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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/enumeratorize'
require_relative '../enumerable/shared/enumeratorized'
# Modifying a collection while the contents are being iterated
# gives undefined behavior. See
# https://blade.ruby-lang.org/ruby-core/23633
describe "Array#reverse_each" do
before :each do
ScratchPad.record []
end
it "traverses array in reverse order and pass each element to block" do
[1, 3, 4, 6].reverse_each { |i| ScratchPad << i }
ScratchPad.recorded.should == [6, 4, 3, 1]
end
it "returns self" do
a = [:a, :b, :c]
a.reverse_each { |x| }.should equal(a)
end
it "yields only the top level element of an empty recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.reverse_each { |i| ScratchPad << i }
ScratchPad.recorded.should == [empty]
end
it "yields only the top level element of a recursive array" do
array = ArraySpecs.recursive_array
array.reverse_each { |i| ScratchPad << i }
ScratchPad.recorded.should == [array, array, array, array, array, 3.0, 'two', 1]
end
it "returns the correct size when no block is given" do
[1, 2, 3].reverse_each.size.should == 3
end
it "tolerates increasing an array size during iteration" do
array = [:a, :b, :c]
ScratchPad.record []
i = 0
array.reverse_each do |e|
ScratchPad << e
array.prepend i if i < 100
i += 1
end
ScratchPad.recorded.should == [:c, :a, 1]
end
it_behaves_like :enumeratorize, :reverse_each
it_behaves_like :enumeratorized_with_origin_size, :reverse_each, [1,2,3]
end
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