fixed unit test

Author: martijnvg

test/framework/src/main/java/org/elasticsearch/index/mapper/MapperTestCase.java

@@ -859,6 +859,7 @@ protected void assertFetch(MapperService mapperService, String field, Object val
                 .build(new IndexFieldDataCache.None(), new NoneCircuitBreakerService())
         );
         SearchExecutionContext searchExecutionContext = mock(SearchExecutionContext.class);
+        when(searchExecutionContext.getIndexSettings()).thenReturn(mapperService.getIndexSettings());
         when(searchExecutionContext.isSourceEnabled()).thenReturn(true);
         when(searchExecutionContext.sourcePath(field)).thenReturn(Set.of(field));
         when(searchExecutionContext.getForField(ft, fdt)).thenAnswer(inv -> fieldDataLookup(mapperService).apply(ft, () -> {