Test selector allocation/deallocation.

test/io/event/selector/allocation.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+# Released under the MIT License.
+# Copyright, 2021-2024, by Samuel Williams.
+
+require "io/event"
+
+IO::Event::Selector.constants.each do |name|
+	klass = IO::Event::Selector.const_get(name)
+
+	describe(klass, unique: name) do
+		it "can allocate and deallocate multiple times" do
+			pipes = 1000.times.collect{IO.pipe}
+
+			100000.times do
+				selector = subject.new(Fiber.current)
+
+				10.times do
+					Fiber.new do
+						selector.io_wait(Fiber.current, pipes.sample[1], IO::WRITABLE)
+					end.transfer
+				end
+
+				selector.select(0)
+			ensure
+				selector&.close
+			end
+
+			GC.start
+		end
+	end
+end