How do you test code that uses CopyOnWriteArrayList?

To test code that uses CopyOnWriteArrayList, consider writing unit tests that validate the behavior of the list in concurrent scenarios. This involves adding, removing, and iterating through elements in a thread-safe manner while ensuring the expected outcomes. Below is an example demonstrating how to properly test the CopyOnWriteArrayList for concurrent modifications.


        <?php
        use PHPUnit\Framework\TestCase;
        use java\util\concurrent\CopyOnWriteArrayList;

        class CopyOnWriteArrayListTest extends TestCase {
            public function testConcurrentModification() {
                $list = new CopyOnWriteArrayList();
                $list->add("Item 1");
                $list->add("Item 2");

                // Starting a thread to remove an element while iterating
                $thread = new Thread(function() use ($list) {
                    sleep(1); // Ensure iteration starts first
                    $list->remove("Item 1");
                });

                $thread->start();

                // Iterating over the elements
                foreach ($list as $item) {
                    echo $item . "\n"; // Should print Item 1 and Item 2
                }

                $thread->join(); // Wait for the thread to finish
                $this->assertCount(1, $list); // Assert that Item 1 has been removed
            }
        }
        ?>

How do you test code that uses CopyOnWriteArrayList?

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How do you test code that uses CopyOnWriteArrayList?

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