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-rw-r--r--test/test_relational_engine.ml308
1 files changed, 308 insertions, 0 deletions
diff --git a/test/test_relational_engine.ml b/test/test_relational_engine.ml
index 737970b..8ba8226 100644
--- a/test/test_relational_engine.ml
+++ b/test/test_relational_engine.ml
@@ -1042,3 +1042,311 @@ let%test_unit "branching: full reconstruction from hash" =
assert (List.mem "Apple" names);
assert (List.mem "Banana" names);
assert (List.mem "Cherry" names))
+
+(* ============================================================================
+ Algebra Tests
+ ============================================================================ *)
+
+(* Helper: build a materialized tuple with int attributes *)
+let make_int_tuple relation pairs =
+ let attributes =
+ List.fold_left (fun acc (k, v) ->
+ Tuple.AttributeMap.add k { Attribute.value = Obj.repr (v : int) } acc)
+ Tuple.AttributeMap.empty pairs
+ in
+ (Tuple.Materialized { Tuple.relation; attributes } : Tuple.t)
+
+(* Helper: build a stored relation with one integer column and given values *)
+let stored_relation_with_ints storage db ~name ~attr values =
+ let schema = Schema.empty |> Schema.add attr "integer" in
+ let (db, rel) = match Manipulation.Memory.create_relation storage db ~name ~schema with
+ | Error _ -> assert false | Ok x -> x
+ in
+ let tuples = List.map (fun v ->
+ let attributes =
+ Tuple.AttributeMap.singleton attr { Attribute.value = Obj.repr (v : int) }
+ in
+ ({ Tuple.relation = name; attributes } : Tuple.materialized)
+ ) values in
+ let (db, rel, _) = match Manipulation.Memory.create_tuples storage db rel tuples with
+ | Error _ -> assert false | Ok x -> x
+ in
+ (db, rel)
+
+let%test_unit "algebra: const_relation single tuple" =
+ with_storage (fun storage ->
+ let rel = Algebra.Memory.const_relation
+ [ "x", Obj.repr (42 : int);
+ "y", Obj.repr (99 : int) ] in
+ match Algebra.Memory.materialize storage rel with
+ | Error _ -> assert false
+ | Ok [tup] ->
+ let x: int = Obj.obj (Tuple.AttributeMap.find "x" tup.Tuple.attributes).Attribute.value in
+ assert (x = 42)
+ | Ok _ -> assert false)
+
+let%test_unit "algebra: select_fn with predicate" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (_, rel) = stored_relation_with_ints storage db ~name:"nums" ~attr:"n" [1;2;3;4;5] in
+ let predicate = function
+ | Tuple.Materialized t ->
+ let v: int = Obj.obj (Tuple.AttributeMap.find "n" t.Tuple.attributes).Attribute.value in
+ v > 3
+ | _ -> false
+ in
+ match Algebra.Memory.select_fn storage predicate rel with
+ | Error _ -> assert false
+ | Ok result ->
+ match Algebra.Memory.materialize storage result with
+ | Error _ -> assert false
+ | Ok rows ->
+ assert (List.length rows = 2);
+ List.iter (fun t ->
+ let v: int = Obj.obj (Tuple.AttributeMap.find "n" t.Tuple.attributes).Attribute.value in
+ assert (v > 3)) rows)
+
+let%test_unit "algebra: project restricts schema" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let schema = Schema.empty |> Schema.add "a" "integer" |> Schema.add "b" "integer" in
+ let (db, rel) = match Manipulation.Memory.create_relation storage db ~name:"ab" ~schema with
+ | Error _ -> assert false | Ok x -> x
+ in
+ let attrs = Tuple.AttributeMap.empty
+ |> Tuple.AttributeMap.add "a" { Attribute.value = Obj.repr (1 : int) }
+ |> Tuple.AttributeMap.add "b" { Attribute.value = Obj.repr (2 : int) } in
+ let (_, rel, _) = match Manipulation.Memory.create_tuple storage db rel
+ { Tuple.relation = "ab"; attributes = attrs } with
+ | Error _ -> assert false | Ok x -> x
+ in
+ match Algebra.Memory.project storage ["a"] rel with
+ | Error _ -> assert false
+ | Ok projected ->
+ match Algebra.Memory.materialize storage projected with
+ | Error _ -> assert false
+ | Ok [t] ->
+ assert (Tuple.AttributeMap.mem "a" t.Tuple.attributes);
+ assert (not (Tuple.AttributeMap.mem "b" t.Tuple.attributes))
+ | Ok _ -> assert false)
+
+let%test_unit "algebra: rename changes attr names" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (_, rel) = stored_relation_with_ints storage db ~name:"r" ~attr:"x" [7] in
+ match Algebra.Memory.rename storage [("x", "y")] rel with
+ | Error _ -> assert false
+ | Ok renamed ->
+ match Algebra.Memory.materialize storage renamed with
+ | Error _ -> assert false
+ | Ok [t] ->
+ assert (not (Tuple.AttributeMap.mem "x" t.Tuple.attributes));
+ assert (Tuple.AttributeMap.mem "y" t.Tuple.attributes);
+ let v: int = Obj.obj (Tuple.AttributeMap.find "y" t.Tuple.attributes).Attribute.value in
+ assert (v = 7)
+ | Ok _ -> assert false)
+
+let%test_unit "algebra: equijoin merges matching tuples" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ (* left: {id=1, name="Alice"}, {id=2, name="Bob"} *)
+ let schema_l = Schema.empty |> Schema.add "id" "integer" |> Schema.add "name" "string" in
+ let (db, left) = match Manipulation.Memory.create_relation storage db ~name:"L" ~schema:schema_l with
+ | Error _ -> assert false | Ok x -> x
+ in
+ let make_left id name =
+ let attrs = Tuple.AttributeMap.empty
+ |> Tuple.AttributeMap.add "id" { Attribute.value = Obj.repr (id : int) }
+ |> Tuple.AttributeMap.add "name" { Attribute.value = Obj.repr (name : string) } in
+ ({ Tuple.relation = "L"; attributes = attrs } : Tuple.materialized)
+ in
+ let (db, left, _) = match Manipulation.Memory.create_tuples storage db left
+ [make_left 1 "Alice"; make_left 2 "Bob"] with
+ | Error _ -> assert false | Ok x -> x
+ in
+ (* right: {id=1, score=100}, {id=3, score=999} *)
+ let schema_r = Schema.empty |> Schema.add "id" "integer" |> Schema.add "score" "integer" in
+ let (db, right) = match Manipulation.Memory.create_relation storage db ~name:"R" ~schema:schema_r with
+ | Error _ -> assert false | Ok x -> x
+ in
+ let make_right id score =
+ let attrs = Tuple.AttributeMap.empty
+ |> Tuple.AttributeMap.add "id" { Attribute.value = Obj.repr (id : int) }
+ |> Tuple.AttributeMap.add "score" { Attribute.value = Obj.repr (score : int) } in
+ ({ Tuple.relation = "R"; attributes = attrs } : Tuple.materialized)
+ in
+ let (_, right, _) = match Manipulation.Memory.create_tuples storage db right
+ [make_right 1 100; make_right 3 999] with
+ | Error _ -> assert false | Ok x -> x
+ in
+ match Algebra.Memory.equijoin storage ["id"] left right with
+ | Error _ -> assert false
+ | Ok joined ->
+ match Algebra.Memory.materialize storage joined with
+ | Error _ -> assert false
+ | Ok rows ->
+ (* Only id=1 matches *)
+ assert (List.length rows = 1);
+ let t = List.hd rows in
+ let score: int = Obj.obj (Tuple.AttributeMap.find "score" t.Tuple.attributes).Attribute.value in
+ assert (score = 100))
+
+let%test_unit "algebra: equijoin empty match" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (db, left) = stored_relation_with_ints storage db ~name:"L" ~attr:"id" [1;2] in
+ let (_, right) = stored_relation_with_ints storage db ~name:"R" ~attr:"id" [9;8] in
+ match Algebra.Memory.equijoin storage ["id"] left right with
+ | Error _ -> assert false
+ | Ok joined ->
+ match Algebra.Memory.materialize storage joined with
+ | Error _ -> assert false
+ | Ok rows -> assert (List.length rows = 0))
+
+let%test_unit "algebra: union concatenates streams" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (db, r1) = stored_relation_with_ints storage db ~name:"A" ~attr:"n" [1;2] in
+ let (_, r2) = stored_relation_with_ints storage db ~name:"B" ~attr:"n" [3;4] in
+ match Algebra.Memory.union storage r1 r2 with
+ | Error _ -> assert false
+ | Ok unioned ->
+ match Algebra.Memory.materialize storage unioned with
+ | Error _ -> assert false
+ | Ok rows ->
+ assert (List.length rows = 4);
+ let vals = List.map (fun t ->
+ Obj.obj (Tuple.AttributeMap.find "n" t.Tuple.attributes).Attribute.value
+ ) rows in
+ assert (List.mem 1 vals);
+ assert (List.mem 2 vals);
+ assert (List.mem 3 vals);
+ assert (List.mem 4 vals))
+
+let%test_unit "algebra: diff removes right from left" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (db, r1) = stored_relation_with_ints storage db ~name:"A" ~attr:"n" [1;2;3] in
+ let (_, r2) = stored_relation_with_ints storage db ~name:"B" ~attr:"n" [2;3] in
+ match Algebra.Memory.diff storage r1 r2 with
+ | Error _ -> assert false
+ | Ok result ->
+ match Algebra.Memory.materialize storage result with
+ | Error _ -> assert false
+ | Ok rows ->
+ assert (List.length rows = 1);
+ let v: int = Obj.obj (Tuple.AttributeMap.find "n" (List.hd rows).Tuple.attributes).Attribute.value in
+ assert (v = 1))
+
+let%test_unit "algebra: take limits output" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (_, rel) = stored_relation_with_ints storage db ~name:"big" ~attr:"n" [10;20;30;40;50] in
+ match Algebra.Memory.take storage 3 rel with
+ | Error _ -> assert false
+ | Ok result ->
+ match Algebra.Memory.materialize storage result with
+ | Error _ -> assert false
+ | Ok rows -> assert (List.length rows = 3))
+
+(* ============================================================================
+ DRL Parser Tests
+ ============================================================================ *)
+
+let%test_unit "drl: parse Base" =
+ match Drl.Parser.of_string {|(Base "users")|} with
+ | Error _ -> assert false
+ | Ok (Drl.Ast.Base s) -> assert (s = "users")
+ | Ok _ -> assert false
+
+let%test_unit "drl: parse Const" =
+ match Drl.Parser.of_string {|(Const (("age" (Int 18))))|} with
+ | Error _ -> assert false
+ | Ok (Drl.Ast.Const [("age", Drl.Ast.Int 18)]) -> ()
+ | Ok _ -> assert false
+
+let%test_unit "drl: parse Join" =
+ match Drl.Parser.of_string {|(Join (id) (Base "L") (Base "R"))|} with
+ | Error _ -> assert false
+ | Ok (Drl.Ast.Join (["id"], Drl.Ast.Base "L", Drl.Ast.Base "R")) -> ()
+ | Ok _ -> assert false
+
+let%test_unit "drl: parse Select" =
+ let s = {|(Select (Const (("age" (Int 18)))) (Base "users"))|} in
+ match Drl.Parser.of_string s with
+ | Error _ -> assert false
+ | Ok (Drl.Ast.Select (Drl.Ast.Const _, Drl.Ast.Base "users")) -> ()
+ | Ok _ -> assert false
+
+(* ============================================================================
+ DRL Executor end-to-end Tests
+ ============================================================================ *)
+
+let%test_unit "drl: execute Base" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ let (db, _) = stored_relation_with_ints storage db ~name:"items" ~attr:"v" [10; 20] in
+ match Drl.Parser.of_string {|(Base "items")|} with
+ | Error _ -> assert false
+ | Ok query ->
+ match Drl.Executor.Memory.execute storage db query with
+ | Error _ -> assert false
+ | Ok rel ->
+ match Algebra.Memory.materialize storage rel with
+ | Error _ -> assert false
+ | Ok rows -> assert (List.length rows = 2))
+
+let%test_unit "drl: execute Select+Const" =
+ with_storage (fun storage ->
+ let db = match Manipulation.Memory.create_database storage ~name:"test_db" with
+ | Error _ -> assert false | Ok db -> db
+ in
+ (* users: {age=18, name="Alice"}, {age=25, name="Bob"} *)
+ let schema = Schema.empty |> Schema.add "age" "integer" |> Schema.add "name" "string" in
+ let (db, users) = match Manipulation.Memory.create_relation storage db ~name:"users" ~schema with
+ | Error _ -> assert false | Ok x -> x
+ in
+ let make_user age name =
+ let attrs = Tuple.AttributeMap.empty
+ |> Tuple.AttributeMap.add "age" { Attribute.value = Obj.repr (age : int) }
+ |> Tuple.AttributeMap.add "name" { Attribute.value = Obj.repr (name : string) } in
+ ({ Tuple.relation = "users"; attributes = attrs } : Tuple.materialized)
+ in
+ let (db, _, _) = match Manipulation.Memory.create_tuples storage db users
+ [make_user 18 "Alice"; make_user 25 "Bob"] with
+ | Error _ -> assert false | Ok x -> x
+ in
+ (* Query: select users where age = 18 *)
+ let s = {|(Select (Const (("age" (Int 18)))) (Base "users"))|} in
+ match Drl.Parser.of_string s with
+ | Error _ -> assert false
+ | Ok query ->
+ match Drl.Executor.Memory.execute storage db query with
+ | Error _ -> assert false
+ | Ok rel ->
+ match Algebra.Memory.materialize storage rel with
+ | Error _ -> assert false
+ | Ok rows ->
+ assert (List.length rows = 1);
+ let name_v: string =
+ Obj.obj (Tuple.AttributeMap.find "name" (List.hd rows).Tuple.attributes).Attribute.value
+ in
+ assert (name_v = "Alice"))
generated by cgit v1.2.3 (git 2.25.1) at 2026-11-04 13:07:00 +0000