Update neural_query_enricher bwc tests (#652) (#679)

* update neural_query_enricher bwc

Signed-off-by: zhichao-aws <zhichaog@amazon.com>

* changelog

Signed-off-by: zhichao-aws <zhichaog@amazon.com>

* nit

Signed-off-by: zhichao-aws <zhichaog@amazon.com>

---------

Signed-off-by: zhichao-aws <zhichaog@amazon.com>
(cherry picked from commit 4b71e49)

Co-authored-by: zhichao-aws <zhichaog@amazon.com>

Author: opensearch-trigger-bot[bot]

CHANGELOG.md

@@ -21,4 +21,5 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Infrastructure
 ### Documentation
 ### Maintenance
+- Update bwc tests for neural_query_enricher neural_sparse search ([#652](https://github.com/opensearch-project/neural-search/pull/652))
 ### Refactoring

qa/restart-upgrade/src/test/java/org/opensearch/neuralsearch/bwc/NeuralQueryEnricherProcessorIT.java

@@ -54,6 +54,10 @@ public void testNeuralQueryEnricherProcessor_NeuralSparseSearch_E2EFlow() throws
                 getIndexNameForTest(),
                 Settings.builder().put("index.search.default_pipeline", SPARSE_SEARCH_PIPELINE_NAME)
             );
+            assertEquals(
+                search(getIndexNameForTest(), sparseEncodingQueryBuilderWithoutModelId, 1).get("hits"),
+                search(getIndexNameForTest(), sparseEncodingQueryBuilderWithModelId, 1).get("hits")
+            );
         } else {
             String modelId = null;
             try {

qa/rolling-upgrade/src/test/java/org/opensearch/neuralsearch/bwc/NeuralQueryEnricherProcessorIT.java

@@ -57,11 +57,20 @@ public void testNeuralQueryEnricherProcessor_NeuralSparseSearch_E2EFlow() throws
                     getIndexNameForTest(),
                     Settings.builder().put("index.search.default_pipeline", SPARSE_SEARCH_PIPELINE_NAME)
                 );
+                assertEquals(
+                    search(getIndexNameForTest(), sparseEncodingQueryBuilderWithoutModelId, 1).get("hits"),
+                    search(getIndexNameForTest(), sparseEncodingQueryBuilderWithModelId, 1).get("hits")
+                );
                 break;
             case MIXED:
                 sparseModelId = TestUtils.getModelId(getIngestionPipeline(SPARSE_INGEST_PIPELINE_NAME), SPARSE_ENCODING_PROCESSOR);
                 loadModel(sparseModelId);
                 sparseEncodingQueryBuilderWithModelId.modelId(sparseModelId);
+
+                assertEquals(
+                    search(getIndexNameForTest(), sparseEncodingQueryBuilderWithoutModelId, 1).get("hits"),
+                    search(getIndexNameForTest(), sparseEncodingQueryBuilderWithModelId, 1).get("hits")
+                );
                 break;
             case UPGRADED:
                 try {
@@ -117,11 +126,6 @@ public void testNeuralQueryEnricherProcessor_NeuralSearch_E2EFlow() throws Excep
                 loadModel(denseModelId);
                 neuralQueryBuilderWithModelId.modelId(denseModelId);
 
-                createSearchRequestProcessor(denseModelId, DENSE_SEARCH_PIPELINE_NAME);
-                updateIndexSettings(
-                    getIndexNameForTest(),
-                    Settings.builder().put("index.search.default_pipeline", DENSE_SEARCH_PIPELINE_NAME)
-                );
                 assertEquals(
                     search(getIndexNameForTest(), neuralQueryBuilderWithoutModelId, 1).get("hits"),
                     search(getIndexNameForTest(), neuralQueryBuilderWithModelId, 1).get("hits")