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require_relative '../../spec_helper'
require_relative '../../shared/enumerator/with_index'
require_relative '../enumerable/shared/enumeratorized'
describe "Enumerator#each_with_index" do
it_behaves_like :enum_with_index, :each_with_index
it_behaves_like :enumeratorized_with_origin_size, :each_with_index, [1,2,3].select
it "returns a new Enumerator when no block is given" do
enum1 = [1,2,3].select
enum2 = enum1.each_with_index
enum2.should be_an_instance_of(Enumerator)
enum1.should_not === enum2
end
it "raises an ArgumentError if passed extra arguments" do
lambda do
[1].to_enum.each_with_index(:glark)
end.should raise_error(ArgumentError)
end
it "passes on the given block's return value" do
arr = [1,2,3]
arr.delete_if.with_index { |a,b| false }
arr.should == [1,2,3]
end
it "returns the iterator's return value" do
[1,2,3].select.with_index { |a,b| false }.should == []
end
end
describe "Enumerator#each_with_index" do
it "returns the correct value if chained with itself" do
[:a].each_with_index.each_with_index.to_a.should == [[[:a,0],0]]
[:a].each.with_index.with_index.to_a.should == [[[:a,0],0]]
end
end
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