Fix tests and ignore expensive test

.github/workflows/check.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Test backend
         run: |
           cd backend
-          cargo test --verbose
+          cargo test --verbose -- --include-ignored
           cd sync_lib
           wasm-pack test --node
 

backend/reconcile/src/operation_transformation.rs

@@ -358,23 +358,26 @@ mod test {
         );
     }
 
+    #[ignore = "expensive to run, only run in CI"]
     #[test_matrix( [
         "pride_and_prejudice.txt",
         "romeo_and_juliet.txt",
         "room_with_a_view.txt",
         "kun_lu.txt",
-
+        "blns.txt"
     ],  [
         "pride_and_prejudice.txt",
         "romeo_and_juliet.txt",
         "room_with_a_view.txt",
-        "kun_lu.txt"
+        "kun_lu.txt",
+        "blns.txt"
     ],  [
         "pride_and_prejudice.txt",
         "romeo_and_juliet.txt",
         "room_with_a_view.txt",
-        "kun_lu.txt"
-    ], [0..10000, 10000..20000], [0..10000, 10000..20000], [0..10000, 10000..20000])]
+        "kun_lu.txt",
+        "blns.txt"
+    ], [0..10000, 10000..20000, 20000..50000], [0..10000, 10000..20000, 20000..50000], [0..10000, 10000..20000, 20000..50000])]
     fn test_merge_files_without_panic(
         file_name_1: &str,
         file_name_2: &str,