mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
0c0f754400
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24588 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
315 lines
6.5 KiB
Ruby
315 lines
6.5 KiB
Ruby
require 'test/unit'
|
|
|
|
class TestEnumerator < Test::Unit::TestCase
|
|
def setup
|
|
@obj = Object.new
|
|
class << @obj
|
|
include Enumerable
|
|
def foo(*a)
|
|
a.each {|x| yield x }
|
|
end
|
|
end
|
|
end
|
|
|
|
def enum_test obj
|
|
i = 0
|
|
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)
|
|
assert_equal [[:x, 1], [:y, 2]], enum_test({:x=>1, :y=>2})
|
|
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
|
|
|
|
def test_nested_itaration
|
|
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
|
|
|
|
|
|
def test_initialize
|
|
assert_equal([1, 2, 3], @obj.to_enum(:foo, 1, 2, 3).to_a)
|
|
assert_equal([1, 2, 3], Enumerator.new(@obj, :foo, 1, 2, 3).to_a)
|
|
assert_equal([1, 2, 3], Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.take(3))
|
|
assert_raise(ArgumentError) { Enumerator.new }
|
|
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 }
|
|
|
|
e = Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.dup
|
|
assert_nothing_raised { assert_equal(1, e.next) }
|
|
assert_raise(TypeError) { e.dup }
|
|
end
|
|
|
|
def test_gc
|
|
assert_nothing_raised do
|
|
1.times do
|
|
foo = [1,2,3].to_enum
|
|
GC.start
|
|
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
|
|
|
|
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)
|
|
assert_equal([[1,5],[2,6],[3,7]], @obj.to_enum(:foo, 1, 2, 3).with_index(5).to_a)
|
|
end
|
|
|
|
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)
|
|
|
|
a = [2,5,2,1,5,3,4,2,1,0]
|
|
obj = {}
|
|
ret = a.delete_if.with_object(obj) {|i, seen|
|
|
if seen.key?(i)
|
|
true
|
|
else
|
|
seen[i] = true
|
|
false
|
|
end
|
|
}
|
|
assert_same(obj, ret)
|
|
assert_equal([2, 5, 1, 3, 4, 0], a)
|
|
end
|
|
|
|
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
|
|
|
|
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
|
|
|
|
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
|
|
|
|
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
|
|
|
|
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
|
|
|
|
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
|
|
|
|
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
|
|
|
|
|
|
end
|
|
|