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Add tests for covering additional, important scenarios of CollUtil.

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qibinhang
2025-08-08 13:19:52 +08:00
parent 3e330f1c64
commit 8bfefbb9ba
1 changed files with 60 additions and 0 deletions
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60
hutool-core/src/test/java/cn/hutool/core/collection/CollUtilTest.java
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@@ -62,6 +62,25 @@ public class CollUtilTest {
assertEquals(srcList, answerList);
}
@Test
public void testPadLeft_NegativeMinLen_ShouldNotModifyList() {
List<String> list = CollUtil.newArrayList("a", "b", "c");
List<String> original = CollUtil.newArrayList("a", "b", "c");
CollUtil.padLeft(list, -5, "x");
assertEquals(original, list, "List should remain unchanged when minLen is negative");
}
@Test
public void testPadLeft_EmptyList_MinLenZero() {
List<String> list = CollUtil.newArrayList();
CollUtil.padLeft(list, 0, "x");
assertTrue(list.isEmpty(), "List should remain empty when minLen is 0");
}
@Test
public void testPadRight() {
final List<String> srcList = CollUtil.newArrayList("a");
@@ -211,6 +230,19 @@ public class CollUtilTest {
final List<String> r2 = CollUtil.subtractToList(map1.keySet(), map2.keySet());
assertEquals("[1]", r2.toString());
}
@Test
public void testSubtractWithDuplicates() {
Collection<String> coll1 = new ArrayList<>(Arrays.asList("a", "b", "b", "c"));
Collection<String> coll2 = Collections.singletonList("b");
Collection<String> result = CollUtil.subtract(coll1, coll2);
List<String> expected = Arrays.asList("a", "c");
List<String> resultList = new ArrayList<>(result);
Collections.sort(resultList);
Collections.sort(expected);
assertEquals(expected, resultList);
}
@Test
public void toMapListAndToListMapTest() {
@@ -825,6 +857,34 @@ public class CollUtilTest {
assertEquals(2, i);
}
@Test
public void lastIndexOf_NoMatchExists() {
List<String> list = CollUtil.newArrayList("a", "b", "c");
int idx = CollUtil.lastIndexOf(list, item -> item.equals("z"));
assertEquals(-1, idx);
}
@Test
public void lastIndexOf_MatcherIsNull_MatchAll() {
List<String> list = CollUtil.newArrayList("x", "y", "z");
int idx = CollUtil.lastIndexOf(list, null);
assertEquals(2, idx);
}
@Test
public void lastIndexOf_EmptyCollection() {
List<String> list = CollUtil.newArrayList();
int idx = CollUtil.lastIndexOf(list, item -> item != null);
assertEquals(-1, idx);
}
@Test
public void lastIndexOf_SingletonCollection_Match() {
List<String> list = CollUtil.newArrayList("foo");
int idx = CollUtil.lastIndexOf(list, item -> item.equals("foo"));
assertEquals(0, idx);
}
@Test
public void pageTest() {
final List<Dict> objects = CollUtil.newArrayList();