fix code

hutool-core/src/test/java/cn/hutool/core/bean/Issue2683Test.java

@@ -0,0 +1,42 @@
+package cn.hutool.core.bean;
+
+import cn.hutool.core.collection.CollUtil;
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Collection;
+import java.util.EnumSet;
+
+/**
+ * EnumSet创建时无法自动获取其元素类型，通过传入方式获取
+ */
+public class Issue2683Test {
+
+	enum Version {
+		dev,
+		prod
+	}
+
+	@Data
+	public static class Vto {
+		EnumSet<Version> versions;
+	}
+
+
+	@Test
+	public void beanWithEnumSetTest() {
+		final Vto v1 = new Vto();
+		v1.setVersions(EnumSet.allOf(Version.class));
+		final Vto v2 = BeanUtil.copyProperties(v1, Vto.class);
+		Assert.assertNotNull(v2);
+		Assert.assertNotNull(v2.getVersions());
+	}
+
+	@Test
+	public void enumSetTest() {
+		final Collection<Version> objects = CollUtil.create(EnumSet.class, Version.class);
+		Assert.assertNotNull(objects);
+		Assert.assertTrue(EnumSet.class.isAssignableFrom(objects.getClass()));
+	}
+}