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require_relative '../../spec_helper'
describe "Enumerator#+" do
before :each do
ScratchPad.record []
end
it "returns a chain of self and provided enumerators" do
one = Enumerator.new { |y| y << 1 }
two = Enumerator.new { |y| y << 2 }
three = Enumerator.new { |y| y << 3 }
chain = one + two + three
chain.should be_an_instance_of(Enumerator::Chain)
chain.each { |item| ScratchPad << item }
ScratchPad.recorded.should == [1, 2, 3]
end
it "calls #each on each argument" do
enum = Enumerator.new { |y| y << "one" }
obj1 = mock("obj1")
obj1.should_receive(:each).once.and_yield("two")
obj2 = mock("obj2")
obj2.should_receive(:each).once.and_yield("three")
chain = enum + obj1 + obj2
chain.each { |item| ScratchPad << item }
ScratchPad.recorded.should == ["one", "two", "three"]
end
end
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