Fix CsvTests

Author: carlosdelest

x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/lucene/LuceneQueryEvaluator.java

@@ -54,6 +54,7 @@ public record ShardConfig(Query query, IndexSearcher searcher) {}
     private final List<ShardState> perShardState;
 
     protected LuceneQueryEvaluator(BlockFactory blockFactory, ShardConfig[] shards) {
+        assert shards != null && shards.length > 0 : "LuceneQueryEvaluator requires shard information";
         this.blockFactory = blockFactory;
         this.shards = shards;
         this.perShardState = new ArrayList<>(Collections.nCopies(shards.length, null));

x-pack/plugin/esql/qa/testFixtures/src/main/resources/multi-match-function.csv-spec

@@ -70,7 +70,7 @@ required_capability: multi_match_function
 required_capability: full_text_functions_disjunctions_compute_engine
 
 from books 
-| where multi_match("lord", "title", "summary", {}) or length(title) > 130 
+| where multi_match("lord", "title", "summary", {"operator": "AND"}) or length(title) > 130 
 | keep book_no
 ;
 ignoreOrder: true

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/CsvTests.java

@@ -301,6 +301,10 @@ public final void test() throws Throwable {
                 "CSV tests cannot currently handle scoring that depends on Lucene",
                 testCase.requiredCapabilities.contains(EsqlCapabilities.Cap.METADATA_SCORE.capabilityName())
             );
+            assumeFalse(
+                "CSV tests cannot currently handle multi_match function that depends on Lucene",
+                testCase.requiredCapabilities.contains(EsqlCapabilities.Cap.MULTI_MATCH_FUNCTION.capabilityName())
+            );
 
             if (Build.current().isSnapshot()) {
                 assertThat(