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require_relative '../../spec_helper'
describe "Enumerator.new" do
it "creates a new custom enumerator with the given object, iterator and arguments" do
enum = Enumerator.new(1, :upto, 3)
enum.should be_an_instance_of(Enumerator)
end
it "creates a new custom enumerator that responds to #each" do
enum = Enumerator.new(1, :upto, 3)
enum.respond_to?(:each).should == true
end
it "creates a new custom enumerator that runs correctly" do
Enumerator.new(1, :upto, 3).map{|x|x}.should == [1,2,3]
end
it "aliases the second argument to :each" do
Enumerator.new(1..2).to_a.should == Enumerator.new(1..2, :each).to_a
end
it "doesn't check for the presence of the iterator method" do
Enumerator.new(nil).should be_an_instance_of(Enumerator)
end
it "uses the latest define iterator method" do
class StrangeEach
def each
yield :foo
end
end
enum = Enumerator.new(StrangeEach.new)
enum.to_a.should == [:foo]
class StrangeEach
def each
yield :bar
end
end
enum.to_a.should == [:bar]
end
end
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