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feat: utility method for padding list

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This commit is contained in:
easepan
2020-07-22 14:25:46 +08:00
parent d9f862ce67
commit 78729283e8
2 changed files with 20 additions and 25 deletions
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26
hutool-core/src/test/java/cn/hutool/core/collection/CollUtilTest.java
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@@ -21,28 +21,28 @@ public class CollUtilTest {
@Test
public void testPadLeft() {
List<Integer> srcList = CollUtil.newArrayList();
List<Integer> answerList = CollUtil.newArrayList(2, 1);
CollUtil.padLeft(srcList, 1, 1);
CollUtil.padLeft(srcList, 2, 2);
List<String> srcList = CollUtil.newArrayList();
List<String> answerList = CollUtil.newArrayList("a", "b");
CollUtil.padLeft(srcList, 1, "b");
CollUtil.padLeft(srcList, 2, "a");
Assert.assertEquals(srcList, answerList);
srcList = CollUtil.newArrayList(1, 2);
answerList = CollUtil.newArrayList(1, 2);
CollUtil.padLeft(srcList, 2, 1);
srcList = CollUtil.newArrayList("a", "b");
answerList = CollUtil.newArrayList("a", "b");
CollUtil.padLeft(srcList, 2, "a");
Assert.assertEquals(srcList, answerList);
srcList = CollUtil.newArrayList(3);
answerList = CollUtil.newArrayList(1, 1, 3);
CollUtil.padLeft(srcList, 3, 1);
srcList = CollUtil.newArrayList("c");
answerList = CollUtil.newArrayList("a", "a", "c");
CollUtil.padLeft(srcList, 3, "a");
Assert.assertEquals(srcList, answerList);
}
@Test
public void testPadRight() {
List<Integer> srcList = CollUtil.newArrayList(6);
List<Integer> answerList = CollUtil.newArrayList(6, 3, 3, 3, 3);
CollUtil.padRight(srcList, 5, 3);
List<String> srcList = CollUtil.newArrayList("a");
List<String> answerList = CollUtil.newArrayList("a", "b", "b", "b", "b");
CollUtil.padRight(srcList, 5, "b");
Assert.assertEquals(srcList, answerList);
}