#235: Add a regression test for an enum implementing an interface

src/test/java/org/mapstruct/intellij/bugs/_235/EnumImplementingInterfaceTest.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at https://www.apache.org/licenses/LICENSE-2.0
+ */
+package org.mapstruct.intellij.bugs._235;
+
+import org.jetbrains.annotations.NotNull;
+import org.mapstruct.intellij.inspection.BaseInspectionTest;
+import org.mapstruct.intellij.inspection.MapstructReferenceInspection;
+
+/**
+ * @author Oliver Erhart
+ */
+public class EnumImplementingInterfaceTest extends BaseInspectionTest {
+
+    @Override
+    protected String getTestDataPath() {
+        return "testData/bugs/_235";
+    }
+
+    @NotNull
+    @Override
+    protected Class<MapstructReferenceInspection> getInspection() {
+        return MapstructReferenceInspection.class;
+    }
+
+    public void testEnumImplementingInterface() {
+        doTest();
+    }
+}

testData/bugs/_235/EnumImplementingInterface.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright MapStruct Authors.
+ *
+ * Licensed under the Apache License version 2.0, available at https://www.apache.org/licenses/LICENSE-2.0
+ */
+
+import org.mapstruct.Mapper;
+
+interface DbEnum<T> {
+    T getDbValue();
+}
+
+@Mapper
+abstract class MyMapper {
+
+    enum CheeseType implements DbEnum<Integer> {
+        BRIE(1),
+        ROQUEFORT(2);
+
+        private final Integer dbValue;
+
+        CheeseType(Integer dbValue) {
+            this.dbValue = dbValue;
+        }
+
+        @Override
+        public Integer getDbValue() {
+            return dbValue;
+        }
+    }
+
+    public enum OtherCheeseType {
+        BRIE,
+        ROQUEFORT
+    }
+
+    public abstract CheeseType map(OtherCheeseType cheese);
+}