Added yaml tests for multu chunks

Author: Samiul-TheSoccerFan

x-pack/plugin/inference/src/yamlRestTest/resources/rest-api-spec/test/inference/30_semantic_text_inference.yml

@@ -1159,3 +1159,36 @@ setup:
 
   - exists: hits.hits.0._source._inference_fields
   - not_exists: hits.hits.1._source._inference_fields
+
+---
+"Multi chunks skips empty input embedding generation":
+  - requires:
+      cluster_features: "semantic_text.handle_empty_input"
+      reason: skips generating embeddings when semantic_text field is contains empty or whitespace only input
+
+  - do:
+      index:
+        index: test-index
+        id: doc_1
+        body:
+          sparse_field: ["some test data", "    ", "now with chunks"]
+        refresh: true
+
+  - do:
+      search:
+        index: test-index
+        body:
+          fields: [ _inference_fields ]
+          query:
+            match_all: { }
+
+  - match: { hits.total.value: 1 }
+
+  - length: { hits.hits.0._source._inference_fields.sparse_field.inference.chunks: 1 }
+  - length: { hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field: 2 }
+  - exists: hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field.0.embeddings
+  - match: { hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field.0.start_offset: 0 }
+  - match: { hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field.0.end_offset: 14 }
+  - exists: hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field.1.embeddings
+  - match: { hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field.1.start_offset: 20 }
+  - match: { hits.hits.0._source._inference_fields.sparse_field.inference.chunks.sparse_field.1.end_offset: 35 }