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require File.expand_path('../../../../spec_helper', __FILE__)
describe "Enumerator::Yielder#<<" do
# TODO: There's some common behavior between yield and <<; move to a shared spec
it "yields the value to the block" do
ary = []
y = Enumerator::Yielder.new {|x| ary << x}
y << 1
ary.should == [1]
end
it "doesn't double-wrap Arrays" do
yields = []
y = Enumerator::Yielder.new {|args| yields << args }
y << [1]
yields.should == [[1]]
end
it "returns self" do
y = Enumerator::Yielder.new {|x| x + 1}
(y << 1).should equal(y)
end
it "requires multiple arguments" do
Enumerator::Yielder.instance_method(:<<).arity.should < 0
end
it "yields with passed arguments" do
yields = []
y = Enumerator::Yielder.new {|*args| yields << args }
y.<<(1, 2)
yields.should == [[1, 2]]
end
end
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