zhouxy108/hutool
1
0
Fork 0
mirror of https://gitee.com/chinabugotech/hutool.git synced 2025-07-21 15:09:48 +08:00
Code Issues Packages Projects Releases Wiki Activity

Opt修改

Browse Source 
* ofBlankAble入参和泛型改为String
* ofEmptyAble额外判断集合内元素全部为null的情况
* peek直接调用ifPresent
* peeks改为可爱的写法
- 移除名字太长的ifPresentOrElse
- 移除没有必要的orElseThrow(Function,String)
+ 新增orElseRun，对应一些不满足条件时调用的简单而又无返回值操作
This commit is contained in:
VampireAchao
2022-06-22 12:29:29 +08:00
parent 922d460fbe
commit d6118fe057
2 changed files with 40 additions and 116 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
hutool-core/src/test/java/cn/hutool/core/lang/OptTest.java
View File

@@ -9,6 +9,9 @@ import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;
import java.util.Map;
import java.util.HashMap;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@@ -45,19 +48,6 @@ public class OptTest {
Assert.assertTrue(isEmpty);
}
@Test
@Ignore
public void ifPresentOrElseTest() {
// 存在就打印对应的值，不存在则用{@code System.err.println}打印另一句字符串
Opt.ofNullable("Hello Hutool!").ifPresentOrElse(Console::log, () -> Console.error("Ops!Something is wrong!"));
Opt.empty().ifPresentOrElse(Console::log, () -> Console.error("Ops!Something is wrong!"));
// 拓展为支持链式调用
Opt.empty().ifPresentOrElse(Console::log, () -> Console.error("Ops!Something is wrong!"))
.ifPresentOrElse(Console::log, () -> Console.error("Ops!Something is wrong!"));
}
@Test
public void peekTest() {
final User user = new User();
@@ -127,11 +117,16 @@ public class OptTest {
Assert.assertNull(assignException);
}
@Test(expected = IllegalStateException.class)
public void orElseThrowTest3() {
// 获取一个不可能为空的值，否则抛出带自定义消息的自定义异常
final Object exceptionWithMessage = Opt.empty().orElseThrow(IllegalStateException::new, "Ops!Something is wrong!");
Assert.assertNull(exceptionWithMessage);
@Test
public void orElseRunTest() {
// 判断一个值是否为空，为空执行一段逻辑,否则执行另一段逻辑
Map<String, Integer> map = new HashMap<>();
final String key = "key";
map.put(key, 1);
Opt.ofNullable(map.get(key))
.ifPresent(v -> map.put(key, v + 1))
.orElseRun(() -> map.remove(key));
Assert.assertEquals((Object) 2, map.get(key));
}
@Test
@@ -155,14 +150,8 @@ public class OptTest {
// 现在，一个ofEmptyAble搞定
final List<String> hutool = Opt.ofEmptyAble(Collections.<String>emptyList()).orElseGet(() -> Collections.singletonList("hutool"));
Assert.assertEquals(past, hutool);
Assert.assertEquals(hutool, Collections.singletonList("hutool"));
}
@Test
public void mapOrElseTest() {
// 如果值存在就转换为大写，否则打印一句字符串，支持链式调用、转换为其他类型
final String hutool = Opt.ofBlankAble("hutool").mapOrElse(String::toUpperCase, () -> Console.log("yes")).mapOrElse(String::intern, () -> Console.log("Value is not present~")).get();
Assert.assertEquals("HUTOOL", hutool);
Assert.assertEquals(Collections.singletonList("hutool"), hutool);
Assert.assertTrue(Opt.ofEmptyAble(Arrays.asList(null, null, null)).isEmpty());
}
@SuppressWarnings({"MismatchedQueryAndUpdateOfCollection", "ConstantConditions"})