Prototype FallbackSyntheticSourceBlockLoader

Author: lkts

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

@@ -19,6 +19,7 @@
 import org.elasticsearch.logsdb.datageneration.DataGeneratorSpecification;
 import org.elasticsearch.logsdb.datageneration.DocumentGenerator;
 import org.elasticsearch.logsdb.datageneration.FieldType;
+import org.elasticsearch.logsdb.datageneration.Mapping;
 import org.elasticsearch.logsdb.datageneration.MappingGenerator;
 import org.elasticsearch.logsdb.datageneration.Template;
 import org.elasticsearch.logsdb.datageneration.datasource.DataSourceHandler;
@@ -112,6 +113,20 @@ private void runTest(Template template, String fieldName) throws IOException {
         assertEquals(expected, blockLoaderResult);
     }
 
+    public void testSynth() throws IOException {
+        Map<String, Object> raw = Map.of("type", "keyword", "doc_values", false, "store", false);
+        var mapping = new Mapping(Map.of("_doc", Map.of("properties", Map.of(fieldName, raw))), Map.of(fieldName, raw));
+        var mappingXContent = XContentBuilder.builder(XContentType.JSON.xContent()).map(mapping.raw());
+
+        var mapperService = createSytheticSourceMapperService(mappingXContent);
+
+        var fieldValue = generator.generateValue();
+
+        Object blockLoaderResult = setupAndInvokeBlockLoader(mapperService, fieldValue);
+        Object expected = expected(mapping.lookup().get(fieldName), fieldValue, true);
+        assertEquals(expected, blockLoaderResult);
+    }
+
     protected abstract Object expected(Map<String, Object> fieldMapping, Object value, boolean syntheticSource);
 
     private Object getFieldValue(Map<String, Object> document, String fieldName) {