fix: serialize ConsequenceParams empty query (#766)

Author: aallam

algoliasearch-core/src/main/java/com/algolia/search/models/rules/ConsequenceQuery.java

@@ -1,7 +1,6 @@
 package com.algolia.search.models.rules;
 
 import com.algolia.search.Defaults;
-import com.algolia.search.util.AlgoliaUtils;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.core.JsonParser;
@@ -80,7 +79,7 @@ public void serialize(ConsequenceQuery value, JsonGenerator gen, SerializerProvi
      * Consequence query edits will override regular "query" - both can't be set at the same time
      * https://www.algolia.com/doc/api-reference/api-methods/save-rule/#method-param-query
      * */
-    if (!AlgoliaUtils.isNullOrEmptyWhiteSpace(value.getQueryString())) {
+    if (value.getQueryString() != null) {
       gen.writeString(value.getQueryString());
     } else {
       gen.writeStartObject();

algoliasearch-core/src/test/java/com/algolia/search/JacksonParserTest.java

@@ -1010,4 +1010,11 @@ void recommendations() throws JsonProcessingException {
     assertThat(recommendHit.getObjectID()).isEqualTo("D05927-8161-111");
     assertThat(recommendHit.getScore()).isEqualTo(32.72f);
   }
+
+  @Test
+  void consequenceParams_emptyQuery_nullEdits() throws JsonProcessingException {
+    ConsequenceParams params = new ConsequenceParams().setQuery("");
+    String json = Defaults.getObjectMapper().writeValueAsString(params);
+    assertThat(json).isEqualTo("{\"query\":\"\"}");
+  }
 }