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describe :sizedqueue_max, shared: true do
it "returns the size of the queue" do
q = @object.call(5)
q.max.should == 5
end
end
describe :sizedqueue_max=, shared: true do
it "sets the size of the queue" do
q = @object.call(5)
q.max.should == 5
q.max = 10
q.max.should == 10
end
it "does not remove items already in the queue beyond the maximum" do
q = @object.call(5)
q.enq 1
q.enq 2
q.enq 3
q.max = 2
(q.size > q.max).should be_true
q.deq.should == 1
q.deq.should == 2
q.deq.should == 3
end
it "raises a TypeError when given a non-numeric value" do
q = @object.call(5)
-> { q.max = "foo" }.should raise_error(TypeError)
-> { q.max = Object.new }.should raise_error(TypeError)
end
it "raises an argument error when set to zero" do
q = @object.call(5)
q.max.should == 5
-> { q.max = 0 }.should raise_error(ArgumentError)
q.max.should == 5
end
it "raises an argument error when set to a negative number" do
q = @object.call(5)
q.max.should == 5
-> { q.max = -1 }.should raise_error(ArgumentError)
q.max.should == 5
end
end
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