fix(bug): change ObjectUtil.defaultIfXXX param type Supplier to Function

hutool-core/src/test/java/cn/hutool/core/util/ObjectUtilTest.java

@@ -15,15 +15,15 @@ import java.util.Map;
 public class ObjectUtilTest {
 
 	@Test
-	public void equalsTest(){
+	public void equalsTest() {
 		Object a = null;
 		Object b = null;
 		Assert.assertTrue(ObjectUtil.equals(a, b));
 	}
 
 	@Test
-	public void lengthTest(){
-		int[] array = new int[]{1,2,3,4,5};
+	public void lengthTest() {
+		int[] array = new int[]{1, 2, 3, 4, 5};
 		int length = ObjectUtil.length(array);
 		Assert.assertEquals(5, length);
 
@@ -36,8 +36,8 @@ public class ObjectUtilTest {
 	}
 
 	@Test
-	public void containsTest(){
-		int[] array = new int[]{1,2,3,4,5};
+	public void containsTest() {
+		int[] array = new int[]{1, 2, 3, 4, 5};
 
 		final boolean contains = ObjectUtil.contains(array, 1);
 		Assert.assertTrue(contains);
@@ -73,6 +73,14 @@ public class ObjectUtilTest {
 		Instant result2 = ObjectUtil.defaultIfNull(nullValue,
 				() -> DateUtil.parse(nullValue, DatePattern.NORM_DATETIME_PATTERN).toInstant(), Instant.now());
 		Assert.assertNotNull(result2);
+
+		Obj obj = new Obj();
+		Obj objNull = null;
+		String result3 = ObjectUtil.defaultIfNull(obj, (a) -> obj.doSomeThing(), "fail");
+		Assert.assertNotNull(result3);
+
+		String result4 = ObjectUtil.defaultIfNull(objNull, Obj::doSomeThing, "fail");
+		Assert.assertNotNull(result4);
 	}
 
 	@Test
@@ -88,14 +96,14 @@ public class ObjectUtilTest {
 	}
 
 	@Test
-	public void isBasicTypeTest(){
+	public void isBasicTypeTest() {
 		int a = 1;
 		final boolean basicType = ObjectUtil.isBasicType(a);
 		Assert.assertTrue(basicType);
 	}
 
 	@Test
-	public void isNotNullTest(){
+	public void isNotNullTest() {
 		String a = null;
 		Assert.assertFalse(ObjectUtil.isNotNull(a));
 	}