1 files changed, 85 insertions, 0 deletions
diff --git a/test/syntax_error.ml b/test/syntax_error.ml
new file mode 100644
index 0000000..b907bc7
--- /dev/null
+++ b/test/syntax_error.ml
@@ -0,0 +1,85 @@
+module Parser = Qparser.Parser.Make (Qsp_syntax.Tree)
+module Ast = Qsp_syntax.Tree.Ast
+
+let _position = (Lexing.dummy_pos, Lexing.dummy_pos)
+
+type 'a report = { level : Qsp_syntax.Report.level; loc : 'a; message : string }
+[@@deriving eq, show]
+
+let report : Ast.pos report Alcotest.testable =
+  let equal = equal_report (fun _ _ -> true) in
+  let pp = pp_report (fun formater _ -> Format.fprintf formater "_position") in
+  Alcotest.testable pp equal
+
+let get_report :
+    (Ast.pos Syntax.location, Qsp_syntax.Report.t) result -> Ast.pos report =
+  function
+  | Ok _ -> failwith "No error"
+  | Error { level; loc; message } -> { level; loc; message }
+
+let _test_instruction : string -> Ast.pos report -> unit =
+ fun literal expected ->
+  let _location = Printf.sprintf {|# Location
+%s
+------- |} literal in
+  let actual = get_report @@ Syntax.parse _location and msg = literal in
+
+  Alcotest.(check' report ~msg ~expected ~actual)
+
+let else_column () =
+  _test_instruction
+    {|IF 1:
+      0
+      ELSE:
+      1
+      END|}
+    {
+      level = Error;
+      loc = _position;
+      message = "Unexpected operator after `ELSE`";
+    }
+
+let elseif_no_column () =
+  _test_instruction
+    {|IF 1:
+      0
+      ELSEIF 0
+      1
+      END|}
+    {
+      level = Error;
+      loc = _position;
+      message =
+        "The `ELIF` expression does not end properly. A `:` is expected before \
+         any instruction.";
+    }
+
+let unclosed_paren () =
+  _test_instruction
+    {|(1
+    |}
+    {
+      level = Error;
+      loc = _position;
+      message = "Unexpected '('. Did you forgot a function before ?";
+    }
+
+let act_no_column () =
+  _test_instruction
+    {|ACT 1
+      0
+      END|}
+    {
+      level = Error;
+      loc = _position;
+      message = "Invalid `ACT` label. You probably missed a ':'";
+    }
+
+let test =
+  ( "Syntax Errors",
+    [
+      Alcotest.test_case "else:" `Quick else_column;
+      Alcotest.test_case "elseif" `Quick elseif_no_column;
+      Alcotest.test_case "(1" `Quick unclosed_paren;
+      Alcotest.test_case "act 1" `Quick act_no_column;
+    ] )