t/Compiler.t

   1 #!/usr/bin/perl
   2 use strict;
   3 use warnings;
   4
   5 use Test::More tests => 31;
   6 BEGIN { use_ok('App::Scheme79asm::Compiler', qw/pretty_print/) };
   7
   8 sub is_sexp {
   9         my ($expr, $expected, $name) = @_;
  10         is pretty_print($expr), $expected, $name;
  11 }
  12
  13 sub to_sexp {
  14         my ($string) = @_;
  15         scalar Data::SExpression->new({fold_lists => 0, use_symbol_class => 1})->read($string)
  16 }
  17
  18 sub new {
  19         App::Scheme79asm::Compiler->new;
  20 }
  21
  22 sub is_toplevel {
  23         my ($string, $expected) = @_;
  24         is_sexp new->process_toplevel(to_sexp $string), $expected, "process_toplevel $string";
  25         is_sexp new->compile_string($string), $expected, "compile_string $string";
  26 }
  27
  28 is_sexp new->process_quoted(to_sexp '5'), '(SYMBOL 3)', 'process_quoted 5';
  29 is_sexp new->process_quoted(to_sexp '()'), '(LIST 0)', 'process_quoted ()';
  30 is_sexp new->process_quoted(to_sexp '(5 foo)'), '(LIST (LIST (LIST 0) (SYMBOL 3)) (SYMBOL 4))', 'process_quoted (5 foo)';
  31 is_sexp new->process_quoted(to_sexp '(((5)))'), '(LIST (LIST 0) (LIST (LIST 0) (LIST (LIST 0) (SYMBOL 3))))', 'process_quoted (((5)))';
  32
  33 is_toplevel '()', '(LIST 0)';
  34 is_toplevel 'NIL', '(LIST 0)';
  35 is_toplevel 'T', '(SYMBOL 2)';
  36 is_toplevel '(quote 5)', '(SYMBOL 3)';
  37 is_toplevel '(reverse-list \'a \'a \'b)', '(CALL (MORE (MORE (REVERSE-LIST 0) (SYMBOL 4)) (SYMBOL 3)) (SYMBOL 3))';
  38 is_toplevel '(if t \'(2 3) \'x)', '(IF (LIST (SYMBOL 5) (LIST (LIST (LIST 0) (SYMBOL 3)) (SYMBOL 4))) (SYMBOL 2))';
  39 is_toplevel '(car \'(1 2))', '(CALL (CAR 0) (LIST (LIST (LIST 0) (SYMBOL 3)) (SYMBOL 4)))';
  40 is_toplevel '(lambda id (x) x)', '(PROC (VAR -2))';
  41 is_toplevel '((lambda id (x) x) 5)', '(CALL (MORE (FUNCALL 0) (PROC (VAR -2))) (SYMBOL 3))';
  42 is_toplevel '(lambda append (x y) (if (atom x) y (cons (car x) (append (cdr x) y))))', '(PROC (IF (LIST (CALL (MORE (CONS 0) (CALL (MORE (MORE (FUNCALL 0) (VAR -1)) (VAR -2)) (CALL (CDR 0) (VAR -3)))) (CALL (CAR 0) (VAR -3))) (VAR -2)) (CALL (ATOM 0) (VAR -3))))';
  43
  44 sub pp_roundtrip {
  45         my ($string) = @_;
  46         my $pp = uc App::Scheme79asm::Compiler::pretty_print(to_sexp $string);
  47         is $pp, uc($string), "pretty_print roundtrip $string";
  48 }
  49
  50 pp_roundtrip '()';
  51 pp_roundtrip 't';
  52 pp_roundtrip '(lambda append (x y) (if (atom x) y (cons (car x) (append (cdr x) y))))';
  53
  54 sub expect_error_like (&$) {
  55         my ($block, $error_re) = @_;
  56         my $name = "test error like /$error_re/";
  57         my $result = eval { $block->(); 1 };
  58         if ($result) {
  59                 note 'Block did not throw an exception, failing test';
  60                 fail $name;
  61         } else {
  62                 like $@, qr/$error_re/, $name;
  63         }
  64 }
  65
  66 expect_error_like { new->process_quoted([]) } 'argument to process_quoted is not a scalar, cons, or nil';
  67 expect_error_like { is_toplevel 'x' } 'Variable x not in environment';
  68 expect_error_like { is_toplevel '(car)' } 'Cannot call primitive car with no arguments';