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describe :sizedqueue_enq, shared: true do
it "blocks if queued elements exceed size" do
q = @object.call(1)
q.size.should == 0
q.send(@method, :first_element)
q.size.should == 1
blocked_thread = Thread.new { q.send(@method, :second_element) }
sleep 0.01 until blocked_thread.stop?
q.size.should == 1
q.pop.should == :first_element
blocked_thread.join
q.size.should == 1
q.pop.should == :second_element
q.size.should == 0
end
it "raises a ThreadError if queued elements exceed size when not blocking" do
q = @object.call(2)
non_blocking = true
add_to_queue = -> { q.send(@method, Object.new, non_blocking) }
q.size.should == 0
add_to_queue.call
q.size.should == 1
add_to_queue.call
q.size.should == 2
add_to_queue.should raise_error(ThreadError)
end
it "interrupts enqueuing threads with ClosedQueueError when the queue is closed" do
q = @object.call(1)
q << 1
t = Thread.new {
-> { q.send(@method, 2) }.should raise_error(ClosedQueueError)
}
Thread.pass until q.num_waiting == 1
q.close
t.join
q.pop.should == 1
end
describe "with a timeout" do
ruby_version_is "3.2" do
it "returns self if the item was pushed in time" do
q = @object.call(1)
q << 1
t = Thread.new {
q.send(@method, 2, timeout: 1).should == q
}
Thread.pass until t.status == "sleep" && q.num_waiting == 1
q.pop
t.join
end
it "does nothing if the timeout is nil" do
q = @object.call(1)
q << 1
t = Thread.new {
q.send(@method, 2, timeout: nil).should == q
}
t.join(0.2).should == nil
q.pop
t.join
end
it "returns nil if no item is available in time" do
q = @object.call(1)
q << 1
t = Thread.new {
q.send(@method, 2, timeout: 0.1).should == nil
}
t.join
end
it "raise TypeError if timeout is not a valid numeric" do
q = @object.call(1)
-> { q.send(@method, 2, timeout: "1") }.should raise_error(
TypeError,
"no implicit conversion to float from string",
)
-> { q.send(@method, 2, timeout: false) }.should raise_error(
TypeError,
"no implicit conversion to float from false",
)
end
it "raise ArgumentError if non_block = true is passed too" do
q = @object.call(1)
-> { q.send(@method, 2, true, timeout: 1) }.should raise_error(
ArgumentError,
"can't set a timeout if non_block is enabled",
)
end
end
end
end
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