add test

hutool-core/src/main/java/org/dromara/hutool/core/lang/ref/ReferenceUtil.java

@@ -81,7 +81,7 @@ public class ReferenceUtil {
 	}
 
 	/**
-	 * {@code null}全的解包获取原始对象
+	 * {@code null}安全的解包获取原始对象
 	 *
 	 * @param <T> 对象类型
 	 * @param obj Ref对象

hutool-core/src/test/java/org/dromara/hutool/core/map/reference/WeakConcurrentMapTest.java

@@ -0,0 +1,48 @@
+package org.dromara.hutool.core.map.reference;
+
+import org.dromara.hutool.core.thread.ThreadUtil;
+import org.dromara.hutool.core.util.RandomUtil;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class WeakConcurrentMapTest {
+	@Test
+	public void testWeakConcurrentMap() {
+		final WeakConcurrentMap<String, String> map = new WeakConcurrentMap<>();
+
+		// Test if the map is initially empty
+		assertTrue(map.isEmpty());
+
+		// Test if the map can store and retrieve values correctly
+		map.put("key1", "value1");
+		assertEquals("value1", map.get("key1"));
+
+		map.computeIfAbsent("key2", key -> "value2");
+		// Test if the map can handle concurrent modifications
+		new Thread(() -> {
+			map.put("key2", "value2");
+		}).start();
+
+		// Test if the map has correctly stored the value from the concurrent modification
+		assertEquals("value2", map.get("key2"));
+
+		assertTrue(map.containsKey("key1"));
+		assertTrue(map.containsKey("key2"));
+	}
+
+	@Test
+	void computeIfAbsentTest() {
+		final WeakConcurrentMap<String, String> map = new WeakConcurrentMap<>();
+
+		for (int i = 0; i < 1000; i++) {
+			ThreadUtil.execute(()->{
+				final String s = map.computeIfAbsent(RandomUtil.randomString(1), key -> "value1");
+				assertEquals("value1", s);
+			});
+		}
+
+		ThreadUtil.sleep(500);
+		assertFalse(map.isEmpty());
+	}
+}