AbstractQueryChangesTest: Add byMessageSubstring test

Bug: Issue 9146
Change-Id: I11d8f4da87a0e27e9117e2c0087cbaff5d185338
diff --git a/gerrit-server/src/test/java/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java b/gerrit-server/src/test/java/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
index 369901a..6ce0188 100644
--- a/gerrit-server/src/test/java/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
+++ b/gerrit-server/src/test/java/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
@@ -651,6 +651,14 @@
   }
 
   @Test
+  public void byMessageSubstring() throws Exception {
+    TestRepository<Repo> repo = createProject("repo");
+    RevCommit commit1 = repo.parseBody(repo.commit().message("https://gerrit.local").create());
+    Change change1 = insert(repo, newChangeForCommit(repo, commit1));
+    assertQuery("message:gerrit", change1);
+  }
+
+  @Test
   public void byLabel() throws Exception {
     accountManager.authenticate(AuthRequest.forUser("anotheruser"));
     TestRepository<Repo> repo = createProject("repo");