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!154 断言增加支持自定义异常

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Merge pull request !154 from webhua_323/v5-dev
This commit is contained in:
Looly 2020-08-11 12:45:32 +08:00 committed by Gitee
commit 686142442a
2 changed files with 32 additions and 0 deletions
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20
hutool-core/src/main/java/cn/hutool/core/lang/Assert.java
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@ -2,8 +2,11 @@ package cn.hutool.core.lang;
import java.util.Collection; import java.util.Collection;
import java.util.Map; import java.util.Map;
import java.util.function.Supplier;
import cn.hutool.core.collection.CollUtil; import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.lang.func.Func0;
import cn.hutool.core.lang.func.VoidFunc0;
import cn.hutool.core.util.ArrayUtil; import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.StrUtil; import cn.hutool.core.util.StrUtil;
@ -16,6 +19,23 @@ import cn.hutool.core.util.StrUtil;
*/ */
public class Assert { public class Assert {
/**
* 断言是否为真，如果为 {@code false} 抛出给定的异常<br>
*
* <pre class="code">
* Assert.isTrue(i &gt; 0, IllegalArgumentException::new);
* </pre>
*
* @param expression 布尔值
* @param supplier 指定断言不通过时抛出的异常
* @throws X if expression is {@code false}
*/
public static <X extends Throwable> void isTrue(boolean expression, Func0<? extends X> supplier) throws X {
if (false == expression) {
throw supplier.callWithRuntimeException();
}
}
/** /**
* 断言是否为真，如果为 {@code false} 抛出 {@code IllegalArgumentException} 异常<br> * 断言是否为真，如果为 {@code false} 抛出 {@code IllegalArgumentException} 异常<br>
* *

12
hutool-core/src/test/java/cn/hutool/core/lang/AssertTest.java
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@ -14,4 +14,16 @@ public class AssertTest {
String a = null; String a = null;
cn.hutool.core.lang.Assert.isNull(a); cn.hutool.core.lang.Assert.isNull(a);
} }
@Test(expected = IllegalArgumentException.class)
public void isTrueTest() {
int i = 0;
cn.hutool.core.lang.Assert.isTrue(i > 0, IllegalArgumentException::new);
}
@Test(expected = IndexOutOfBoundsException.class)
public void isTrueTest2() {
int i = -1;
cn.hutool.core.lang.Assert.isTrue(i >= 0, IndexOutOfBoundsException::new);
}
} }