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xsc_test.pl
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#
# t/test.pl - most of Test::More functionality without the fuss
# NOTE:
#
# It's best to not features found only in more modern Perls here, as some cpan
# distributions copy this file and operate on older Perls. Similarly keep
# things simple as this may be run under fairly broken circumstances. For
# example, increment ($x++) has a certain amount of cleverness for things like
#
# $x = 'zz';
# $x++; # $x eq 'aaa';
#
# This stands more chance of breaking than just a simple
#
# $x = $x + 1
#
# In this file, we use the latter "Baby Perl" approach, and increment
# will be worked over by t/op/inc.t
$Level = 1;
my $test = 1;
my $planned;
my $noplan;
my $Perl; # Safer version of $^X set by which_perl()
# This defines ASCII/UTF-8 vs EBCDIC/UTF-EBCDIC
$::IS_ASCII = ord 'A' == 65;
$::IS_EBCDIC = ord 'A' == 193;
$TODO = 0;
$NO_ENDING = 0;
$Tests_Are_Passing = 1;
BEGIN {
eval 'sub OPV () {'.$].'}';
sub OPV();
}
# Use this instead of print to avoid interference while testing globals.
sub _print {
local($\, $", $,) = (undef, ' ', '');
print STDOUT @_;
}
sub _print_stderr {
local($\, $", $,) = (undef, ' ', '');
print STDERR @_;
}
sub plan {
my $n;
if (@_ == 1) {
$n = shift;
if ($n eq 'no_plan') {
undef $n;
$noplan = 1;
}
} else {
my %plan = @_;
$plan{skip_all} and skip_all($plan{skip_all});
$n = $plan{tests};
}
_print "1..$n\n" unless $noplan;
$planned = $n;
}
# Set the plan at the end. See Test::More::done_testing.
sub done_testing {
my $n = $test - 1;
$n = shift if @_;
_print "1..$n\n";
$planned = $n;
}
END {
my $ran = $test - 1;
if (!$NO_ENDING) {
if (defined $planned && $planned != $ran) {
_print_stderr
"# Looks like you planned $planned tests but ran $ran.\n";
} elsif ($noplan) {
_print "1..$ran\n";
}
}
}
sub _diag {
return unless @_;
my @mess = _comment(@_);
$TODO ? _print(@mess) : _print_stderr(@mess);
}
# Use this instead of "print STDERR" when outputting failure diagnostic
# messages
sub diag {
_diag(@_);
}
# Use this instead of "print" when outputting informational messages
sub note {
return unless @_;
_print( _comment(@_) );
}
sub is_miniperl {
return !defined &DynaLoader::boot_DynaLoader;
}
sub set_up_inc {
# Don’t clobber @INC under miniperl
@INC = () unless is_miniperl;
unshift @INC, @_;
}
sub _comment {
return map { /^#/ ? "$_\n" : "# $_\n" }
map { split /\n/ } @_;
}
sub _have_dynamic_extension {
my $extension = shift;
unless (eval {require Config; 1}) {
warn "test.pl had problems loading Config: $@";
return 1;
}
$extension =~ s!::!/!g;
return 1 if ($Config::Config{extensions} =~ /\b$extension\b/);
}
sub skip_all {
if (@_) {
_print "1..0 # Skip @_\n";
} else {
_print "1..0\n";
}
exit(0);
}
sub skip_all_if_miniperl {
skip_all(@_) if is_miniperl();
}
sub skip_all_without_dynamic_extension {
my ($extension) = @_;
skip_all("no dynamic loading on miniperl, no $extension") if is_miniperl();
return if &_have_dynamic_extension;
skip_all("$extension was not built");
}
sub skip_all_without_perlio {
skip_all('no PerlIO') unless PerlIO::Layer->find('perlio');
}
sub skip_all_without_config {
unless (eval {require Config; 1}) {
warn "test.pl had problems loading Config: $@";
return;
}
foreach (@_) {
next if $Config::Config{$_};
my $key = $_; # Need to copy, before trying to modify.
$key =~ s/^use//;
$key =~ s/^d_//;
skip_all("no $key");
}
}
sub skip_all_without_unicode_tables { # (but only under miniperl)
if (is_miniperl()) {
skip_all_if_miniperl("Unicode tables not built yet")
unless eval 'require "unicore/Heavy.pl"';
}
}
sub find_git_or_skip {
my ($source_dir, $reason);
if (-d '.git') {
$source_dir = '.';
} elsif (-l 'MANIFEST' && -l 'AUTHORS') {
my $where = readlink 'MANIFEST';
die "Can't readling MANIFEST: $!" unless defined $where;
die "Confusing symlink target for MANIFEST, '$where'"
unless $where =~ s!/MANIFEST\z!!;
if (-d "$where/.git") {
# Looks like we are in a symlink tree
if (exists $ENV{GIT_DIR}) {
diag("Found source tree at $where, but \$ENV{GIT_DIR} is $ENV{GIT_DIR}. Not changing it");
} else {
note("Found source tree at $where, setting \$ENV{GIT_DIR}");
$ENV{GIT_DIR} = "$where/.git";
}
$source_dir = $where;
}
} elsif (exists $ENV{GIT_DIR}) {
my $commit = '8d063cd8450e59ea1c611a2f4f5a21059a2804f1';
my $out = `git rev-parse --verify --quiet '$commit^{commit}'`;
chomp $out;
if($out eq $commit) {
$source_dir = '.'
}
}
if ($source_dir) {
my $version_string = `git --version`;
if (defined $version_string
&& $version_string =~ /\Agit version (\d+\.\d+\.\d+)(.*)/) {
return $source_dir if eval "v$1 ge v1.5.0";
# If you have earlier than 1.5.0 and it works, change this test
$reason = "in git checkout, but git version '$1$2' too old";
} else {
$reason = "in git checkout, but cannot run git";
}
} else {
$reason = 'not being run from a git checkout';
}
skip_all($reason) if $_[0] && $_[0] eq 'all';
skip($reason, @_);
}
sub BAIL_OUT {
my ($reason) = @_;
_print("Bail out! $reason\n");
exit 255;
}
sub _ok {
my ($pass, $where, $name, @mess) = @_;
# Do not try to microoptimize by factoring out the "not ".
# VMS will avenge.
my $out;
if ($name) {
# escape out '#' or it will interfere with '# skip' and such
$name =~ s/#/\\#/g;
$out = $pass ? "ok $test - $name" : "not ok $test - $name";
} else {
$out = $pass ? "ok $test" : "not ok $test";
}
if ($TODO) {
$out = $out . " # TODO $TODO";
} else {
$Tests_Are_Passing = 0 unless $pass;
}
_print "$out\n";
if ($pass) {
note @mess; # Ensure that the message is properly escaped.
}
else {
my $msg = "# Failed test $test - ";
$msg.= "$name " if $name;
$msg .= "$where\n";
_diag $msg;
_diag @mess;
}
$test = $test + 1; # don't use ++
return $pass;
}
sub _where {
my @caller = caller($Level);
return "at $caller[1] line $caller[2]";
}
# DON'T use this for matches. Use like() instead.
sub ok ($@) {
my ($pass, $name, @mess) = @_;
_ok($pass, _where(), $name, @mess);
}
sub _q {
my $x = shift;
return 'undef' unless defined $x;
my $q = $x;
$q =~ s/\\/\\\\/g;
$q =~ s/'/\\'/g;
return "'$q'";
}
sub _qq {
my $x = shift;
return defined $x ? '"' . display ($x) . '"' : 'undef';
};
# keys are the codes \n etc map to, values are 2 char strings such as \n
my %backslash_escape;
foreach my $x (split //, 'nrtfa\\\'"') {
$backslash_escape{ord eval "\"\\$x\""} = "\\$x";
}
# A way to display scalars containing control characters and Unicode.
# Trying to avoid setting $_, or relying on local $_ to work.
sub display {
my @result;
foreach my $x (@_) {
if (defined $x and not ref $x) {
my $y = '';
foreach my $c (unpack((OPV ge '5.009002' ? "W*" : "U*"), $x)) {
if ($c > 255) {
$y = $y . sprintf "\\x{%x}", $c;
} elsif ($backslash_escape{$c}) {
$y = $y . $backslash_escape{$c};
} else {
my $z = chr $c; # Maybe we can get away with a literal...
if ($z !~ /[^[:^print:][:^ascii:]]/) {
# The pattern above is equivalent (by de Morgan's
# laws) to:
# $z !~ /(?[ [:print:] & [:ascii:] ])/
# or, $z is not an ascii printable character
# Use octal for characters with small ordinals that
# are traditionally expressed as octal: the controls
# below space, which on EBCDIC are almost all the
# controls, but on ASCII don't include DEL nor the C1
# controls.
if ($c < ord " ") {
$z = sprintf "\\%03o", $c;
} else {
$z = sprintf "\\x{%x}", $c;
}
}
$y = $y . $z;
}
}
$x = $y;
}
return $x unless wantarray;
push @result, $x;
}
return @result;
}
sub is ($$@) {
my ($got, $expected, $name, @mess) = @_;
my $pass;
if( !defined $got || !defined $expected ) {
# undef only matches undef
$pass = !defined $got && !defined $expected;
}
else {
$pass = $got eq $expected;
}
unless ($pass) {
unshift(@mess, "# got "._qq($got)."\n",
"# expected "._qq($expected)."\n");
}
_ok($pass, _where(), $name, @mess);
}
sub isnt ($$@) {
my ($got, $isnt, $name, @mess) = @_;
my $pass;
if( !defined $got || !defined $isnt ) {
# undef only matches undef
$pass = defined $got || defined $isnt;
}
else {
$pass = $got ne $isnt;
}
unless( $pass ) {
unshift(@mess, "# it should not be "._qq($got)."\n",
"# but it is.\n");
}
_ok($pass, _where(), $name, @mess);
}
sub cmp_ok ($$$@) {
my($got, $type, $expected, $name, @mess) = @_;
my $pass;
{
local $^W = 0;
local($@,$!); # don't interfere with $@
# eval() sometimes resets $!
$pass = eval "\$got $type \$expected";
}
unless ($pass) {
# It seems Irix long doubles can have 2147483648 and 2147483648
# that stringify to the same thing but are actually numerically
# different. Display the numbers if $type isn't a string operator,
# and the numbers are stringwise the same.
# (all string operators have alphabetic names, so tr/a-z// is true)
# This will also show numbers for some unneeded cases, but will
# definitely be helpful for things such as == and <= that fail
if ($got eq $expected and $type !~ tr/a-z//) {
unshift @mess, "# $got - $expected = " . ($got - $expected) . "\n";
}
unshift(@mess, "# got "._qq($got)."\n",
"# expected $type "._qq($expected)."\n");
}
_ok($pass, _where(), $name, @mess);
}
# Check that $got is within $range of $expected
# if $range is 0, then check it's exact
# else if $expected is 0, then $range is an absolute value
# otherwise $range is a fractional error.
# Here $range must be numeric, >= 0
# Non numeric ranges might be a useful future extension. (eg %)
sub within ($$$@) {
my ($got, $expected, $range, $name, @mess) = @_;
my $pass;
if (!defined $got or !defined $expected or !defined $range) {
# This is a fail, but doesn't need extra diagnostics
} elsif ($got !~ tr/0-9// or $expected !~ tr/0-9// or $range !~ tr/0-9//) {
# This is a fail
unshift @mess, "# got, expected and range must be numeric\n";
} elsif ($range < 0) {
# This is also a fail
unshift @mess, "# range must not be negative\n";
} elsif ($range == 0) {
# Within 0 is ==
$pass = $got == $expected;
} elsif ($expected == 0) {
# If expected is 0, treat range as absolute
$pass = ($got <= $range) && ($got >= - $range);
} else {
my $diff = $got - $expected;
$pass = abs ($diff / $expected) < $range;
}
unless ($pass) {
if ($got eq $expected) {
unshift @mess, "# $got - $expected = " . ($got - $expected) . "\n";
}
unshift@mess, "# got "._qq($got)."\n",
"# expected "._qq($expected)." (within "._qq($range).")\n";
}
_ok($pass, _where(), $name, @mess);
}
# Note: this isn't quite as fancy as Test::More::like().
sub like ($$@) { like_yn (0,@_) }; # 0 for -
sub unlike ($$@) { like_yn (1,@_) }; # 1 for un-
sub like_yn ($$$@) {
my ($flip, undef, $expected, $name, @mess) = @_;
my $pass;
$pass = $_[1] =~ /$expected/ if !$flip;
$pass = $_[1] !~ /$expected/ if $flip;
unless ($pass) {
unshift(@mess, "# got '$_[1]'\n",
$flip
? "# expected !~ /$expected/\n" : "# expected /$expected/\n");
}
local $Level = $Level + 1;
_ok($pass, _where(), $name, @mess);
}
sub pass {
_ok(1, '', @_);
}
sub fail {
_ok(0, _where(), @_);
}
sub curr_test {
$test = shift if @_;
return $test;
}
sub next_test {
my $retval = $test;
$test = $test + 1; # don't use ++
$retval;
}
# Note: can't pass multipart messages since we try to
# be compatible with Test::More::skip().
sub skip {
my $why = shift;
my $n = @_ ? shift : 1;
my $bad_swap;
my $both_zero;
{
local $^W = 0;
$bad_swap = $why > 0 && $n == 0;
$both_zero = $why == 0 && $n == 0;
}
if ($bad_swap || $both_zero || @_) {
my $arg = "'$why', '$n'";
if (@_) {
$arg .= join(", ", '', map { qq['$_'] } @_);
}
die qq[$0: expected skip(why, count), got skip($arg)\n];
}
for (1..$n) {
_print "ok $test # skip $why\n";
$test = $test + 1;
}
local $^W = 0;
last SKIP;
}
sub skip_if_miniperl {
skip(@_) if is_miniperl();
}
sub skip_without_dynamic_extension {
my $extension = shift;
skip("no dynamic loading on miniperl, no extension $extension", @_)
if is_miniperl();
return if &_have_dynamic_extension($extension);
skip("extension $extension was not built", @_);
}
sub todo_skip {
my $why = shift;
my $n = @_ ? shift : 1;
for (1..$n) {
_print "not ok $test # TODO & SKIP $why\n";
$test = $test + 1;
}
local $^W = 0;
last TODO;
}
sub eq_array {
my ($ra, $rb) = @_;
return 0 unless $#$ra == $#$rb;
for my $i (0..$#$ra) {
next if !defined $ra->[$i] && !defined $rb->[$i];
return 0 if !defined $ra->[$i];
return 0 if !defined $rb->[$i];
return 0 unless $ra->[$i] eq $rb->[$i];
}
return 1;
}
sub eq_hash {
my ($orig, $suspect) = @_;
my $fail;
while (my ($key, $value) = each %$suspect) {
# Force a hash recompute if this perl's internals can cache the hash key.
$key = "" . $key;
if (exists $orig->{$key}) {
if (
defined $orig->{$key} != defined $value
|| (defined $value && $orig->{$key} ne $value)
) {
_print "# key ", _qq($key), " was ", _qq($orig->{$key}),
" now ", _qq($value), "\n";
$fail = 1;
}
} else {
_print "# key ", _qq($key), " is ", _qq($value),
", not in original.\n";
$fail = 1;
}
}
foreach (keys %$orig) {
# Force a hash recompute if this perl's internals can cache the hash key.
$_ = "" . $_;
next if (exists $suspect->{$_});
_print "# key ", _qq($_), " was ", _qq($orig->{$_}), " now missing.\n";
$fail = 1;
}
!$fail;
}
# We only provide a subset of the Test::More functionality.
sub require_ok ($) {
my ($require) = @_;
if ($require =~ tr/[A-Za-z0-9:.]//c) {
fail("Invalid character in \"$require\", passed to require_ok");
} else {
eval <<REQUIRE_OK;
require $require;
REQUIRE_OK
is($@, '', _where(), "require $require");
}
}
sub use_ok ($) {
my ($use) = @_;
if ($use =~ tr/[A-Za-z0-9:.]//c) {
fail("Invalid character in \"$use\", passed to use");
} else {
eval <<USE_OK;
use $use;
USE_OK
is($@, '', _where(), "use $use");
}
}
# runperl - Runs a separate perl interpreter and returns its output.
# Arguments :
# switches => [ command-line switches ]
# nolib => 1 # don't use -I../lib (included by default)
# non_portable => Don't warn if a one liner contains quotes
# prog => one-liner (avoid quotes)
# progs => [ multi-liner (avoid quotes) ]
# progfile => perl script
# stdin => string to feed the stdin (or undef to redirect from /dev/null)
# stderr => If 'devnull' suppresses stderr, if other TRUE value redirect
# stderr to stdout
# args => [ command-line arguments to the perl program ]
# verbose => print the command line
my $is_mswin = $^O eq 'MSWin32';
my $is_netware = $^O eq 'NetWare';
my $is_vms = $^O eq 'VMS';
my $is_cygwin = $^O eq 'cygwin';
sub _quote_args {
my ($runperl, $args) = @_;
foreach (@$args) {
# In VMS protect with doublequotes because otherwise
# DCL will lowercase -- unless already doublequoted.
$_ = q(").$_.q(") if $is_vms && !/^\"/ && length($_) > 0;
$runperl = $runperl . ' ' . $_;
}
return $runperl;
}
sub _create_runperl { # Create the string to qx in runperl().
my %args = @_;
my $runperl = which_perl();
if ($runperl =~ m/\s/) {
$runperl = qq{"$runperl"};
}
#- this allows, for example, to set PERL_RUNPERL_DEBUG=/usr/bin/valgrind
if ($ENV{PERL_RUNPERL_DEBUG}) {
$runperl = "$ENV{PERL_RUNPERL_DEBUG} $runperl";
}
unless ($args{nolib}) {
$runperl = $runperl . ' "-I../lib"'; # doublequotes because of VMS
}
if ($args{switches}) {
local $Level = 2;
die "test.pl:runperl(): 'switches' must be an ARRAYREF " . _where()
unless ref $args{switches} eq "ARRAY";
$runperl = _quote_args($runperl, $args{switches});
}
if (defined $args{prog}) {
die "test.pl:runperl(): both 'prog' and 'progs' cannot be used " . _where()
if defined $args{progs};
$args{progs} = [split /\n/, $args{prog}, -1]
}
if (defined $args{progs}) {
die "test.pl:runperl(): 'progs' must be an ARRAYREF " . _where()
unless ref $args{progs} eq "ARRAY";
foreach my $prog (@{$args{progs}}) {
if (!$args{non_portable}) {
if ($prog =~ tr/'"//) {
warn "quotes in prog >>$prog<< are not portable";
}
if ($prog =~ /^([<>|]|2>)/) {
warn "Initial $1 in prog >>$prog<< is not portable";
}
if ($prog =~ /&\z/) {
warn "Trailing & in prog >>$prog<< is not portable";
}
}
if ($is_mswin || $is_netware || $is_vms) {
$runperl = $runperl . qq ( -e "$prog" );
}
else {
$runperl = $runperl . qq ( -e '$prog' );
}
}
} elsif (defined $args{progfile}) {
$runperl = $runperl . qq( "$args{progfile}");
} else {
# You probably didn't want to be sucking in from the upstream stdin
die "test.pl:runperl(): none of prog, progs, progfile, args, "
. " switches or stdin specified"
unless defined $args{args} or defined $args{switches}
or defined $args{stdin};
}
if (defined $args{stdin}) {
# so we don't try to put literal newlines and crs onto the
# command line.
$args{stdin} =~ s/\n/\\n/g;
$args{stdin} =~ s/\r/\\r/g;
if ($is_mswin || $is_netware || $is_vms) {
$runperl = qq{$Perl -e "print qq(} .
$args{stdin} . q{)" | } . $runperl;
}
else {
$runperl = qq{$Perl -e 'print qq(} .
$args{stdin} . q{)' | } . $runperl;
}
} elsif (exists $args{stdin}) {
# Using the pipe construction above can cause fun on systems which use
# ksh as /bin/sh, as ksh does pipes differently (with one less process)
# With sh, for the command line 'perl -e 'print qq()' | perl -e ...'
# the sh process forks two children, which use exec to start the two
# perl processes. The parent shell process persists for the duration of
# the pipeline, and the second perl process starts with no children.
# With ksh (and zsh), the shell saves a process by forking a child for
# just the first perl process, and execing itself to start the second.
# This means that the second perl process starts with one child which
# it didn't create. This causes "fun" when if the tests assume that
# wait (or waitpid) will only return information about processes
# started within the test.
# They also cause fun on VMS, where the pipe implementation returns
# the exit code of the process at the front of the pipeline, not the
# end. This messes up any test using OPTION FATAL.
# Hence it's useful to have a way to make STDIN be at eof without
# needing a pipeline, so that the fork tests have a sane environment
# without these surprises.
# /dev/null appears to be surprisingly portable.
$runperl = $runperl . ($is_mswin ? ' <nul' : ' </dev/null');
}
if (defined $args{args}) {
$runperl = _quote_args($runperl, $args{args});
}
if (exists $args{stderr} && $args{stderr} eq 'devnull') {
$runperl = $runperl . ($is_mswin ? ' 2>nul' : ' 2>/dev/null');
}
elsif ($args{stderr}) {
$runperl = $runperl . ' 2>&1';
}
if ($args{verbose}) {
my $runperldisplay = $runperl;
$runperldisplay =~ s/\n/\n\#/g;
_print_stderr "# $runperldisplay\n";
}
return $runperl;
}
# sub run_perl {} is alias to below
sub runperl {
die "test.pl:runperl() does not take a hashref"
if ref $_[0] and ref $_[0] eq 'HASH';
my $runperl = &_create_runperl;
my $result;
my $tainted = ${^TAINT};
my %args = @_;
exists $args{switches} && grep m/^-T$/, @{$args{switches}} and $tainted = $tainted + 1;
if ($tainted) {
# We will assume that if you're running under -T, you really mean to
# run a fresh perl, so we'll brute force launder everything for you
my $sep;
if (! eval {require Config; 1}) {
warn "test.pl had problems loading Config: $@";
$sep = ':';
} else {
$sep = $Config::Config{path_sep};
}
my @keys = grep {exists $ENV{$_}} qw(CDPATH IFS ENV BASH_ENV);
local @ENV{@keys} = ();
# Untaint, plus take out . and empty string:
local $ENV{'DCL$PATH'} = $1 if $is_vms && exists($ENV{'DCL$PATH'}) && ($ENV{'DCL$PATH'} =~ /(.*)/s);
$ENV{PATH} =~ /(.*)/s;
local $ENV{PATH} =
join $sep, grep { $_ ne "" and $_ ne "." and -d $_ and
($is_mswin or $is_vms or !(stat && (stat _)[2]&0022)) }
split quotemeta ($sep), $1;
if ($is_cygwin) { # Must have /bin under Cygwin
if (length $ENV{PATH}) {
$ENV{PATH} = $ENV{PATH} . $sep;
}
$ENV{PATH} = $ENV{PATH} . '/bin';
}
$runperl =~ /(.*)/s;
$runperl = $1;
$result = `$runperl`;
} else {
$result = `$runperl`;
}
$result =~ s/\n\n/\n/g if $is_vms; # XXX pipes sometimes double these
return $result;
}
# Nice alias
*run_perl = *run_perl = \&runperl; # shut up "used only once" warning
sub DIE {
_print_stderr "# @_\n";
exit 1;
}
# A somewhat safer version of the sometimes wrong $^X.
sub which_perl {
unless (defined $Perl) {
$Perl = $^X;
# VMS should have 'perl' aliased properly
return $Perl if $is_vms;
my $exe;
if (! eval {require Config; 1}) {
warn "test.pl had problems loading Config: $@";
$exe = '';
} else {
$exe = $Config::Config{_exe};
}
$exe = '' unless defined $exe;
# This doesn't absolutize the path: beware of future chdirs().
# We could do File::Spec->abs2rel() but that does getcwd()s,
# which is a bit heavyweight to do here.
if ($Perl =~ /^perl\Q$exe\E$/i) {
my $perl = "perl$exe";
if (! eval {require File::Spec; 1}) {
warn "test.pl had problems loading File::Spec: $@";
$Perl = "./$perl";
} else {
$Perl = File::Spec->catfile(File::Spec->curdir(), $perl);
}
}
# Build up the name of the executable file from the name of
# the command.
if ($Perl !~ /\Q$exe\E$/i) {
$Perl = $Perl . $exe;
}
warn "which_perl: cannot find $Perl from $^X" unless -f $Perl;
# For subcommands to use.
$ENV{PERLEXE} = $Perl;
}
return $Perl;
}
sub unlink_all {
my $count = 0;
foreach my $file (@_) {
1 while unlink $file;
if( -f $file ){
_print_stderr "# Couldn't unlink '$file': $!\n";
}else{
++$count;
}
}
$count;
}
# _num_to_alpha - Returns a string of letters representing a positive integer.
# Arguments :
# number to convert
# maximum number of letters
# returns undef if the number is negative
# returns undef if the number of letters is greater than the maximum wanted
# _num_to_alpha( 0) eq 'A';
# _num_to_alpha( 1) eq 'B';
# _num_to_alpha(25) eq 'Z';
# _num_to_alpha(26) eq 'AA';
# _num_to_alpha(27) eq 'AB';
my @letters = qw(A B C D E F G H I J K L M N O P Q R S T U V W X Y Z);
# Avoid ++ -- ranges split negative numbers
sub _num_to_alpha{
my($num,$max_char) = @_;
return unless $num >= 0;
my $alpha = '';
my $char_count = 0;
$max_char = 0 if $max_char < 0;
while( 1 ){
$alpha = $letters[ $num % 26 ] . $alpha;
$num = int( $num / 26 );
last if $num == 0;
$num = $num - 1;
# char limit
next unless $max_char;
$char_count = $char_count + 1;
return if $char_count == $max_char;
}
return $alpha;
}
my %tmpfiles;
END { unlink_all keys %tmpfiles }
# A regexp that matches the tempfile names
$::tempfile_regexp = 'tmp\d+[A-Z][A-Z]?';
# Avoid ++, avoid ranges, avoid split //
my $tempfile_count = 0;
sub tempfile {
while(1){
my $try = "tmp$$";
my $alpha = _num_to_alpha($tempfile_count,2);
last unless defined $alpha;
$try = $try . $alpha;
$tempfile_count = $tempfile_count + 1;
# Need to note all the file names we allocated, as a second request may
# come before the first is created.
if (!$tmpfiles{$try} && !-e $try) {
# We have a winner
$tmpfiles{$try} = 1;
return $try;
}
}
die "Can't find temporary file name starting \"tmp$$\"";
}
# register_tempfile - Adds a list of files to be removed at the end of the current test file
# Arguments :
# a list of files to be removed later
# returns a count of how many file names were actually added
# Reuses %tmpfiles so that tempfile() will also skip any files added here
# even if the file doesn't exist yet.
sub register_tempfile {
my $count = 0;
for( @_ ){
if( $tmpfiles{$_} ){
_print_stderr "# Temporary file '$_' already added\n";
}else{
$tmpfiles{$_} = 1;
$count = $count + 1;
}
}
return $count;
}
# This is the temporary file for _fresh_perl
my $tmpfile = tempfile();
sub _fresh_perl {
my($prog, $action, $expect, $runperl_args, $name) = @_;
# Given the choice of the mis-parsable {}
# (we want an anon hash, but a borked lexer might think that it's a block)
# or relying on taking a reference to a lexical
# (\ might be mis-parsed, and the reference counting on the pad may go
# awry)
# it feels like the least-worse thing is to assume that auto-vivification
# works. At least, this is only going to be a run-time failure, so won't
# affect tests using this file but not this function.
$runperl_args->{progfile} ||= $tmpfile;
$runperl_args->{stderr} = 1 unless exists $runperl_args->{stderr};
open TEST, ">$tmpfile" or die "Cannot open $tmpfile: $!";
print TEST $prog;
close TEST or die "Cannot close $tmpfile: $!";
my $results = runperl(%$runperl_args);
my $status = $?;
# Clean up the results into something a bit more predictable.
$results =~ s/\n+$//;
$results =~ s/at\s+$::tempfile_regexp\s+line/at - line/g;
$results =~ s/of\s+$::tempfile_regexp\s+aborted/of - aborted/g;
# bison says 'parse error' instead of 'syntax error',
# various yaccs may or may not capitalize 'syntax'.
$results =~ s/^(syntax|parse) error/syntax error/mig;
if ($is_vms) {
# some tests will trigger VMS messages that won't be expected
$results =~ s/\n?%[A-Z]+-[SIWEF]-[A-Z]+,.*//;
# pipes double these sometimes
$results =~ s/\n\n/\n/g;
}
# Use the first line of the program as a name if none was given
unless( $name ) {
($first_line, $name) = $prog =~ /^((.{1,50}).*)/;
$name = $name . '...' if length $first_line > length $name;
}
# Historically this was implemented using a closure, but then that means
# that the tests for closures avoid using this code. Given that there
# are exactly two callers, doing exactly two things, the simpler approach
# feels like a better trade off.
my $pass;
if ($action eq 'eq') {
$pass = is($results, $expect, $name);
} elsif ($action eq '=~') {
$pass = like($results, $expect, $name);
} else {
die "_fresh_perl can't process action '$action'";
}