Improve index parameter testing for geo_point (#69414)

Author: iverase

server/src/test/java/org/elasticsearch/index/mapper/GeoPointFieldMapperTests.java

@@ -46,6 +46,7 @@ protected void registerParameters(ParameterChecker checker) throws IOException {
         checker.registerConflictCheck("null_value", b -> b.field("null_value", "41.12,-71.34"));
         checker.registerConflictCheck("doc_values", b -> b.field("doc_values", false));
         checker.registerConflictCheck("store", b -> b.field("store", true));
+        checker.registerConflictCheck("index", b -> b.field("index", false));
     }
 
     @Override
@@ -192,6 +193,14 @@ public void testIgnoreZValue() throws IOException {
         assertThat(ignoreZValue, equalTo(false));
     }
 
+    public void testIndexParameter() throws Exception {
+        DocumentMapper mapper = createDocumentMapper(fieldMapping(b -> b.field("type", "geo_point").field("index", false)));
+        Mapper fieldMapper = mapper.mappers().getMapper("field");
+        assertThat(fieldMapper, instanceOf(GeoPointFieldMapper.class));
+        boolean searchable = ((GeoPointFieldMapper)fieldMapper).fieldType().isSearchable();
+        assertThat(searchable, equalTo(false));
+    }
+
     public void testMultiField() throws Exception {
         DocumentMapper mapper = createDocumentMapper(fieldMapping(b -> {
             b.field("type", "geo_point").field("doc_values", false);