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Add test cases for ObjectUtils#unwrapOptional #33618

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Add test cases for ObjectUtils#unwrapOptional #33618

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19 changes: 19 additions & 0 deletions spring-core/src/test/java/org/springframework/util/ObjectUtilsTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,7 @@
* @author Rick Evans
* @author Sam Brannen
* @author Hyunjin Choi
* @author Ngoc Nhan
*/
class ObjectUtilsTests {

Expand Down Expand Up @@ -1114,4 +1115,22 @@ private static String prefix(Class<?> clazz) {
}
}

@Test
void unwrapOptional() {

assertThat(ObjectUtils.unwrapOptional(null)).isNull();
assertThat(ObjectUtils.unwrapOptional(Optional.empty())).isNull();
assertThat(ObjectUtils.unwrapOptional(Optional.of("some value"))).isEqualTo("some value");

Optional<Optional<Object>> nestedEmptyOptional = Optional.of(Optional.empty());
assertThatIllegalArgumentException()
.isThrownBy(() -> ObjectUtils.unwrapOptional(nestedEmptyOptional))
.withMessage("Multi-level Optional usage not supported");

Optional<Optional<String>> nestedStringOptional = Optional.of(Optional.of("some value"));
assertThatIllegalArgumentException()
.isThrownBy(() -> ObjectUtils.unwrapOptional(nestedStringOptional))
.withMessage("Multi-level Optional usage not supported");
}

}