each, each_index, reverse_each, sort_by, collect,
collect!, select, select!, keep_if, reject, reject!, delete_if
[Feature #6636]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37500 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-06 12:10:50 -05:00
|
|
|
|
|
|
|
def test_size_for_enum_created_from_array
|
|
|
|
arr = %w[hello world]
|
|
|
|
%i[each each_with_index reverse_each sort_by! sort_by map map!
|
2018-02-25 08:52:07 -05:00
|
|
|
keep_if reject! reject select! select filter! filter delete_if].each do |method|
|
* array.c: Support for Enumerator#size in trivial cases:
each, each_index, reverse_each, sort_by, collect,
collect!, select, select!, keep_if, reject, reject!, delete_if
[Feature #6636]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37500 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-06 12:10:50 -05:00
|
|
|
assert_equal arr.size, arr.send(method).size
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2012-11-06 12:12:35 -05:00
|
|
|
def test_size_for_enum_created_from_enumerable
|
|
|
|
%i[find_all reject map flat_map partition group_by sort_by min_by max_by
|
2018-11-20 05:51:08 -05:00
|
|
|
minmax_by each_with_index reverse_each each_entry filter_map].each do |method|
|
2012-11-06 12:12:35 -05:00
|
|
|
assert_equal nil, @obj.send(method).size
|
|
|
|
assert_equal 42, @sized.send(method).size
|
|
|
|
end
|
|
|
|
assert_equal nil, @obj.each_with_object(nil).size
|
|
|
|
assert_equal 42, @sized.each_with_object(nil).size
|
|
|
|
end
|
|
|
|
|
2012-11-06 12:13:33 -05:00
|
|
|
def test_size_for_enum_created_from_hash
|
|
|
|
h = {a: 1, b: 2, c: 3}
|
2018-02-25 08:52:07 -05:00
|
|
|
methods = %i[delete_if reject reject! select select! filter filter! keep_if each each_key each_pair]
|
2013-12-06 21:16:04 -05:00
|
|
|
enums = methods.map {|method| h.send(method)}
|
|
|
|
s = enums.group_by(&:size)
|
|
|
|
assert_equal([3], s.keys, ->{s.reject!{|k| k==3}.inspect})
|
|
|
|
h[:d] = 4
|
|
|
|
s = enums.group_by(&:size)
|
|
|
|
assert_equal([4], s.keys, ->{s.reject!{|k| k==4}.inspect})
|
2012-11-06 12:13:33 -05:00
|
|
|
end
|
|
|
|
|
2012-11-06 12:13:48 -05:00
|
|
|
def test_size_for_enum_created_from_env
|
2018-02-25 08:52:07 -05:00
|
|
|
%i[each_pair reject! delete_if select select! filter filter! keep_if].each do |method|
|
2012-11-06 12:13:48 -05:00
|
|
|
assert_equal ENV.size, ENV.send(method).size
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2012-11-06 12:14:02 -05:00
|
|
|
def test_size_for_enum_created_from_struct
|
|
|
|
s = Struct.new(:foo, :bar, :baz).new(1, 2)
|
|
|
|
%i[each each_pair select].each do |method|
|
|
|
|
assert_equal 3, s.send(method).size
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2012-11-06 12:11:06 -05:00
|
|
|
def check_consistency_for_combinatorics(method)
|
|
|
|
[ [], [:a, :b, :c, :d, :e] ].product([-2, 0, 2, 5, 6]) do |array, arg|
|
|
|
|
assert_equal array.send(method, arg).to_a.size, array.send(method, arg).size,
|
|
|
|
"inconsistent size for #{array}.#{method}(#{arg})"
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_size_for_array_combinatorics
|
|
|
|
check_consistency_for_combinatorics(:permutation)
|
|
|
|
assert_equal 24, [0, 1, 2, 4].permutation.size
|
|
|
|
assert_equal 2933197128679486453788761052665610240000000,
|
|
|
|
(1..42).to_a.permutation(30).size # 1.upto(42).inject(:*) / 1.upto(12).inject(:*)
|
2012-11-06 12:11:21 -05:00
|
|
|
|
|
|
|
check_consistency_for_combinatorics(:combination)
|
|
|
|
assert_equal 28258808871162574166368460400,
|
|
|
|
(1..100).to_a.combination(42).size
|
|
|
|
# 1.upto(100).inject(:*) / 1.upto(42).inject(:*) / 1.upto(58).inject(:*)
|
2012-11-06 12:11:36 -05:00
|
|
|
|
|
|
|
check_consistency_for_combinatorics(:repeated_permutation)
|
|
|
|
assert_equal 291733167875766667063796853374976,
|
|
|
|
(1..42).to_a.repeated_permutation(20).size # 42 ** 20
|
2012-11-06 12:11:51 -05:00
|
|
|
|
|
|
|
check_consistency_for_combinatorics(:repeated_combination)
|
|
|
|
assert_equal 28258808871162574166368460400,
|
|
|
|
(1..59).to_a.repeated_combination(42).size
|
|
|
|
# 1.upto(100).inject(:*) / 1.upto(42).inject(:*) / 1.upto(58).inject(:*)
|
2012-11-06 12:11:06 -05:00
|
|
|
end
|
2012-11-06 12:12:05 -05:00
|
|
|
|
|
|
|
def test_size_for_cycle
|
|
|
|
assert_equal Float::INFINITY, [:foo].cycle.size
|
|
|
|
assert_equal 10, [:foo, :bar].cycle(5).size
|
|
|
|
assert_equal 0, [:foo, :bar].cycle(-10).size
|
2017-11-05 17:14:25 -05:00
|
|
|
assert_equal Float::INFINITY, {foo: 1}.cycle.size
|
|
|
|
assert_equal 10, {foo: 1, bar: 2}.cycle(5).size
|
|
|
|
assert_equal 0, {foo: 1, bar: 2}.cycle(-10).size
|
2012-11-06 12:12:05 -05:00
|
|
|
assert_equal 0, [].cycle.size
|
|
|
|
assert_equal 0, [].cycle(5).size
|
2017-11-05 17:14:25 -05:00
|
|
|
assert_equal 0, {}.cycle.size
|
|
|
|
assert_equal 0, {}.cycle(5).size
|
2012-11-06 12:13:19 -05:00
|
|
|
|
|
|
|
assert_equal nil, @obj.cycle.size
|
|
|
|
assert_equal nil, @obj.cycle(5).size
|
|
|
|
assert_equal Float::INFINITY, @sized.cycle.size
|
|
|
|
assert_equal 126, @sized.cycle(3).size
|
2017-11-05 17:14:25 -05:00
|
|
|
assert_equal Float::INFINITY, [].to_enum { 42 }.cycle.size
|
|
|
|
assert_equal 0, [].to_enum { 0 }.cycle.size
|
2017-11-05 18:32:50 -05:00
|
|
|
|
|
|
|
assert_raise(TypeError) {[].to_enum { 0 }.cycle("").size}
|
2012-11-06 12:12:05 -05:00
|
|
|
end
|
2012-11-06 12:12:20 -05:00
|
|
|
|
|
|
|
def test_size_for_loops
|
|
|
|
assert_equal Float::INFINITY, loop.size
|
2012-11-06 12:15:30 -05:00
|
|
|
assert_equal 42, 42.times.size
|
2012-11-06 12:12:20 -05:00
|
|
|
end
|
2012-11-06 12:12:50 -05:00
|
|
|
|
|
|
|
def test_size_for_each_slice
|
|
|
|
assert_equal nil, @obj.each_slice(3).size
|
|
|
|
assert_equal 6, @sized.each_slice(7).size
|
|
|
|
assert_equal 5, @sized.each_slice(10).size
|
|
|
|
assert_equal 1, @sized.each_slice(70).size
|
|
|
|
assert_raise(ArgumentError){ @obj.each_slice(0).size }
|
|
|
|
end
|
2012-11-06 12:13:04 -05:00
|
|
|
|
|
|
|
def test_size_for_each_cons
|
|
|
|
assert_equal nil, @obj.each_cons(3).size
|
|
|
|
assert_equal 33, @sized.each_cons(10).size
|
|
|
|
assert_equal 0, @sized.each_cons(70).size
|
|
|
|
assert_raise(ArgumentError){ @obj.each_cons(0).size }
|
|
|
|
end
|
2012-11-06 12:14:31 -05:00
|
|
|
|
|
|
|
def test_size_for_step
|
|
|
|
assert_equal 42, 5.step(46).size
|
|
|
|
assert_equal 4, 1.step(10, 3).size
|
|
|
|
assert_equal 3, 1.step(9, 3).size
|
|
|
|
assert_equal 0, 1.step(-11).size
|
|
|
|
assert_equal 0, 1.step(-11, 2).size
|
|
|
|
assert_equal 7, 1.step(-11, -2).size
|
|
|
|
assert_equal 7, 1.step(-11.1, -2).size
|
|
|
|
assert_equal 0, 42.step(Float::INFINITY, -2).size
|
|
|
|
assert_equal 1, 42.step(55, Float::INFINITY).size
|
|
|
|
assert_equal 1, 42.step(Float::INFINITY, Float::INFINITY).size
|
|
|
|
assert_equal 14, 0.1.step(4.2, 0.3).size
|
|
|
|
assert_equal Float::INFINITY, 42.step(Float::INFINITY, 2).size
|
2012-11-06 12:15:00 -05:00
|
|
|
|
|
|
|
assert_equal 10, (1..10).step.size
|
|
|
|
assert_equal 4, (1..10).step(3).size
|
|
|
|
assert_equal 3, (1...10).step(3).size
|
|
|
|
assert_equal Float::INFINITY, (42..Float::INFINITY).step(2).size
|
2018-08-06 05:08:28 -04:00
|
|
|
assert_equal 0, (1..10).step(-2).size
|
2012-11-06 12:14:31 -05:00
|
|
|
end
|
2012-11-06 12:15:15 -05:00
|
|
|
|
|
|
|
def test_size_for_downup_to
|
|
|
|
assert_equal 0, 1.upto(-100).size
|
|
|
|
assert_equal 102, 1.downto(-100).size
|
|
|
|
assert_equal Float::INFINITY, 42.upto(Float::INFINITY).size
|
|
|
|
end
|
2012-11-06 12:15:45 -05:00
|
|
|
|
|
|
|
def test_size_for_string
|
|
|
|
assert_equal 5, 'hello'.each_byte.size
|
|
|
|
assert_equal 5, 'hello'.each_char.size
|
|
|
|
assert_equal 5, 'hello'.each_codepoint.size
|
|
|
|
end
|
2013-12-13 23:17:06 -05:00
|
|
|
|
|
|
|
def test_peek_for_enumerator_objects
|
|
|
|
e = 2.times
|
|
|
|
assert_equal(0, e.peek)
|
|
|
|
e.next
|
|
|
|
assert_equal(1, e.peek)
|
|
|
|
e.next
|
|
|
|
assert_raise(StopIteration) { e.peek }
|
|
|
|
end
|
2016-07-20 04:44:08 -04:00
|
|
|
|
|
|
|
def test_uniq
|
2018-03-12 21:00:08 -04:00
|
|
|
u = [0, 1, 0, 1].to_enum.lazy.uniq
|
|
|
|
assert_equal([0, 1], u.force)
|
|
|
|
assert_equal([0, 1], u.force)
|
2016-07-20 04:44:08 -04:00
|
|
|
end
|
2007-11-15 20:30:29 -05:00
|
|
|
|
2020-12-05 06:39:20 -05:00
|
|
|
def test_compact
|
|
|
|
u = [0, 1, nil, 2, 3, nil].to_enum.lazy.compact
|
|
|
|
assert_equal([0, 1, 2, 3], u.force)
|
|
|
|
end
|
|
|
|
|
Implement Enumerator#+ and Enumerable#chain [Feature #15144]
They return an Enumerator::Chain object which is a subclass of
Enumerator, which represents a chain of enumerables that works as a
single enumerator.
```ruby
e = (1..3).chain([4, 5])
e.to_a #=> [1, 2, 3, 4, 5]
e = (1..3).each + [4, 5]
e.to_a #=> [1, 2, 3, 4, 5]
```
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65949 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-11-24 03:38:35 -05:00
|
|
|
def test_enum_chain_and_plus
|
|
|
|
r = 1..5
|
|
|
|
|
|
|
|
e1 = r.chain()
|
|
|
|
assert_kind_of(Enumerator::Chain, e1)
|
|
|
|
assert_equal(5, e1.size)
|
|
|
|
ary = []
|
|
|
|
e1.each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5], ary)
|
|
|
|
|
|
|
|
e2 = r.chain([6, 7, 8])
|
|
|
|
assert_kind_of(Enumerator::Chain, e2)
|
|
|
|
assert_equal(8, e2.size)
|
|
|
|
ary = []
|
|
|
|
e2.each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 6, 7, 8], ary)
|
|
|
|
|
|
|
|
e3 = r.chain([6, 7], 8.step)
|
|
|
|
assert_kind_of(Enumerator::Chain, e3)
|
|
|
|
assert_equal(Float::INFINITY, e3.size)
|
|
|
|
ary = []
|
|
|
|
e3.take(10).each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], ary)
|
|
|
|
|
|
|
|
# `a + b + c` should not return `Enumerator::Chain.new(a, b, c)`
|
|
|
|
# because it is expected that `(a + b).each` be called.
|
|
|
|
e4 = e2.dup
|
|
|
|
class << e4
|
|
|
|
attr_reader :each_is_called
|
|
|
|
def each
|
|
|
|
super
|
|
|
|
@each_is_called = true
|
|
|
|
end
|
|
|
|
end
|
|
|
|
e5 = e4 + 9.step
|
|
|
|
assert_kind_of(Enumerator::Chain, e5)
|
|
|
|
assert_equal(Float::INFINITY, e5.size)
|
|
|
|
ary = []
|
|
|
|
e5.take(10).each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], ary)
|
|
|
|
assert_equal(true, e4.each_is_called)
|
|
|
|
end
|
|
|
|
|
|
|
|
def test_chained_enums
|
|
|
|
a = (1..5).each
|
|
|
|
|
|
|
|
e0 = Enumerator::Chain.new()
|
|
|
|
assert_kind_of(Enumerator::Chain, e0)
|
|
|
|
assert_equal(0, e0.size)
|
|
|
|
ary = []
|
|
|
|
e0.each { |x| ary << x }
|
|
|
|
assert_equal([], ary)
|
|
|
|
|
|
|
|
e1 = Enumerator::Chain.new(a)
|
|
|
|
assert_kind_of(Enumerator::Chain, e1)
|
|
|
|
assert_equal(5, e1.size)
|
|
|
|
ary = []
|
|
|
|
e1.each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5], ary)
|
|
|
|
|
|
|
|
e2 = Enumerator::Chain.new(a, [6, 7, 8])
|
|
|
|
assert_kind_of(Enumerator::Chain, e2)
|
|
|
|
assert_equal(8, e2.size)
|
|
|
|
ary = []
|
|
|
|
e2.each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 6, 7, 8], ary)
|
|
|
|
|
|
|
|
e3 = Enumerator::Chain.new(a, [6, 7], 8.step)
|
|
|
|
assert_kind_of(Enumerator::Chain, e3)
|
|
|
|
assert_equal(Float::INFINITY, e3.size)
|
|
|
|
ary = []
|
|
|
|
e3.take(10).each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], ary)
|
|
|
|
|
|
|
|
e4 = Enumerator::Chain.new(a, Enumerator.new { |y| y << 6 << 7 << 8 })
|
|
|
|
assert_kind_of(Enumerator::Chain, e4)
|
|
|
|
assert_equal(nil, e4.size)
|
|
|
|
ary = []
|
|
|
|
e4.each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 6, 7, 8], ary)
|
|
|
|
|
|
|
|
e5 = Enumerator::Chain.new(e1, e2)
|
|
|
|
assert_kind_of(Enumerator::Chain, e5)
|
|
|
|
assert_equal(13, e5.size)
|
|
|
|
ary = []
|
|
|
|
e5.each { |x| ary << x }
|
|
|
|
assert_equal([1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 6, 7, 8], ary)
|
|
|
|
|
|
|
|
rewound = []
|
|
|
|
e1.define_singleton_method(:rewind) { rewound << object_id }
|
|
|
|
e2.define_singleton_method(:rewind) { rewound << object_id }
|
|
|
|
e5.rewind
|
|
|
|
assert_equal(rewound, [e2.object_id, e1.object_id])
|
|
|
|
|
|
|
|
rewound = []
|
|
|
|
a = [1]
|
|
|
|
e6 = Enumerator::Chain.new(a)
|
|
|
|
a.define_singleton_method(:rewind) { rewound << object_id }
|
|
|
|
e6.rewind
|
|
|
|
assert_equal(rewound, [])
|
|
|
|
|
|
|
|
assert_equal(
|
|
|
|
'#<Enumerator::Chain: [' +
|
|
|
|
'#<Enumerator::Chain: [' +
|
|
|
|
'#<Enumerator: 1..5:each>' +
|
|
|
|
']>, ' +
|
|
|
|
'#<Enumerator::Chain: [' +
|
|
|
|
'#<Enumerator: 1..5:each>, ' +
|
|
|
|
'[6, 7, 8]' +
|
|
|
|
']>' +
|
|
|
|
']>',
|
|
|
|
e5.inspect
|
|
|
|
)
|
|
|
|
end
|
2019-09-12 07:15:03 -04:00
|
|
|
|
2020-11-24 17:05:22 -05:00
|
|
|
def test_chain_with_index
|
|
|
|
assert_equal([[3, 0], [4, 1]], [3].chain([4]).with_index.to_a)
|
|
|
|
end
|
|
|
|
|
2021-03-05 15:25:51 -05:00
|
|
|
def test_lazy_chain
|
|
|
|
ea = (10..).lazy.select(&:even?).take(10)
|
|
|
|
ed = (20..).lazy.select(&:odd?)
|
|
|
|
chain = (ea + ed).select{|x| x % 3 == 0}
|
|
|
|
assert_equal(12, chain.next)
|
|
|
|
assert_equal(18, chain.next)
|
|
|
|
assert_equal(24, chain.next)
|
|
|
|
assert_equal(21, chain.next)
|
|
|
|
assert_equal(27, chain.next)
|
|
|
|
assert_equal(33, chain.next)
|
|
|
|
end
|
|
|
|
|
2021-03-05 15:47:00 -05:00
|
|
|
def test_chain_undef_methods
|
|
|
|
chain = [1].to_enum + [2].to_enum
|
|
|
|
meths = (chain.methods & [:feed, :next, :next_values, :peek, :peek_values])
|
|
|
|
assert_equal(0, meths.size)
|
|
|
|
end
|
|
|
|
|
2019-09-12 07:15:03 -04:00
|
|
|
def test_produce
|
|
|
|
assert_raise(ArgumentError) { Enumerator.produce }
|
|
|
|
|
|
|
|
# Without initial object
|
|
|
|
passed_args = []
|
|
|
|
enum = Enumerator.produce { |obj| passed_args << obj; (obj || 0).succ }
|
|
|
|
assert_instance_of(Enumerator, enum)
|
|
|
|
assert_equal Float::INFINITY, enum.size
|
|
|
|
assert_equal [1, 2, 3], enum.take(3)
|
|
|
|
assert_equal [nil, 1, 2], passed_args
|
|
|
|
|
|
|
|
# With initial object
|
|
|
|
passed_args = []
|
|
|
|
enum = Enumerator.produce(1) { |obj| passed_args << obj; obj.succ }
|
|
|
|
assert_instance_of(Enumerator, enum)
|
|
|
|
assert_equal Float::INFINITY, enum.size
|
|
|
|
assert_equal [1, 2, 3], enum.take(3)
|
|
|
|
assert_equal [1, 2], passed_args
|
|
|
|
|
2019-09-30 00:33:59 -04:00
|
|
|
# With initial keyword arguments
|
|
|
|
passed_args = []
|
|
|
|
enum = Enumerator.produce(a: 1, b: 1) { |obj| passed_args << obj; obj.shift if obj.respond_to?(:shift)}
|
|
|
|
assert_instance_of(Enumerator, enum)
|
|
|
|
assert_equal Float::INFINITY, enum.size
|
|
|
|
assert_equal [{b: 1}, [1], :a, nil], enum.take(4)
|
|
|
|
assert_equal [{b: 1}, [1], :a], passed_args
|
|
|
|
|
2019-09-12 07:15:03 -04:00
|
|
|
# Raising StopIteration
|
|
|
|
words = "The quick brown fox jumps over the lazy dog.".scan(/\w+/)
|
|
|
|
enum = Enumerator.produce { words.shift or raise StopIteration }
|
|
|
|
assert_equal Float::INFINITY, enum.size
|
|
|
|
assert_instance_of(Enumerator, enum)
|
|
|
|
assert_equal %w[The quick brown fox jumps over the lazy dog], enum.to_a
|
|
|
|
|
|
|
|
# Raising StopIteration
|
|
|
|
object = [[[["abc", "def"], "ghi", "jkl"], "mno", "pqr"], "stuv", "wxyz"]
|
|
|
|
enum = Enumerator.produce(object) { |obj|
|
|
|
|
obj.respond_to?(:first) or raise StopIteration
|
|
|
|
obj.first
|
|
|
|
}
|
|
|
|
assert_equal Float::INFINITY, enum.size
|
|
|
|
assert_instance_of(Enumerator, enum)
|
|
|
|
assert_nothing_raised {
|
|
|
|
assert_equal [
|
|
|
|
[[[["abc", "def"], "ghi", "jkl"], "mno", "pqr"], "stuv", "wxyz"],
|
|
|
|
[[["abc", "def"], "ghi", "jkl"], "mno", "pqr"],
|
|
|
|
[["abc", "def"], "ghi", "jkl"],
|
|
|
|
["abc", "def"],
|
|
|
|
"abc",
|
|
|
|
], enum.to_a
|
|
|
|
}
|
|
|
|
end
|
2019-08-28 19:41:39 -04:00
|
|
|
|
|
|
|
def test_chain_each_lambda
|
|
|
|
c = Class.new do
|
|
|
|
include Enumerable
|
|
|
|
attr_reader :is_lambda
|
|
|
|
def each(&block)
|
|
|
|
return to_enum unless block
|
|
|
|
@is_lambda = block.lambda?
|
|
|
|
end
|
|
|
|
end
|
|
|
|
e = c.new
|
|
|
|
e.chain.each{}
|
|
|
|
assert_equal(false, e.is_lambda)
|
|
|
|
e.chain.each(&->{})
|
|
|
|
assert_equal(true, e.is_lambda)
|
|
|
|
end
|
2022-07-29 00:56:54 -04:00
|
|
|
|
|
|
|
def test_product
|
|
|
|
e = Enumerator::Product.new
|
|
|
|
assert_instance_of(Enumerator::Product, e)
|
|
|
|
assert_kind_of(Enumerator, e)
|
|
|
|
assert_equal(1, e.size)
|
|
|
|
elts = []
|
|
|
|
e.each { |*x| elts << x }
|
|
|
|
assert_equal [[]], elts
|
|
|
|
|
|
|
|
e = Enumerator::Product.new(1..3, %w[a b])
|
|
|
|
assert_instance_of(Enumerator::Product, e)
|
|
|
|
assert_kind_of(Enumerator, e)
|
|
|
|
assert_equal(3 * 2, e.size)
|
|
|
|
elts = []
|
|
|
|
e.each { |*x| elts << x }
|
|
|
|
assert_equal [[1, "a"], [1, "b"], [2, "a"], [2, "b"], [3, "a"], [3, "b"]], elts
|
|
|
|
|
|
|
|
e = Enumerator.product(1..3, %w[a b])
|
|
|
|
assert_instance_of(Enumerator::Product, e)
|
|
|
|
|
|
|
|
elts = []
|
|
|
|
ret = Enumerator.product(1..3, %w[a b]) { |*x| elts << x }
|
|
|
|
assert_instance_of(Enumerator::Product, ret)
|
|
|
|
assert_equal [[1, "a"], [1, "b"], [2, "a"], [2, "b"], [3, "a"], [3, "b"]], elts
|
|
|
|
|
|
|
|
e = Enumerator.product(1.., 'a'..'c')
|
|
|
|
assert_equal(Float::INFINITY, e.size)
|
|
|
|
assert_equal [[1, "a"], [1, "b"], [1, "c"], [2, "a"]], e.take(4)
|
|
|
|
|
|
|
|
e = Enumerator.product(1.., Enumerator.new { |y| y << 'a' << 'b' })
|
|
|
|
assert_equal(Float::INFINITY, e.size)
|
|
|
|
assert_equal [[1, "a"], [1, "b"], [2, "a"], [2, "b"]], e.take(4)
|
|
|
|
|
|
|
|
e = Enumerator.product(1..3, Enumerator.new { |y| y << 'a' << 'b' })
|
|
|
|
assert_equal(nil, e.size)
|
|
|
|
assert_equal [[1, "a"], [1, "b"], [2, "a"], [2, "b"]], e.take(4)
|
|
|
|
end
|
Implement Enumerator#+ and Enumerable#chain [Feature #15144]
They return an Enumerator::Chain object which is a subclass of
Enumerator, which represents a chain of enumerables that works as a
single enumerator.
```ruby
e = (1..3).chain([4, 5])
e.to_a #=> [1, 2, 3, 4, 5]
e = (1..3).each + [4, 5]
e.to_a #=> [1, 2, 3, 4, 5]
```
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65949 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-11-24 03:38:35 -05:00
|
|
|
end
|