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require File.expand_path('../../../../spec_helper', __FILE__)
require 'thread'
describe "Thread::SizedQueue#max" do
before :each do
@sized_queue = SizedQueue.new(5)
end
it "returns the size of the queue" do
@sized_queue.max.should == 5
end
end
describe "Thread::SizedQueue#max=" do
before :each do
@sized_queue = SizedQueue.new(5)
end
it "sets the size of the queue" do
@sized_queue.max.should == 5
@sized_queue.max = 10
@sized_queue.max.should == 10
end
it "does not remove items already in the queue beyond the maximum" do
@sized_queue.enq 1
@sized_queue.enq 2
@sized_queue.enq 3
@sized_queue.max = 2
(@sized_queue.size > @sized_queue.max).should be_true
@sized_queue.deq.should == 1
@sized_queue.deq.should == 2
@sized_queue.deq.should == 3
end
it "raises a TypeError when given a non-numeric value" do
lambda { @sized_queue.max = "foo" }.should raise_error(TypeError)
lambda { @sized_queue.max = Object.new }.should raise_error(TypeError)
end
it "raises an argument error when set to zero" do
@sized_queue.max.should == 5
lambda { @sized_queue.max = 0 }.should raise_error(ArgumentError)
@sized_queue.max.should == 5
end
it "raises an argument error when set to a negative number" do
@sized_queue.max.should == 5
lambda { @sized_queue.max = -1 }.should raise_error(ArgumentError)
@sized_queue.max.should == 5
end
end
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