[java-inspections] OverwrittenKey: test for no-fallthrough

GitOrigin-RevId: 85eac005b977087112685b13878fa5f72c59ef4d

java/java-tests/testData/inspection/overwrittenKey/OverwrittenKey.java

@@ -77,6 +77,20 @@ class OverwrittenKey {
     }
   }
 
+  void testNoFallthrough(Map<String, String> map, int id) {
+    switch(id) {
+      case 1:
+        map.put("foo", "bar");
+        break;
+      case 2:
+        map.put("foo", "baz");
+        break;
+      default:
+        map.put("foo", "qux");
+        break;
+    }
+  }
+
   void differentQualifiers(Set<Integer> set) {
     set.add(h1.KEY);
     set.add(h2.KEY);