BAEL-5977 Code for the Throw Exception for Unexpected Input for Enum with Mapstruct article

mapstruct/pom.xml

@@ -73,7 +73,7 @@
     </build>
 
     <properties>
-        <org.mapstruct.version>1.5.3.Final</org.mapstruct.version>
+        <org.mapstruct.version>1.5.5.Final</org.mapstruct.version>
         <springframework.version>4.3.4.RELEASE</springframework.version>
         <lombok.mapstruct.binding.version>0.2.0</lombok.mapstruct.binding.version>
     </properties>

mapstruct/src/main/java/com/baeldung/enums/InputLevel.java

@@ -0,0 +1,7 @@
+package com.baeldung.enums;
+
+enum InputLevel {
+
+    LOW, MEDIUM, HIGH
+
+}

mapstruct/src/main/java/com/baeldung/enums/LevelMapper.java

@@ -0,0 +1,13 @@
+package com.baeldung.enums;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.MappingConstants;
+import org.mapstruct.ValueMapping;
+
+@Mapper
+interface LevelMapper {
+
+    @ValueMapping(source = MappingConstants.ANY_REMAINING, target = MappingConstants.THROW_EXCEPTION)
+    OutputLevel inputLevelToOutputLevel(InputLevel inputLevel);
+
+}

mapstruct/src/main/java/com/baeldung/enums/OutputLevel.java

@@ -0,0 +1,7 @@
+package com.baeldung.enums;
+
+enum OutputLevel {
+
+    LOW, HIGH
+
+}

mapstruct/src/test/java/com/baeldung/enums/LevelMapperUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.enums;
+
+import org.junit.jupiter.api.Test;
+import org.mapstruct.factory.Mappers;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class LevelMapperUnitTest {
+
+    LevelMapper levelMapper = Mappers.getMapper(LevelMapper.class);
+
+    @Test
+    void givenHighInputLevel_WhenInputLevelToOutputLevel_ThenHighOutputLevel() {
+        assertEquals(OutputLevel.HIGH, levelMapper.inputLevelToOutputLevel(InputLevel.HIGH));
+    }
+
+    @Test
+    void givenMediumInputLevel_WhenInputLevelToOutputLevel_ThenThrows() {
+        assertThrows(IllegalArgumentException.class, () -> levelMapper.inputLevelToOutputLevel(InputLevel.MEDIUM));
+    }
+
+    @Test
+    void givenLowInputLevel_WhenInputLevelToOutputLevel_ThenLowOutputLevel() {
+        assertEquals(OutputLevel.LOW, levelMapper.inputLevelToOutputLevel(InputLevel.LOW));
+    }
+
+}