New B::Lint option, bare-subs, that checks for implicitely

[perl5.git] / ext / B / t / lint.t

#!./perl -w

BEGIN {
    chdir 't' if -d 't';
    @INC = qw(../lib);
    require './test.pl';
}

plan tests => 13;

# Runs a separate perl interpreter with the appropriate lint options
# turned on
sub runlint ($$$;$) {
    my ($opts,$prog,$result,$testname) = @_;
    my $res = runperl(
	switches => [ "-MO=Lint,$opts" ],
	prog	 => $prog,
	stderr	 => 1,
    );
    $res =~ s/-e syntax OK\n$//;
    is( $res, $result, $testname || $opts );
}

runlint 'context', '$foo = @bar', <<'RESULT';
Implicit scalar context for array in scalar assignment at -e line 1
RESULT

runlint 'context', '$foo = length @bar', <<'RESULT';
Implicit scalar context for array in length at -e line 1
RESULT

runlint 'implicit-read', '/foo/', <<'RESULT';
Implicit match on $_ at -e line 1
RESULT

runlint 'implicit-write', 's/foo/bar/', <<'RESULT';
Implicit substitution on $_ at -e line 1
RESULT

SKIP : {

    use Config;
    skip("Doesn't work with threaded perls",9)
       if $Config{useithreads};

    runlint 'implicit-read', '1 for @ARGV', <<'RESULT', 'implicit-read in foreach';
Implicit use of $_ in foreach at -e line 1
RESULT

    runlint 'dollar-underscore', '$_ = 1', <<'RESULT';
Use of $_ at -e line 1
RESULT

    runlint 'dollar-underscore', 'print', <<'RESULT', 'dollar-underscore in print';
Use of $_ at -e line 1
RESULT

    runlint 'private-names', 'sub A::_f{};A::_f()', <<'RESULT';
Illegal reference to private name _f at -e line 1
RESULT

    runlint 'private-names', '$A::_x', <<'RESULT';
Illegal reference to private name _x at -e line 1
RESULT

    runlint 'private-names', 'sub A::_f{};A->_f()', <<'RESULT',
Illegal reference to private method name _f at -e line 1
RESULT
    'private-names (method)';

    runlint 'undefined-subs', 'foo()', <<'RESULT';
Undefined subroutine foo called at -e line 1
RESULT

    runlint 'regexp-variables', 'print $&', <<'RESULT';
Use of regexp variable $& at -e line 1
RESULT

    runlint 'regexp-variables', 's/./$&/', <<'RESULT';
Use of regexp variable $& at -e line 1
RESULT

}