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测试不包含起始元素的迭代

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内存溢出
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
	at java.base/java.util.Arrays.copyOf(Arrays.java:3481)
	at java.base/java.util.ArrayList.grow(ArrayList.java:237)
	at java.base/java.util.ArrayList.grow(ArrayList.java:244)
	at java.base/java.util.ArrayList.add(ArrayList.java:454)
	at java.base/java.util.ArrayList.add(ArrayList.java:467)
	at cn.hutool.v7.core.lang.range.RangeTest.testIteratorWithoutIncludeStart(RangeTest.java:49)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
This commit is contained in:
zongze.lee 2025-11-06 02:45:40 +08:00
parent c0461c16f6
commit 56ffa92e5e
2 changed files with 42 additions and 22 deletions
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4
hutool-core/src/main/java/cn/hutool/v7/core/lang/range/Range.java
View File

@ -165,6 +165,10 @@ public class Range<T> implements Iterable<T>, Serializable {
* @return 下一步进 * @return 下一步进
*/ */
private T safeStep(final T base) { private T safeStep(final T base) {
// 添加边界检查
if (base == null || (base.equals(end))) {
return null;
}
final int index = this.index; final int index = this.index;
T next = null; T next = null;
try { try {

60
hutool-core/src/test/java/cn/hutool/v7/core/lang/range/RangeTest.java
View File

@ -22,13 +22,17 @@ import cn.hutool.v7.core.date.DateTime;
import cn.hutool.v7.core.date.DateUtil; import cn.hutool.v7.core.date.DateUtil;
import cn.hutool.v7.core.text.StrUtil; import cn.hutool.v7.core.text.StrUtil;
import org.junit.jupiter.api.Assertions; import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test; import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import java.util.Date; import java.util.Date;
import java.util.Iterator; import java.util.Iterator;
import java.util.List; import java.util.List;
import java.util.NoSuchElementException; import java.util.NoSuchElementException;
import static org.junit.jupiter.api.Assertions.assertEquals;
/** /**
* {@link Range} 单元测试 * {@link Range} 单元测试
* *
@ -36,6 +40,18 @@ import java.util.NoSuchElementException;
*/ */
public class RangeTest { public class RangeTest {
@Test
@DisplayName("测试不包含起始元素的迭代")
void testIteratorWithoutIncludeStart() {
Range<Integer> range = new Range<>(1, 5, (current, end, index) -> current + 1, false, true);
List<Integer> elements = new ArrayList<>();
for (Integer i : range) {
elements.add(i);
}
assertEquals(List.of(2, 3, 4, 5), elements);
}
@Test @Test
public void dateRangeTest() { public void dateRangeTest() {
final DateTime start = DateUtil.parse("2017-01-01"); final DateTime start = DateUtil.parse("2017-01-01");
@ -50,9 +66,9 @@ public class RangeTest {
final Iterator<DateTime> iterator = range.iterator(); final Iterator<DateTime> iterator = range.iterator();
Assertions.assertTrue(iterator.hasNext()); Assertions.assertTrue(iterator.hasNext());
Assertions.assertEquals(DateUtil.parse("2017-01-01"), iterator.next()); assertEquals(DateUtil.parse("2017-01-01"), iterator.next());
Assertions.assertTrue(iterator.hasNext()); Assertions.assertTrue(iterator.hasNext());
Assertions.assertEquals(DateUtil.parse("2017-01-02"), iterator.next()); assertEquals(DateUtil.parse("2017-01-02"), iterator.next());
Assertions.assertFalse(iterator.hasNext()); Assertions.assertFalse(iterator.hasNext());
} }
@ -75,11 +91,11 @@ public class RangeTest {
final StringBuilder sb = new StringBuilder(); final StringBuilder sb = new StringBuilder();
DateUtil.rangeConsume(start, end, DateField.DAY_OF_YEAR, a -> sb.append(DateTime.of(a).dayOfMonth()).append("#")); DateUtil.rangeConsume(start, end, DateField.DAY_OF_YEAR, a -> sb.append(DateTime.of(a).dayOfMonth()).append("#"));
Assertions.assertEquals("1#2#3#", sb.toString()); assertEquals("1#2#3#", sb.toString());
final StringBuilder sb2 = new StringBuilder(); final StringBuilder sb2 = new StringBuilder();
DateUtil.rangeConsume(null, null, DateField.DAY_OF_YEAR, a -> sb2.append(DateTime.of(a).dayOfMonth()).append("#")); DateUtil.rangeConsume(null, null, DateField.DAY_OF_YEAR, a -> sb2.append(DateTime.of(a).dayOfMonth()).append("#"));
Assertions.assertEquals(StrUtil.EMPTY, sb2.toString()); assertEquals(StrUtil.EMPTY, sb2.toString());
} }
@Test @Test
@ -90,11 +106,11 @@ public class RangeTest {
final DateRange range = DateUtil.range(start, end, DateField.MONTH); final DateRange range = DateUtil.range(start, end, DateField.MONTH);
final Iterator<DateTime> iterator = range.iterator(); final Iterator<DateTime> iterator = range.iterator();
Assertions.assertTrue(iterator.hasNext()); Assertions.assertTrue(iterator.hasNext());
Assertions.assertEquals(DateUtil.parse("2021-01-31"), iterator.next()); assertEquals(DateUtil.parse("2021-01-31"), iterator.next());
Assertions.assertTrue(iterator.hasNext()); Assertions.assertTrue(iterator.hasNext());
Assertions.assertEquals(DateUtil.parse("2021-02-28"), iterator.next()); assertEquals(DateUtil.parse("2021-02-28"), iterator.next());
Assertions.assertTrue(iterator.hasNext()); Assertions.assertTrue(iterator.hasNext());
Assertions.assertEquals(DateUtil.parse("2021-03-31"), iterator.next()); assertEquals(DateUtil.parse("2021-03-31"), iterator.next());
Assertions.assertFalse(iterator.hasNext()); Assertions.assertFalse(iterator.hasNext());
} }
@ -104,7 +120,7 @@ public class RangeTest {
final Iterator<Integer> iterator = range.iterator(); final Iterator<Integer> iterator = range.iterator();
Assertions.assertTrue(iterator.hasNext()); Assertions.assertTrue(iterator.hasNext());
Assertions.assertEquals(Integer.valueOf(1), iterator.next()); assertEquals(Integer.valueOf(1), iterator.next());
Assertions.assertFalse(iterator.hasNext()); Assertions.assertFalse(iterator.hasNext());
} }
@ -116,9 +132,9 @@ public class RangeTest {
// 测试包含开始和结束情况下步进为1的情况 // 测试包含开始和结束情况下步进为1的情况
DateRange range = DateUtil.range(start, end, DateField.DAY_OF_YEAR); DateRange range = DateUtil.range(start, end, DateField.DAY_OF_YEAR);
Iterator<DateTime> iterator = range.iterator(); Iterator<DateTime> iterator = range.iterator();
Assertions.assertEquals(iterator.next(), DateUtil.parse("2017-01-01")); assertEquals(iterator.next(), DateUtil.parse("2017-01-01"));
Assertions.assertEquals(iterator.next(), DateUtil.parse("2017-01-02")); assertEquals(iterator.next(), DateUtil.parse("2017-01-02"));
Assertions.assertEquals(iterator.next(), DateUtil.parse("2017-01-03")); assertEquals(iterator.next(), DateUtil.parse("2017-01-03"));
try { try {
iterator.next(); iterator.next();
Assertions.fail("已超过边界，下一个元素不应该存在！"); Assertions.fail("已超过边界，下一个元素不应该存在！");
@ -128,8 +144,8 @@ public class RangeTest {
// 测试多步进的情况 // 测试多步进的情况
range = new DateRange(start, end, DateField.DAY_OF_YEAR, 2); range = new DateRange(start, end, DateField.DAY_OF_YEAR, 2);
iterator = range.iterator(); iterator = range.iterator();
Assertions.assertEquals(DateUtil.parse("2017-01-01"), iterator.next()); assertEquals(DateUtil.parse("2017-01-01"), iterator.next());
Assertions.assertEquals(DateUtil.parse("2017-01-03"), iterator.next()); assertEquals(DateUtil.parse("2017-01-03"), iterator.next());
} }
@Test @Test
@ -140,9 +156,9 @@ public class RangeTest {
// 测试不包含开始结束时间的情况 // 测试不包含开始结束时间的情况
final DateRange range = new DateRange(start, end, DateField.DAY_OF_YEAR, 1, false, false); final DateRange range = new DateRange(start, end, DateField.DAY_OF_YEAR, 1, false, false);
final Iterator<DateTime> iterator = range.iterator(); final Iterator<DateTime> iterator = range.iterator();
Assertions.assertEquals(DateUtil.parse("2017-01-02"), iterator.next()); assertEquals(DateUtil.parse("2017-01-02"), iterator.next());
Assertions.assertEquals(DateUtil.parse("2017-01-03"), iterator.next()); assertEquals(DateUtil.parse("2017-01-03"), iterator.next());
Assertions.assertEquals(DateUtil.parse("2017-01-04"), iterator.next()); assertEquals(DateUtil.parse("2017-01-04"), iterator.next());
try { try {
iterator.next(); iterator.next();
Assertions.fail("不包含结束时间情况下，下一个元素不应该存在！"); Assertions.fail("不包含结束时间情况下，下一个元素不应该存在！");
@ -156,8 +172,8 @@ public class RangeTest {
final Date end = DateUtil.parse("2017-01-31"); final Date end = DateUtil.parse("2017-01-31");
final List<DateTime> rangeToList = DateUtil.rangeToList(start, end, DateField.DAY_OF_YEAR); final List<DateTime> rangeToList = DateUtil.rangeToList(start, end, DateField.DAY_OF_YEAR);
Assertions.assertEquals(DateUtil.parse("2017-01-01"), rangeToList.get(0)); assertEquals(DateUtil.parse("2017-01-01"), rangeToList.get(0));
Assertions.assertEquals(DateUtil.parse("2017-01-02"), rangeToList.get(1)); assertEquals(DateUtil.parse("2017-01-02"), rangeToList.get(1));
} }
@ -173,8 +189,8 @@ public class RangeTest {
final DateRange endRange = DateUtil.range(start1, end1, DateField.DAY_OF_YEAR); final DateRange endRange = DateUtil.range(start1, end1, DateField.DAY_OF_YEAR);
// 交集 // 交集
final List<DateTime> dateTimes = DateUtil.rangeContains(startRange, endRange); final List<DateTime> dateTimes = DateUtil.rangeContains(startRange, endRange);
Assertions.assertEquals(1, dateTimes.size()); assertEquals(1, dateTimes.size());
Assertions.assertEquals(DateUtil.parse("2017-01-31"), dateTimes.get(0)); assertEquals(DateUtil.parse("2017-01-31"), dateTimes.get(0));
} }
@Test @Test
@ -190,8 +206,8 @@ public class RangeTest {
// 差集 // 差集
final List<DateTime> dateTimes1 = DateUtil.rangeNotContains(startRange, endRange); final List<DateTime> dateTimes1 = DateUtil.rangeNotContains(startRange, endRange);
Assertions.assertEquals(1, dateTimes1.size()); assertEquals(1, dateTimes1.size());
Assertions.assertEquals(DateUtil.parse("2017-01-31"), dateTimes1.get(0)); assertEquals(DateUtil.parse("2017-01-31"), dateTimes1.get(0));
} }
} }