Added some test for syntax errors

3 files changed, 918 insertions, 831 deletions

diff --git a/test/qsp_parser_test.ml b/test/qsp_parser_test.ml
index 652ef75..cbbe91e 100644
--- a/test/qsp_parser_test.ml
+++ b/test/qsp_parser_test.ml
@@ -1,831 +1 @@
-module Parser = Qparser.Parser.Make (Qsp_syntax.Tree)
-module Tree = Qsp_syntax.Tree
-module Ast = Qsp_syntax.Tree.Ast
-module T = Ast
-
-let _position = (Lexing.dummy_pos, Lexing.dummy_pos)
-
-type 'a location = 'a * 'a Ast.statement list [@@deriving eq, show]
-
-(** Run the parser with the given expression and return the result *)
-let parse : string -> T.pos location =
- fun content ->
-  let lexing =
-    Sedlexing.Latin1.from_string content |> Qparser.Lexbuf.from_lexbuf
-  in
-  match Qparser.Analyzer.parse (module Qsp_syntax.Tree) lexing with
-  | Ok e -> e
-  | Error e ->
-      let msg = Format.asprintf "%a" Qsp_syntax.Report.pp e in
-      raise (Failure msg)
-
-let location : T.pos location Alcotest.testable =
-  let equal = equal_location (fun _ _ -> true) in
-  let pp =
-    pp_location (fun formater _ -> Format.fprintf formater "_position")
-  in
-  Alcotest.testable pp equal
-
-let test_empty_location () =
-  let expected = (_position, [])
-  and actual = parse {|# Location
-------- |}
-  and msg = "Empty location" in
-
-  Alcotest.(check' location ~msg ~expected ~actual)
-
-let test_location_without_database () =
-  let expected = (_position, [])
-  and actual = parse {|# $Location
-------- |}
-  and msg = "Location without database" in
-
-  let () = Alcotest.(check' location ~msg ~expected ~actual) in
-
-  let actual = parse {|# !Location
-------- |} in
-  let () = Alcotest.(check' location ~msg ~expected ~actual) in
-
-  let actual = parse {|# ^Location
-------- |} in
-  Alcotest.(check' location ~msg ~expected ~actual)
-
-let _test_instruction : string -> Ast.pos Ast.statement list -> unit =
- fun literal expected ->
-  let expected = (_position, expected)
-  and _location = Printf.sprintf {|# Location
-%s
-------- |} literal in
-  let actual = parse _location and msg = literal in
-
-  Alcotest.(check' location ~msg ~expected ~actual)
-
-let test_numeric_expression () =
-  _test_instruction "123" [ Expression (Integer (_position, "123")) ]
-
-let test_negative_numeric_expression () =
-  _test_instruction "-123"
-    [ Expression (Op (_position, Neg, Integer (_position, "123"))) ]
-
-let test_negative_numeric_expression2 () =
-  let index = None in
-  let var = { Ast.pos = _position; name = "CURTIMESUN"; index } in
-  _test_instruction "-(780-CurTimeSun)"
-    Ast.
-      [
-        Expression
-          (Op
-             ( _position,
-               Neg,
-               BinaryOp (_position, Minus, Integer (_position, "780"), Ident var)
-             ));
-      ]
-
-let test_str_variable () =
-  let index = None in
-  let var = { Ast.pos = _position; name = "$VALUE"; index } in
-  _test_instruction "$value" [ Expression (Ident var) ]
-
-let test_variable () =
-  let index = None in
-  let var = { Ast.pos = _position; name = "VALUE"; index } in
-  _test_instruction "value" [ Expression (Ident var) ]
-
-let test_indexed_variable () =
-  let index = Some Ast.(Integer (_position, "1")) in
-  let var = { Ast.pos = _position; name = "VALUE"; index } in
-  _test_instruction "value[1]" [ Expression (Ident var) ]
-
-let test_let_literal () =
-  let index = None in
-  let var = { Ast.pos = _position; name = "VALUE"; index } in
-  _test_instruction "let value = '123'"
-    Ast.[ Declaration (_position, var, Eq', Literal (_position, "123")) ]
-
-let test_set_array_append () =
-  let var = { Ast.pos = _position; name = "$VALUE"; index = None } in
-  _test_instruction "set $value[] = ''"
-    Ast.[ Declaration (_position, var, Eq', Literal (_position, "")) ]
-
-let test_direct_assignation () =
-  let index = None in
-  let var = { T.pos = _position; name = "VALUE"; index } in
-  _test_instruction "value = '123'"
-    Ast.[ Declaration (_position, var, Eq', Literal (_position, "123")) ]
-
-let test_command_assignation () =
-  let index = None in
-  let st_1 = { Ast.pos = _position; name = "ST_1"; index } in
-  _test_instruction "st_1 = input 'Enter the amount'"
-    Ast.
-      [
-        Declaration
-          ( _position,
-            st_1,
-            Eq',
-            Function
-              (_position, Input, [ Literal (_position, "Enter the amount") ]) );
-      ]
-
-let test_assignation2 () =
-  let index = None in
-  let var = { Ast.pos = _position; name = "VALUE"; index } in
-  _test_instruction "set value += 123"
-    Ast.[ Declaration (_position, var, Inc, Integer (_position, "123")) ]
-
-let test_multilie_literal () =
-  let index = None in
-  let var = { Ast.pos = _position; name = "VALUE"; index } in
-  _test_instruction {| 
-  value = {
-$a = '123'
-}|}
-    Ast.
-      [
-        Declaration (_position, var, Eq', Literal (_position, "\n$a = '123'\n"));
-      ]
-
-let test_nested_literal () =
-  _test_instruction
-    {| 
-  value = {
-
-      {
-
-      }
-}|}
-    [
-      Ast.Declaration
-        ( _position,
-          { Ast.pos = _position; name = "VALUE"; index = None },
-          Qsp_syntax.T.Eq',
-          Ast.Literal (_position, "\n\n      {\n\n      }\n") );
-    ]
-
-let test_concat_literal () =
-  _test_instruction {| 
-  '123'
-  +'456'
-|}
-    [
-      Ast.Expression (Ast.Literal (_position, "123"));
-      Ast.Expression
-        (Ast.Op (_position, Qsp_syntax.T.Add, Ast.Literal (_position, "456")));
-    ]
-
-let test_literal () =
-  _test_instruction "'123'" [ Expression (Literal (_position, "123")) ]
-
-let test_qutoted_literal () =
-  _test_instruction "'12''3'" [ Expression (Literal (_position, "12'3")) ]
-
-let test_multiline1 () =
-  let content = {|
-apples  = 5
-pears   = 10
-|} in
-
-  let index = None in
-  let apples = { Ast.pos = _position; name = "APPLES"; index }
-  and pears = { Ast.pos = _position; name = "PEARS"; index }
-  and value_5 = Ast.Integer (_position, "5")
-  and value_10 = Ast.Integer (_position, "10") in
-  _test_instruction content
-    Ast.
-      [
-        Declaration (_position, apples, Eq', value_5);
-        Declaration (_position, pears, Eq', value_10);
-      ]
-
-let test_multiline2 () =
-  let content = "apples = 5 & pears = 10" in
-
-  let index = None in
-  let apples = { Ast.pos = _position; name = "APPLES"; index }
-  and pears = { Ast.pos = _position; name = "PEARS"; index }
-  and value_5 = Ast.Integer (_position, "5")
-  and value_10 = Ast.Integer (_position, "10") in
-  _test_instruction content
-    [
-      Declaration (_position, apples, Eq', value_5);
-      Declaration (_position, pears, Eq', value_10);
-    ]
-
-let test_equality () =
-  let content = "apples = 5 = pears" in
-  let index = None in
-  let apples = { Ast.pos = _position; name = "APPLES"; index }
-  and pears = { Ast.pos = _position; name = "PEARS"; index }
-  and value_5 = Ast.Integer (_position, "5") in
-  _test_instruction content
-    [
-      Declaration
-        (_position, apples, Eq', BinaryOp (_position, Eq, value_5, Ident pears));
-    ]
-
-let test_plus () =
-  let content = {|
-apples = 5 + pears
-|} in
-  let index = None in
-  let apples = { Ast.pos = _position; name = "APPLES"; index }
-  and pears = { Ast.pos = _position; name = "PEARS"; index }
-  and value_5 = Ast.Integer (_position, "5") in
-  _test_instruction content
-    [
-      Declaration
-        ( _position,
-          apples,
-          Eq',
-          BinaryOp (_position, Plus, value_5, Ident pears) );
-    ]
-
-let test_plus_litt () =
-  let content = {|
-'five'+ pears
-|} in
-  let index = None in
-  let pears = { Ast.pos = _position; name = "PEARS"; index } in
-  _test_instruction content
-    [
-      Ast.(
-        Expression
-          (BinaryOp (_position, Plus, Literal (_position, "five"), Ident pears)));
-    ]
-
-let test_concat () =
-  let content = {|
-$firstName + ' ' + $lastName
-|} in
-  _test_instruction content
-    [
-      Tree.Ast.Expression
-        (Tree.Ast.BinaryOp
-           ( _position,
-             Plus,
-             Tree.Ast.BinaryOp
-               ( _position,
-                 Plus,
-                 Tree.Ast.Ident
-                   {
-                     Tree.Ast.pos = _position;
-                     name = "$FIRSTNAME";
-                     index = None;
-                   },
-                 Tree.Ast.Literal (_position, " ") ),
-             Tree.Ast.Ident
-               { Tree.Ast.pos = _position; name = "$LASTNAME"; index = None } ));
-    ]
-
-let test_comment () = _test_instruction "! Comment" [ Comment _position ]
-
-let test_comment2 () =
-  let index = None in
-  let a = { Ast.pos = _position; name = "A"; index }
-  and value_0 = Ast.Integer (_position, "0") in
-  _test_instruction "a = 0 &! Comment"
-    Ast.[ Declaration (_position, a, Eq', value_0); Comment _position ]
-
-let test_comment3 () = _test_instruction {|!!1234
-  |} [ Comment _position ]
-
-(** The exclamation mark here is an operation and not a comment *)
-let test_comment4 () =
-  let index = None in
-  let a = { Ast.pos = _position; name = "A"; index }
-  and value_0 = Ast.Integer (_position, "0") in
-  _test_instruction "a = rand(0, 1) ! 0"
-    [
-      Ast.(
-        Declaration
-          ( _position,
-            a,
-            Eq',
-            BinaryOp
-              ( _position,
-                Neq,
-                Function
-                  ( _position,
-                    Rand,
-                    [ Integer (_position, "0"); Integer (_position, "1") ] ),
-                value_0 ) ));
-    ]
-
-let test_comment5 () =
-  _test_instruction "a = rand() &! Comment"
-    [
-      Ast.Declaration
-        ( _position,
-          { Ast.pos = _position; name = "A"; index = None },
-          Qsp_syntax.T.Eq',
-          Ast.Function (_position, Rand, []) );
-      Ast.Comment _position;
-    ]
-
-let test_comment6 () =
-  _test_instruction
-    "gs 'stat' &!! It should be here, because some of the strigs have to be \
-     initialized"
-    [
-      Ast.Call (_position, "GOSUB", [ Ast.Literal (_position, "stat") ]);
-      Ast.Comment _position;
-    ]
-
-let test_long_comment () =
-  _test_instruction
-    {| !'this part of the comment is inside
-single quotes' but "this is still part
-of the same comment because sometimes
-life is unfair." Oh yeah, {curly brackets
-also count}. This is still the same comment. |}
-    [ Comment _position ]
-
-(** This test ensure that the unary operator is applied to the whole expression
- *)
-let test_precedence () =
-  let index = None in
-  let x = Ast.Ident { Ast.pos = _position; name = "X"; index }
-  and y = Ast.Ident { Ast.pos = _position; name = "Y"; index } in
-  _test_instruction "no x = y"
-    Ast.[ Expression (Op (_position, No, BinaryOp (_position, Eq, x, y))) ]
-
-(** This test ensure that a ! is not considered as a comment in an 
-    expression *)
-let test_precedence2 () =
-  let index = None in
-  let x = { Ast.pos = _position; name = "X"; index }
-  and y = Ast.Ident { Ast.pos = _position; name = "Y"; index } in
-  _test_instruction "x = y ! 0"
-    Ast.
-      [
-        Declaration
-          ( _position,
-            x,
-            Eq',
-            BinaryOp (_position, Neq, y, Integer (_position, "0")) );
-      ]
-
-let test_if () =
-  let index = Some Ast.(Integer (_position, "0")) in
-  let args = Ast.(Ident { pos = _position; name = "$ARGS"; index })
-  and expr1 = Ast.(Literal (_position, "blockA"))
-  and expr2 = Ast.(Expression (Literal (_position, "You are in block A"))) in
-  _test_instruction {| if $ARGS[0] = 'blockA':
-  'You are in block A'
-end |}
-    Ast.
-      [
-        If
-          {
-            loc = _position;
-            then_ = (_position, BinaryOp (_position, Eq, args, expr1), [ expr2 ]);
-            elifs = [];
-            else_ = [];
-          };
-      ]
-
-let test_if2 () =
-  let index = Some Ast.(Integer (_position, "0")) in
-  let args = Ast.(Ident { pos = _position; name = "$ARGS"; index })
-  and expr1 = Ast.(Literal (_position, "blockA"))
-  and expr2 = Ast.(Expression (Literal (_position, "You are in block A"))) in
-  _test_instruction {| if $ARGS[0] = 'blockA':
-  'You are in block A'
-end if|}
-    Ast.
-      [
-        If
-          {
-            loc = _position;
-            then_ = (_position, BinaryOp (_position, Eq, args, expr1), [ expr2 ]);
-            elifs = [];
-            else_ = [];
-          };
-      ]
-
-let test_if_chained () =
-  let value_0 = Ast.Integer (_position, "0") in
-  _test_instruction {| if 0:
-  0
-end &! -- |}
-    Ast.
-      [
-        If
-          {
-            loc = _position;
-            then_ = (_position, value_0, [ Expression value_0 ]);
-            elifs = [];
-            else_ = [];
-          };
-        Comment _position;
-      ]
-
-let test_if_equality () =
-  _test_instruction {|
-if 0 = 0:
-end &! --
-|}
-    [
-      Ast.If
-        {
-          loc = _position;
-          then_ =
-            ( _position,
-              Ast.BinaryOp
-                ( _position,
-                  Qsp_syntax.T.Eq,
-                  Ast.Integer (_position, "0"),
-                  Ast.Integer (_position, "0") ),
-              [] );
-          elifs = [];
-          else_ = [];
-        };
-      Ast.Comment _position;
-    ]
-
-let test_if_inline () =
-  let value_0 = Ast.Integer (_position, "0") in
-  _test_instruction "if 0: 0 else 0"
-    Ast.
-      [
-        If
-          {
-            loc = _position;
-            then_ = (_position, value_0, [ Expression value_0 ]);
-            elifs = [];
-            else_ = [ Expression value_0 ];
-          };
-      ]
-
-let test_if_inline_comment () =
-  let value_0 = Ast.Integer (_position, "0") in
-  _test_instruction "if 0: 0 else 0 &! comment "
-    Ast.
-      [
-        If
-          {
-            loc = _position;
-            then_ = (_position, value_0, [ Expression value_0 ]);
-            elifs = [];
-            else_ = [ Expression value_0 ];
-          };
-        Comment _position;
-      ]
-
-let test_if_inline_comment2 () =
-  _test_instruction "if 0: 1 & !! Comment"
-    [
-      Ast.If
-        {
-          loc = _position;
-          then_ =
-            ( _position,
-              Ast.Integer (_position, "0"),
-              [
-                Ast.Expression (Ast.Integer (_position, "1"));
-                Ast.Comment _position;
-              ] );
-          elifs = [];
-          else_ = [];
-        };
-    ]
-
-let test_if_inline_act () =
-  _test_instruction "if 1 and hour >= 8: minut += 1 & act 'go': gt 'go'"
-    [
-      Ast.If
-        {
-          loc = _position;
-          then_ =
-            ( _position,
-              Ast.BinaryOp
-                ( _position,
-                  Qsp_syntax.T.And,
-                  Ast.Integer (_position, "1"),
-                  Ast.BinaryOp
-                    ( _position,
-                      Qsp_syntax.T.Gte,
-                      Ast.Ident
-                        { Ast.pos = _position; name = "HOUR"; index = None },
-                      Ast.Integer (_position, "8") ) ),
-              [
-                Ast.Declaration
-                  ( _position,
-                    { Ast.pos = _position; name = "MINUT"; index = None },
-                    Qsp_syntax.T.Inc,
-                    Ast.Integer (_position, "1") );
-                Ast.Act
-                  {
-                    loc = _position;
-                    label = Ast.Literal (_position, "go");
-                    statements =
-                      [
-                        Ast.Call
-                          (_position, "GOTO", [ Ast.Literal (_position, "go") ]);
-                      ];
-                  };
-              ] );
-          elifs = [];
-          else_ = [];
-        };
-    ]
-
-let test_if_inline_act2 () =
-  _test_instruction "if 1: act 'go': gt 'go' &! comment "
-    [
-      Ast.If
-        {
-          loc = _position;
-          then_ =
-            ( _position,
-              Ast.Integer (_position, "1"),
-              [
-                Ast.Act
-                  {
-                    loc = _position;
-                    label = Ast.Literal (_position, "go");
-                    statements =
-                      [
-                        Ast.Call
-                          (_position, "GOTO", [ Ast.Literal (_position, "go") ]);
-                        Ast.Comment _position;
-                      ];
-                  };
-              ] );
-          elifs = [];
-          else_ = [];
-        };
-    ]
-
-let test_precedence3 () =
-  let index = Some Ast.(Integer (_position, "0")) in
-  let args = Ast.(Ident { pos = _position; name = "$ARGS"; index })
-  and expr1 = Ast.(Literal (_position, "blockA"))
-  and expr2 = Ast.(Expression (Literal (_position, "You are in block A")))
-  and expr3 = Ast.(Expression (Integer (_position, "0"))) in
-  _test_instruction {| if $ARGS[0] = 'blockA': 'You are in block A' & 0|}
-    Ast.
-      [
-        If
-          {
-            loc = _position;
-            then_ =
-              ( _position,
-                BinaryOp (_position, Eq, args, expr1),
-                [ expr2; expr3 ] );
-            elifs = [];
-            else_ = [];
-          };
-      ]
-
-let test_gs () =
-  _test_instruction "gs '123'"
-    [ Ast.(Call (_position, "GOSUB", [ Literal (_position, "123") ])) ]
-
-let test_gt () =
-  _test_instruction "gt $curloc"
-    [
-      Ast.Call
-        ( _position,
-          "GOTO",
-          [ Ast.Ident { Ast.pos = _position; name = "$CURLOC"; index = None } ]
-        );
-    ]
-
-let test_nl () =
-  _test_instruction "*NL 'It'"
-    [ Ast.Call (_position, "*NL", [ Ast.Literal (_position, "It") ]) ]
-
-let test_function () =
-  _test_instruction "iif(123, 1, 0)"
-    [
-      Ast.(
-        Expression
-          (Function
-             ( _position,
-               Iif,
-               [
-                 Integer (_position, "123");
-                 Integer (_position, "1");
-                 Integer (_position, "0");
-               ] )));
-    ]
-
-(** Include a space before the parameters *)
-let test_function2 () =
-  _test_instruction "rand (0, 1)"
-    [
-      Ast.(
-        Expression
-          (Function
-             ( _position,
-               Rand,
-               [ Integer (_position, "0"); Integer (_position, "1") ] )));
-    ]
-
-let test_precedence4 () =
-  _test_instruction "trim()" Ast.[ Expression (Function (_position, Trim, [])) ]
-
-(** This should not be a keyword without arguments, followed by an expression *)
-let test_precedence5 () =
-  _test_instruction "clear()" Ast.[ Call (_position, "CLEAR", []) ]
-
-let test_precedence6 () =
-  _test_instruction "(1 = 0 and 2 ! 3)"
-    [
-      Ast.Expression
-        (Ast.BinaryOp
-           ( _position,
-             And,
-             Ast.BinaryOp
-               ( _position,
-                 Eq,
-                 Ast.Integer (_position, "1"),
-                 Ast.Integer (_position, "0") ),
-             Ast.BinaryOp
-               ( _position,
-                 Neq,
-                 Ast.Integer (_position, "2"),
-                 Ast.Integer (_position, "3") ) ));
-    ]
-
-(** An identifier cannot start by a number *0 is a product and not an
-    identifier *)
-let test_operator () =
-  let index = None in
-  let a = { Ast.pos = _position; name = "A"; index }
-  and value_0 = Ast.Integer (_position, "0") in
-  _test_instruction "a *0"
-    Ast.[ Expression (BinaryOp (_position, Product, Ident a, value_0)) ]
-
-let test_operator2 () =
-  let value_0 = Ast.Integer (_position, "0") in
-  _test_instruction "0 *rand()"
-    Ast.
-      [
-        Expression
-          (BinaryOp (_position, Product, value_0, Function (_position, Rand, [])));
-      ]
-
-let test_dyneval () =
-  _test_instruction "dyneval ''"
-    [
-      Ast.Expression
-        (Ast.Function (_position, Dyneval, [ Ast.Literal (_position, "") ]));
-    ]
-
-(** The parens after input are considered as arguments for the function, not a
-    following expression. 
-
-    This expression is a boolean.
-*)
-let test_input () =
-  _test_instruction "( input('') = '' )"
-    [
-      Tree.Ast.Expression
-        (Tree.Ast.BinaryOp
-           ( _position,
-             Eq,
-             Tree.Ast.Function
-               (_position, Input, [ Tree.Ast.Literal (_position, "") ]),
-             Tree.Ast.Literal (_position, "") ));
-    ]
-
-let test_mutiple_inline_ifs () =
-  _test_instruction "if 1 > 0: 1 else if 1 < 0: 0"
-    [
-      Tree.Ast.If
-        {
-          loc = _position;
-          then_ =
-            ( _position,
-              Tree.Ast.BinaryOp
-                ( _position,
-                  Gt,
-                  Tree.Ast.Integer (_position, "1"),
-                  Tree.Ast.Integer (_position, "0") ),
-              [ Tree.Ast.Expression (Tree.Ast.Integer (_position, "1")) ] );
-          elifs = [];
-          else_ =
-            [
-              Tree.Ast.If
-                {
-                  loc = _position;
-                  then_ =
-                    ( _position,
-                      Tree.Ast.BinaryOp
-                        ( _position,
-                          Lt,
-                          Tree.Ast.Integer (_position, "1"),
-                          Tree.Ast.Integer (_position, "0") ),
-                      [
-                        Tree.Ast.Expression (Tree.Ast.Integer (_position, "0"));
-                      ] );
-                  elifs = [];
-                  else_ = [];
-                };
-            ];
-        };
-    ]
-
-let test_precedence7 () =
-  _test_instruction "(1 + 1 = '')"
-    [
-      Tree.Ast.Expression
-        (Tree.Ast.BinaryOp
-           ( _position,
-             Eq,
-             Tree.Ast.BinaryOp
-               ( _position,
-                 Plus,
-                 Tree.Ast.Integer (_position, "1"),
-                 Tree.Ast.Integer (_position, "1") ),
-             Tree.Ast.Literal (_position, "") ));
-    ]
-
-let test_precedence8 () =
-  _test_instruction "(0 = 1 or 0 = 1)"
-    [
-      Tree.Ast.Expression
-        (Tree.Ast.BinaryOp
-           ( _position,
-             Or,
-             Tree.Ast.BinaryOp
-               ( _position,
-                 Eq,
-                 Tree.Ast.Integer (_position, "0"),
-                 Tree.Ast.Integer (_position, "1") ),
-             Tree.Ast.BinaryOp
-               ( _position,
-                 Eq,
-                 Tree.Ast.Integer (_position, "0"),
-                 Tree.Ast.Integer (_position, "1") ) ));
-    ]
-
-let syntax =
-  ( "Syntax",
-    [
-      Alcotest.test_case "Location" `Quick test_empty_location;
-      Alcotest.test_case "Location" `Quick test_location_without_database;
-      Alcotest.test_case " Numeric expression" `Quick test_numeric_expression;
-      Alcotest.test_case "-Numeric expression" `Quick
-        test_negative_numeric_expression;
-      Alcotest.test_case "-Numeric expression2" `Quick
-        test_negative_numeric_expression2;
-      Alcotest.test_case "$Variable expression" `Quick test_str_variable;
-      Alcotest.test_case " Variable expression" `Quick test_variable;
-      Alcotest.test_case "Indexed Variable expression" `Quick
-        test_indexed_variable;
-      Alcotest.test_case "Let instruction" `Quick test_let_literal;
-      Alcotest.test_case "Set array_append" `Quick test_set_array_append;
-      Alcotest.test_case "Variable_assignation" `Quick test_direct_assignation;
-      Alcotest.test_case "Command assignation" `Quick test_command_assignation;
-      Alcotest.test_case "Variable_assignation2" `Quick test_assignation2;
-      Alcotest.test_case "Literal" `Quick test_literal;
-      Alcotest.test_case "Literal2" `Quick test_qutoted_literal;
-      Alcotest.test_case "Literal3" `Quick test_multilie_literal;
-      Alcotest.test_case "Concat Literal" `Quick test_concat_literal;
-      Alcotest.test_case "Nested Literal" `Quick test_nested_literal;
-      Alcotest.test_case "Multiline1" `Quick test_multiline1;
-      Alcotest.test_case "Multiline2" `Quick test_multiline2;
-      Alcotest.test_case "Equality" `Quick test_equality;
-      Alcotest.test_case "Plus" `Quick test_plus;
-      Alcotest.test_case "Plus_litt" `Quick test_plus_litt;
-      Alcotest.test_case "PlusChained" `Quick test_concat;
-      Alcotest.test_case "Comment" `Quick test_comment;
-      Alcotest.test_case "Comment2" `Quick test_comment2;
-      Alcotest.test_case "Comment3" `Quick test_comment3;
-      Alcotest.test_case "Comment4" `Quick test_comment4;
-      Alcotest.test_case "Comment5" `Quick test_comment5;
-      Alcotest.test_case "Comment6" `Quick test_comment6;
-      Alcotest.test_case "Multiline Comment" `Quick test_long_comment;
-      Alcotest.test_case "If" `Quick test_if;
-      Alcotest.test_case "If - end if" `Quick test_if2;
-      Alcotest.test_case "If_chained" `Quick test_if_chained;
-      Alcotest.test_case "If_equality" `Quick test_if_equality;
-      Alcotest.test_case "If inline" `Quick test_if_inline;
-      Alcotest.test_case "If inline &!" `Quick test_if_inline_comment;
-      Alcotest.test_case "If inline & !!" `Quick test_if_inline_comment2;
-      Alcotest.test_case "If : act" `Quick test_if_inline_act;
-      Alcotest.test_case "If : act: &!" `Quick test_if_inline_act2;
-      Alcotest.test_case "Precedence1" `Quick test_precedence;
-      Alcotest.test_case "Precedence2" `Quick test_precedence2;
-      Alcotest.test_case "Precedence3" `Quick test_precedence3;
-      Alcotest.test_case "Call gs" `Quick test_gs;
-      Alcotest.test_case "Call gt" `Quick test_gt;
-      Alcotest.test_case "Call nl" `Quick test_nl;
-      Alcotest.test_case "Function iif" `Quick test_function;
-      Alcotest.test_case "Function rand" `Quick test_function2;
-      Alcotest.test_case "Precedence4" `Quick test_precedence4;
-      Alcotest.test_case "Precedence5" `Quick test_precedence5;
-      Alcotest.test_case "Precedence6" `Quick test_precedence6;
-      Alcotest.test_case "Operator" `Quick test_operator;
-      Alcotest.test_case "Operator2" `Quick test_operator2;
-      Alcotest.test_case "Dyneval" `Quick test_dyneval;
-      Alcotest.test_case "Input" `Quick test_input;
-      Alcotest.test_case "inline if else if" `Quick test_mutiple_inline_ifs;
-      Alcotest.test_case "Precedence7" `Quick test_precedence7;
-      Alcotest.test_case "Precedence8" `Quick test_precedence8;
-    ] )
-
-let () = Alcotest.run "qsp_parser" [ syntax ]
+let () = Alcotest.run "qsp_parser" [ Syntax.test; Syntax_error.test ]
diff --git a/test/syntax.ml b/test/syntax.ml
new file mode 100644
index 0000000..8c6334e
--- /dev/null
+++ b/test/syntax.ml
@@ -0,0 +1,832 @@
+module Parser = Qparser.Parser.Make (Qsp_syntax.Tree)
+module Tree = Qsp_syntax.Tree
+module Ast = Qsp_syntax.Tree.Ast
+module T = Ast
+
+let _position = (Lexing.dummy_pos, Lexing.dummy_pos)
+
+type 'a location = 'a * 'a Ast.statement list [@@deriving eq, show]
+
+let get_location :
+    (T.pos location, Qsp_syntax.Report.t) result -> T.pos location = function
+  | Ok e -> e
+  | Error e ->
+      let msg = Format.asprintf "%a" Qsp_syntax.Report.pp e in
+      raise (Failure msg)
+
+(** Run the parser with the given expression and return the result *)
+let parse : string -> (T.pos location, Qsp_syntax.Report.t) result =
+ fun content ->
+  let lexing =
+    Sedlexing.Latin1.from_string content |> Qparser.Lexbuf.from_lexbuf
+  in
+  Qparser.Analyzer.parse (module Qsp_syntax.Tree) lexing
+
+let location : T.pos location Alcotest.testable =
+  let equal = equal_location (fun _ _ -> true) in
+  let pp =
+    pp_location (fun formater _ -> Format.fprintf formater "_position")
+  in
+  Alcotest.testable pp equal
+
+let test_empty_location () =
+  let expected = (_position, [])
+  and actual = get_location @@ parse {|# Location
+------- |}
+  and msg = "Empty location" in
+
+  Alcotest.(check' location ~msg ~expected ~actual)
+
+let test_location_without_database () =
+  let expected = (_position, [])
+  and actual = get_location @@ parse {|# $Location
+------- |}
+  and msg = "Location without database" in
+
+  let () = Alcotest.(check' location ~msg ~expected ~actual) in
+
+  let actual = get_location @@ parse {|# !Location
+------- |} in
+  let () = Alcotest.(check' location ~msg ~expected ~actual) in
+
+  let actual = get_location @@ parse {|# ^Location
+------- |} in
+  Alcotest.(check' location ~msg ~expected ~actual)
+
+let _test_instruction : string -> Ast.pos Ast.statement list -> unit =
+ fun literal expected ->
+  let expected = (_position, expected)
+  and _location = Printf.sprintf {|# Location
+%s
+------- |} literal in
+  let actual = get_location @@ parse _location and msg = literal in
+
+  Alcotest.(check' location ~msg ~expected ~actual)
+
+let test_numeric_expression () =
+  _test_instruction "123" [ Expression (Integer (_position, "123")) ]
+
+let test_negative_numeric_expression () =
+  _test_instruction "-123"
+    [ Expression (Op (_position, Neg, Integer (_position, "123"))) ]
+
+let test_negative_numeric_expression2 () =
+  let index = None in
+  let var = { Ast.pos = _position; name = "CURTIMESUN"; index } in
+  _test_instruction "-(780-CurTimeSun)"
+    Ast.
+      [
+        Expression
+          (Op
+             ( _position,
+               Neg,
+               BinaryOp (_position, Minus, Integer (_position, "780"), Ident var)
+             ));
+      ]
+
+let test_str_variable () =
+  let index = None in
+  let var = { Ast.pos = _position; name = "$VALUE"; index } in
+  _test_instruction "$value" [ Expression (Ident var) ]
+
+let test_variable () =
+  let index = None in
+  let var = { Ast.pos = _position; name = "VALUE"; index } in
+  _test_instruction "value" [ Expression (Ident var) ]
+
+let test_indexed_variable () =
+  let index = Some Ast.(Integer (_position, "1")) in
+  let var = { Ast.pos = _position; name = "VALUE"; index } in
+  _test_instruction "value[1]" [ Expression (Ident var) ]
+
+let test_let_literal () =
+  let index = None in
+  let var = { Ast.pos = _position; name = "VALUE"; index } in
+  _test_instruction "let value = '123'"
+    Ast.[ Declaration (_position, var, Eq', Literal (_position, "123")) ]
+
+let test_set_array_append () =
+  let var = { Ast.pos = _position; name = "$VALUE"; index = None } in
+  _test_instruction "set $value[] = ''"
+    Ast.[ Declaration (_position, var, Eq', Literal (_position, "")) ]
+
+let test_direct_assignation () =
+  let index = None in
+  let var = { T.pos = _position; name = "VALUE"; index } in
+  _test_instruction "value = '123'"
+    Ast.[ Declaration (_position, var, Eq', Literal (_position, "123")) ]
+
+let test_command_assignation () =
+  let index = None in
+  let st_1 = { Ast.pos = _position; name = "ST_1"; index } in
+  _test_instruction "st_1 = input 'Enter the amount'"
+    Ast.
+      [
+        Declaration
+          ( _position,
+            st_1,
+            Eq',
+            Function
+              (_position, Input, [ Literal (_position, "Enter the amount") ]) );
+      ]
+
+let test_assignation2 () =
+  let index = None in
+  let var = { Ast.pos = _position; name = "VALUE"; index } in
+  _test_instruction "set value += 123"
+    Ast.[ Declaration (_position, var, Inc, Integer (_position, "123")) ]
+
+let test_multilie_literal () =
+  let index = None in
+  let var = { Ast.pos = _position; name = "VALUE"; index } in
+  _test_instruction {| 
+  value = {
+$a = '123'
+}|}
+    Ast.
+      [
+        Declaration (_position, var, Eq', Literal (_position, "\n$a = '123'\n"));
+      ]
+
+let test_nested_literal () =
+  _test_instruction
+    {| 
+  value = {
+
+      {
+
+      }
+}|}
+    [
+      Ast.Declaration
+        ( _position,
+          { Ast.pos = _position; name = "VALUE"; index = None },
+          Qsp_syntax.T.Eq',
+          Ast.Literal (_position, "\n\n      {\n\n      }\n") );
+    ]
+
+let test_concat_literal () =
+  _test_instruction {| 
+  '123'
+  +'456'
+|}
+    [
+      Ast.Expression (Ast.Literal (_position, "123"));
+      Ast.Expression
+        (Ast.Op (_position, Qsp_syntax.T.Add, Ast.Literal (_position, "456")));
+    ]
+
+let test_literal () =
+  _test_instruction "'123'" [ Expression (Literal (_position, "123")) ]
+
+let test_qutoted_literal () =
+  _test_instruction "'12''3'" [ Expression (Literal (_position, "12'3")) ]
+
+let test_multiline1 () =
+  let content = {|
+apples  = 5
+pears   = 10
+|} in
+
+  let index = None in
+  let apples = { Ast.pos = _position; name = "APPLES"; index }
+  and pears = { Ast.pos = _position; name = "PEARS"; index }
+  and value_5 = Ast.Integer (_position, "5")
+  and value_10 = Ast.Integer (_position, "10") in
+  _test_instruction content
+    Ast.
+      [
+        Declaration (_position, apples, Eq', value_5);
+        Declaration (_position, pears, Eq', value_10);
+      ]
+
+let test_multiline2 () =
+  let content = "apples = 5 & pears = 10" in
+
+  let index = None in
+  let apples = { Ast.pos = _position; name = "APPLES"; index }
+  and pears = { Ast.pos = _position; name = "PEARS"; index }
+  and value_5 = Ast.Integer (_position, "5")
+  and value_10 = Ast.Integer (_position, "10") in
+  _test_instruction content
+    [
+      Declaration (_position, apples, Eq', value_5);
+      Declaration (_position, pears, Eq', value_10);
+    ]
+
+let test_equality () =
+  let content = "apples = 5 = pears" in
+  let index = None in
+  let apples = { Ast.pos = _position; name = "APPLES"; index }
+  and pears = { Ast.pos = _position; name = "PEARS"; index }
+  and value_5 = Ast.Integer (_position, "5") in
+  _test_instruction content
+    [
+      Declaration
+        (_position, apples, Eq', BinaryOp (_position, Eq, value_5, Ident pears));
+    ]
+
+let test_plus () =
+  let content = {|
+apples = 5 + pears
+|} in
+  let index = None in
+  let apples = { Ast.pos = _position; name = "APPLES"; index }
+  and pears = { Ast.pos = _position; name = "PEARS"; index }
+  and value_5 = Ast.Integer (_position, "5") in
+  _test_instruction content
+    [
+      Declaration
+        ( _position,
+          apples,
+          Eq',
+          BinaryOp (_position, Plus, value_5, Ident pears) );
+    ]
+
+let test_plus_litt () =
+  let content = {|
+'five'+ pears
+|} in
+  let index = None in
+  let pears = { Ast.pos = _position; name = "PEARS"; index } in
+  _test_instruction content
+    [
+      Ast.(
+        Expression
+          (BinaryOp (_position, Plus, Literal (_position, "five"), Ident pears)));
+    ]
+
+let test_concat () =
+  let content = {|
+$firstName + ' ' + $lastName
+|} in
+  _test_instruction content
+    [
+      Tree.Ast.Expression
+        (Tree.Ast.BinaryOp
+           ( _position,
+             Plus,
+             Tree.Ast.BinaryOp
+               ( _position,
+                 Plus,
+                 Tree.Ast.Ident
+                   {
+                     Tree.Ast.pos = _position;
+                     name = "$FIRSTNAME";
+                     index = None;
+                   },
+                 Tree.Ast.Literal (_position, " ") ),
+             Tree.Ast.Ident
+               { Tree.Ast.pos = _position; name = "$LASTNAME"; index = None } ));
+    ]
+
+let test_comment () = _test_instruction "! Comment" [ Comment _position ]
+
+let test_comment2 () =
+  let index = None in
+  let a = { Ast.pos = _position; name = "A"; index }
+  and value_0 = Ast.Integer (_position, "0") in
+  _test_instruction "a = 0 &! Comment"
+    Ast.[ Declaration (_position, a, Eq', value_0); Comment _position ]
+
+let test_comment3 () = _test_instruction {|!!1234
+  |} [ Comment _position ]
+
+(** The exclamation mark here is an operation and not a comment *)
+let test_comment4 () =
+  let index = None in
+  let a = { Ast.pos = _position; name = "A"; index }
+  and value_0 = Ast.Integer (_position, "0") in
+  _test_instruction "a = rand(0, 1) ! 0"
+    [
+      Ast.(
+        Declaration
+          ( _position,
+            a,
+            Eq',
+            BinaryOp
+              ( _position,
+                Neq,
+                Function
+                  ( _position,
+                    Rand,
+                    [ Integer (_position, "0"); Integer (_position, "1") ] ),
+                value_0 ) ));
+    ]
+
+let test_comment5 () =
+  _test_instruction "a = rand() &! Comment"
+    [
+      Ast.Declaration
+        ( _position,
+          { Ast.pos = _position; name = "A"; index = None },
+          Qsp_syntax.T.Eq',
+          Ast.Function (_position, Rand, []) );
+      Ast.Comment _position;
+    ]
+
+let test_comment6 () =
+  _test_instruction
+    "gs 'stat' &!! It should be here, because some of the strigs have to be \
+     initialized"
+    [
+      Ast.Call (_position, "GOSUB", [ Ast.Literal (_position, "stat") ]);
+      Ast.Comment _position;
+    ]
+
+let test_long_comment () =
+  _test_instruction
+    {| !'this part of the comment is inside
+single quotes' but "this is still part
+of the same comment because sometimes
+life is unfair." Oh yeah, {curly brackets
+also count}. This is still the same comment. |}
+    [ Comment _position ]
+
+(** This test ensure that the unary operator is applied to the whole expression
+ *)
+let test_precedence () =
+  let index = None in
+  let x = Ast.Ident { Ast.pos = _position; name = "X"; index }
+  and y = Ast.Ident { Ast.pos = _position; name = "Y"; index } in
+  _test_instruction "no x = y"
+    Ast.[ Expression (Op (_position, No, BinaryOp (_position, Eq, x, y))) ]
+
+(** This test ensure that a ! is not considered as a comment in an 
+    expression *)
+let test_precedence2 () =
+  let index = None in
+  let x = { Ast.pos = _position; name = "X"; index }
+  and y = Ast.Ident { Ast.pos = _position; name = "Y"; index } in
+  _test_instruction "x = y ! 0"
+    Ast.
+      [
+        Declaration
+          ( _position,
+            x,
+            Eq',
+            BinaryOp (_position, Neq, y, Integer (_position, "0")) );
+      ]
+
+let test_if () =
+  let index = Some Ast.(Integer (_position, "0")) in
+  let args = Ast.(Ident { pos = _position; name = "$ARGS"; index })
+  and expr1 = Ast.(Literal (_position, "blockA"))
+  and expr2 = Ast.(Expression (Literal (_position, "You are in block A"))) in
+  _test_instruction {| if $ARGS[0] = 'blockA':
+  'You are in block A'
+end |}
+    Ast.
+      [
+        If
+          {
+            loc = _position;
+            then_ = (_position, BinaryOp (_position, Eq, args, expr1), [ expr2 ]);
+            elifs = [];
+            else_ = [];
+          };
+      ]
+
+let test_if2 () =
+  let index = Some Ast.(Integer (_position, "0")) in
+  let args = Ast.(Ident { pos = _position; name = "$ARGS"; index })
+  and expr1 = Ast.(Literal (_position, "blockA"))
+  and expr2 = Ast.(Expression (Literal (_position, "You are in block A"))) in
+  _test_instruction {| if $ARGS[0] = 'blockA':
+  'You are in block A'
+end if|}
+    Ast.
+      [
+        If
+          {
+            loc = _position;
+            then_ = (_position, BinaryOp (_position, Eq, args, expr1), [ expr2 ]);
+            elifs = [];
+            else_ = [];
+          };
+      ]
+
+let test_if_chained () =
+  let value_0 = Ast.Integer (_position, "0") in
+  _test_instruction {| if 0:
+  0
+end &! -- |}
+    Ast.
+      [
+        If
+          {
+            loc = _position;
+            then_ = (_position, value_0, [ Expression value_0 ]);
+            elifs = [];
+            else_ = [];
+          };
+        Comment _position;
+      ]
+
+let test_if_equality () =
+  _test_instruction {|
+if 0 = 0:
+end &! --
+|}
+    [
+      Ast.If
+        {
+          loc = _position;
+          then_ =
+            ( _position,
+              Ast.BinaryOp
+                ( _position,
+                  Qsp_syntax.T.Eq,
+                  Ast.Integer (_position, "0"),
+                  Ast.Integer (_position, "0") ),
+              [] );
+          elifs = [];
+          else_ = [];
+        };
+      Ast.Comment _position;
+    ]
+
+let test_if_inline () =
+  let value_0 = Ast.Integer (_position, "0") in
+  _test_instruction "if 0: 0 else 0"
+    Ast.
+      [
+        If
+          {
+            loc = _position;
+            then_ = (_position, value_0, [ Expression value_0 ]);
+            elifs = [];
+            else_ = [ Expression value_0 ];
+          };
+      ]
+
+let test_if_inline_comment () =
+  let value_0 = Ast.Integer (_position, "0") in
+  _test_instruction "if 0: 0 else 0 &! comment "
+    Ast.
+      [
+        If
+          {
+            loc = _position;
+            then_ = (_position, value_0, [ Expression value_0 ]);
+            elifs = [];
+            else_ = [ Expression value_0 ];
+          };
+        Comment _position;
+      ]
+
+let test_if_inline_comment2 () =
+  _test_instruction "if 0: 1 & !! Comment"
+    [
+      Ast.If
+        {
+          loc = _position;
+          then_ =
+            ( _position,
+              Ast.Integer (_position, "0"),
+              [
+                Ast.Expression (Ast.Integer (_position, "1"));
+                Ast.Comment _position;
+              ] );
+          elifs = [];
+          else_ = [];
+        };
+    ]
+
+let test_if_inline_act () =
+  _test_instruction "if 1 and hour >= 8: minut += 1 & act 'go': gt 'go'"
+    [
+      Ast.If
+        {
+          loc = _position;
+          then_ =
+            ( _position,
+              Ast.BinaryOp
+                ( _position,
+                  Qsp_syntax.T.And,
+                  Ast.Integer (_position, "1"),
+                  Ast.BinaryOp
+                    ( _position,
+                      Qsp_syntax.T.Gte,
+                      Ast.Ident
+                        { Ast.pos = _position; name = "HOUR"; index = None },
+                      Ast.Integer (_position, "8") ) ),
+              [
+                Ast.Declaration
+                  ( _position,
+                    { Ast.pos = _position; name = "MINUT"; index = None },
+                    Qsp_syntax.T.Inc,
+                    Ast.Integer (_position, "1") );
+                Ast.Act
+                  {
+                    loc = _position;
+                    label = Ast.Literal (_position, "go");
+                    statements =
+                      [
+                        Ast.Call
+                          (_position, "GOTO", [ Ast.Literal (_position, "go") ]);
+                      ];
+                  };
+              ] );
+          elifs = [];
+          else_ = [];
+        };
+    ]
+
+let test_if_inline_act2 () =
+  _test_instruction "if 1: act 'go': gt 'go' &! comment "
+    [
+      Ast.If
+        {
+          loc = _position;
+          then_ =
+            ( _position,
+              Ast.Integer (_position, "1"),
+              [
+                Ast.Act
+                  {
+                    loc = _position;
+                    label = Ast.Literal (_position, "go");
+                    statements =
+                      [
+                        Ast.Call
+                          (_position, "GOTO", [ Ast.Literal (_position, "go") ]);
+                        Ast.Comment _position;
+                      ];
+                  };
+              ] );
+          elifs = [];
+          else_ = [];
+        };
+    ]
+
+let test_precedence3 () =
+  let index = Some Ast.(Integer (_position, "0")) in
+  let args = Ast.(Ident { pos = _position; name = "$ARGS"; index })
+  and expr1 = Ast.(Literal (_position, "blockA"))
+  and expr2 = Ast.(Expression (Literal (_position, "You are in block A")))
+  and expr3 = Ast.(Expression (Integer (_position, "0"))) in
+  _test_instruction {| if $ARGS[0] = 'blockA': 'You are in block A' & 0|}
+    Ast.
+      [
+        If
+          {
+            loc = _position;
+            then_ =
+              ( _position,
+                BinaryOp (_position, Eq, args, expr1),
+                [ expr2; expr3 ] );
+            elifs = [];
+            else_ = [];
+          };
+      ]
+
+let test_gs () =
+  _test_instruction "gs '123'"
+    [ Ast.(Call (_position, "GOSUB", [ Literal (_position, "123") ])) ]
+
+let test_gt () =
+  _test_instruction "gt $curloc"
+    [
+      Ast.Call
+        ( _position,
+          "GOTO",
+          [ Ast.Ident { Ast.pos = _position; name = "$CURLOC"; index = None } ]
+        );
+    ]
+
+let test_nl () =
+  _test_instruction "*NL 'It'"
+    [ Ast.Call (_position, "*NL", [ Ast.Literal (_position, "It") ]) ]
+
+let test_function () =
+  _test_instruction "iif(123, 1, 0)"
+    [
+      Ast.(
+        Expression
+          (Function
+             ( _position,
+               Iif,
+               [
+                 Integer (_position, "123");
+                 Integer (_position, "1");
+                 Integer (_position, "0");
+               ] )));
+    ]
+
+(** Include a space before the parameters *)
+let test_function2 () =
+  _test_instruction "rand (0, 1)"
+    [
+      Ast.(
+        Expression
+          (Function
+             ( _position,
+               Rand,
+               [ Integer (_position, "0"); Integer (_position, "1") ] )));
+    ]
+
+let test_precedence4 () =
+  _test_instruction "trim()" Ast.[ Expression (Function (_position, Trim, [])) ]
+
+(** This should not be a keyword without arguments, followed by an expression *)
+let test_precedence5 () =
+  _test_instruction "clear()" Ast.[ Call (_position, "CLEAR", []) ]
+
+let test_precedence6 () =
+  _test_instruction "(1 = 0 and 2 ! 3)"
+    [
+      Ast.Expression
+        (Ast.BinaryOp
+           ( _position,
+             And,
+             Ast.BinaryOp
+               ( _position,
+                 Eq,
+                 Ast.Integer (_position, "1"),
+                 Ast.Integer (_position, "0") ),
+             Ast.BinaryOp
+               ( _position,
+                 Neq,
+                 Ast.Integer (_position, "2"),
+                 Ast.Integer (_position, "3") ) ));
+    ]
+
+(** An identifier cannot start by a number *0 is a product and not an
+    identifier *)
+let test_operator () =
+  let index = None in
+  let a = { Ast.pos = _position; name = "A"; index }
+  and value_0 = Ast.Integer (_position, "0") in
+  _test_instruction "a *0"
+    Ast.[ Expression (BinaryOp (_position, Product, Ident a, value_0)) ]
+
+let test_operator2 () =
+  let value_0 = Ast.Integer (_position, "0") in
+  _test_instruction "0 *rand()"
+    Ast.
+      [
+        Expression
+          (BinaryOp (_position, Product, value_0, Function (_position, Rand, [])));
+      ]
+
+let test_dyneval () =
+  _test_instruction "dyneval ''"
+    [
+      Ast.Expression
+        (Ast.Function (_position, Dyneval, [ Ast.Literal (_position, "") ]));
+    ]
+
+(** The parens after input are considered as arguments for the function, not a
+    following expression. 
+
+    This expression is a boolean.
+*)
+let test_input () =
+  _test_instruction "( input('') = '' )"
+    [
+      Tree.Ast.Expression
+        (Tree.Ast.BinaryOp
+           ( _position,
+             Eq,
+             Tree.Ast.Function
+               (_position, Input, [ Tree.Ast.Literal (_position, "") ]),
+             Tree.Ast.Literal (_position, "") ));
+    ]
+
+let test_mutiple_inline_ifs () =
+  _test_instruction "if 1 > 0: 1 else if 1 < 0: 0"
+    [
+      Tree.Ast.If
+        {
+          loc = _position;
+          then_ =
+            ( _position,
+              Tree.Ast.BinaryOp
+                ( _position,
+                  Gt,
+                  Tree.Ast.Integer (_position, "1"),
+                  Tree.Ast.Integer (_position, "0") ),
+              [ Tree.Ast.Expression (Tree.Ast.Integer (_position, "1")) ] );
+          elifs = [];
+          else_ =
+            [
+              Tree.Ast.If
+                {
+                  loc = _position;
+                  then_ =
+                    ( _position,
+                      Tree.Ast.BinaryOp
+                        ( _position,
+                          Lt,
+                          Tree.Ast.Integer (_position, "1"),
+                          Tree.Ast.Integer (_position, "0") ),
+                      [
+                        Tree.Ast.Expression (Tree.Ast.Integer (_position, "0"));
+                      ] );
+                  elifs = [];
+                  else_ = [];
+                };
+            ];
+        };
+    ]
+
+let test_precedence7 () =
+  _test_instruction "(1 + 1 = '')"
+    [
+      Tree.Ast.Expression
+        (Tree.Ast.BinaryOp
+           ( _position,
+             Eq,
+             Tree.Ast.BinaryOp
+               ( _position,
+                 Plus,
+                 Tree.Ast.Integer (_position, "1"),
+                 Tree.Ast.Integer (_position, "1") ),
+             Tree.Ast.Literal (_position, "") ));
+    ]
+
+let test_precedence8 () =
+  _test_instruction "(0 = 1 or 0 = 1)"
+    [
+      Tree.Ast.Expression
+        (Tree.Ast.BinaryOp
+           ( _position,
+             Or,
+             Tree.Ast.BinaryOp
+               ( _position,
+                 Eq,
+                 Tree.Ast.Integer (_position, "0"),
+                 Tree.Ast.Integer (_position, "1") ),
+             Tree.Ast.BinaryOp
+               ( _position,
+                 Eq,
+                 Tree.Ast.Integer (_position, "0"),
+                 Tree.Ast.Integer (_position, "1") ) ));
+    ]
+
+let test =
+  ( "Syntax",
+    [
+      Alcotest.test_case "Location" `Quick test_empty_location;
+      Alcotest.test_case "Location" `Quick test_location_without_database;
+      Alcotest.test_case " Numeric expression" `Quick test_numeric_expression;
+      Alcotest.test_case "-Numeric expression" `Quick
+        test_negative_numeric_expression;
+      Alcotest.test_case "-Numeric expression2" `Quick
+        test_negative_numeric_expression2;
+      Alcotest.test_case "$Variable expression" `Quick test_str_variable;
+      Alcotest.test_case " Variable expression" `Quick test_variable;
+      Alcotest.test_case "Indexed Variable expression" `Quick
+        test_indexed_variable;
+      Alcotest.test_case "Let instruction" `Quick test_let_literal;
+      Alcotest.test_case "Set array_append" `Quick test_set_array_append;
+      Alcotest.test_case "Variable_assignation" `Quick test_direct_assignation;
+      Alcotest.test_case "Command assignation" `Quick test_command_assignation;
+      Alcotest.test_case "Variable_assignation2" `Quick test_assignation2;
+      Alcotest.test_case "Literal" `Quick test_literal;
+      Alcotest.test_case "Literal2" `Quick test_qutoted_literal;
+      Alcotest.test_case "Literal3" `Quick test_multilie_literal;
+      Alcotest.test_case "Concat Literal" `Quick test_concat_literal;
+      Alcotest.test_case "Nested Literal" `Quick test_nested_literal;
+      Alcotest.test_case "Multiline1" `Quick test_multiline1;
+      Alcotest.test_case "Multiline2" `Quick test_multiline2;
+      Alcotest.test_case "Equality" `Quick test_equality;
+      Alcotest.test_case "Plus" `Quick test_plus;
+      Alcotest.test_case "Plus_litt" `Quick test_plus_litt;
+      Alcotest.test_case "PlusChained" `Quick test_concat;
+      Alcotest.test_case "Comment" `Quick test_comment;
+      Alcotest.test_case "Comment2" `Quick test_comment2;
+      Alcotest.test_case "Comment3" `Quick test_comment3;
+      Alcotest.test_case "Comment4" `Quick test_comment4;
+      Alcotest.test_case "Comment5" `Quick test_comment5;
+      Alcotest.test_case "Comment6" `Quick test_comment6;
+      Alcotest.test_case "Multiline Comment" `Quick test_long_comment;
+      Alcotest.test_case "If" `Quick test_if;
+      Alcotest.test_case "If - end if" `Quick test_if2;
+      Alcotest.test_case "If_chained" `Quick test_if_chained;
+      Alcotest.test_case "If_equality" `Quick test_if_equality;
+      Alcotest.test_case "If inline" `Quick test_if_inline;
+      Alcotest.test_case "If inline &!" `Quick test_if_inline_comment;
+      Alcotest.test_case "If inline & !!" `Quick test_if_inline_comment2;
+      Alcotest.test_case "If : act" `Quick test_if_inline_act;
+      Alcotest.test_case "If : act: &!" `Quick test_if_inline_act2;
+      Alcotest.test_case "Precedence1" `Quick test_precedence;
+      Alcotest.test_case "Precedence2" `Quick test_precedence2;
+      Alcotest.test_case "Precedence3" `Quick test_precedence3;
+      Alcotest.test_case "Call gs" `Quick test_gs;
+      Alcotest.test_case "Call gt" `Quick test_gt;
+      Alcotest.test_case "Call nl" `Quick test_nl;
+      Alcotest.test_case "Function iif" `Quick test_function;
+      Alcotest.test_case "Function rand" `Quick test_function2;
+      Alcotest.test_case "Precedence4" `Quick test_precedence4;
+      Alcotest.test_case "Precedence5" `Quick test_precedence5;
+      Alcotest.test_case "Precedence6" `Quick test_precedence6;
+      Alcotest.test_case "Operator" `Quick test_operator;
+      Alcotest.test_case "Operator2" `Quick test_operator2;
+      Alcotest.test_case "Dyneval" `Quick test_dyneval;
+      Alcotest.test_case "Input" `Quick test_input;
+      Alcotest.test_case "inline if else if" `Quick test_mutiple_inline_ifs;
+      Alcotest.test_case "Precedence7" `Quick test_precedence7;
+      Alcotest.test_case "Precedence8" `Quick test_precedence8;
+    ] )
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;
+    ] )