Add test

Author: luigidellaquila

x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/planner/QueryTranslatorFailTests.java

@@ -267,6 +267,11 @@ public void testSequenceWithTooLittleQueriesWithUntil() throws Exception {
         plan("sequence [any where true] [any where true] until [any where true]");
     }
 
+    public void testSequenceWithOnlyMissingEventsAndUntil() throws Exception {
+        String s = errorParsing("sequence with maxspan=1h ![process where true] until [process where true]");
+        assertEquals("1:2: A sequence requires a minimum of 2 queries (excluding UNTIL clause), found [1]", s);
+    }
+
     public void testSequenceWithIncorrectOption() throws Exception {
         EqlClientException e = expectThrows(EqlClientException.class, () -> plan("sequence [any where true] with repeat=123"));
         String msg = e.getMessage();