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require_relative '../../../spec_helper'
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
context "when multiple arguments passed" do
it "raises an ArgumentError" do
ary = []
y = Enumerator::Yielder.new { |*x| ary << x }
-> {
y.<<(1, 2)
}.should raise_error(ArgumentError, /wrong number of arguments/)
end
end
end
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