#!./perl

# This is written in a peculiar style, since we're trying to avoid
# most of the constructs we'll be testing for.  (This comment is
# probably obsolete on the avoidance side, though still currrent
# on the peculiarity side.)

$| = 1;

# for testing TEST only
#BEGIN { require '../lib/strict.pm'; strict->import() };
#BEGIN { require '../lib/warnings.pm'; warnings->import() };

# Let tests know they're running in the perl core.  Useful for modules
# which live dual lives on CPAN.
$ENV{PERL_CORE} = 1;

# remove empty elements due to insertion of empty symbols via "''p1'" syntax
@ARGV = grep($_,@ARGV) if $^O eq 'VMS';
our $show_elapsed_time = $ENV{HARNESS_TIMER} || 0;

# Cheesy version of Getopt::Std.  Maybe we should replace it with that.
{
    my @argv = ();
    foreach my $idx (0..$#ARGV) {
	push( @argv, $ARGV[$idx] ), next unless $ARGV[$idx] =~ /^-(\S+)$/;
	$::core    = 1 if $1 eq 'core';
	$::verbose = 1 if $1 eq 'v';
	$::torture = 1 if $1 eq 'torture';
	$::with_utf8 = 1 if $1 eq 'utf8';
	$::with_utf16 = 1 if $1 eq 'utf16';
	$::bytecompile = 1 if $1 eq 'bytecompile';
	$::compile = 1 if $1 eq 'compile';
	$::taintwarn = 1 if $1 eq 'taintwarn';
	$ENV{PERL_CORE_MINITEST} = 1 if $1 eq 'minitest';
	if ($1 =~ /^deparse(,.+)?$/) {
	    $::deparse = 1;
	    $::deparse_opts = $1;
	}
    }
    @ARGV = @argv;
}

chdir 't' if -f 't/TEST';

die "You need to run \"make test\" first to set things up.\n"
  unless -e 'perl' or -e 'perl.exe' or -e 'perl.pm';

if ($ENV{PERL_3LOG}) { # Tru64 third(1) tool, see perlhack
    unless (-x 'perl.third') {
	unless (-x '../perl.third') {
	    die "You need to run \"make perl.third first.\n";
	}
	else {
	    print "Symlinking ../perl.third as perl.third...\n";
	    die "Failed to symlink: $!\n"
		unless symlink("../perl.third", "perl.third");
	    die "Symlinked but no executable perl.third: $!\n"
		unless -x 'perl.third';
	}
    }
}

# check leakage for embedders
$ENV{PERL_DESTRUCT_LEVEL} = 2 unless exists $ENV{PERL_DESTRUCT_LEVEL};

$ENV{EMXSHELL} = 'sh';        # For OS/2

# Roll your own File::Find!
use TestInit;
use File::Spec;
if ($show_elapsed_time) { require Time::HiRes }
my $curdir = File::Spec->curdir;
my $updir  = File::Spec->updir;

sub _find_tests {
    my($dir) = @_;
    opendir DIR, $dir or die "Trouble opening $dir: $!";
    foreach my $f (sort { $a cmp $b } readdir DIR) {
	next if $f eq $curdir or $f eq $updir or
	    $f =~ /^(?:CVS|RCS|SCCS|\.svn)$/;

	my $fullpath = File::Spec->catfile($dir, $f);

	_find_tests($fullpath) if -d $fullpath;
	$fullpath = VMS::Filespec::unixify($fullpath) if $^O eq 'VMS';
	push @ARGV, $fullpath if $f =~ /\.t$/;
    }
}

sub _quote_args {
    my ($args) = @_;
    my $argstring = '';

    foreach (split(/\s+/,$args)) {
       # In VMS protect with doublequotes because otherwise
       # DCL will lowercase -- unless already doublequoted.
       $_ = q(").$_.q(") if ($^O eq 'VMS') && !/^\"/ && length($_) > 0;
       $argstring .= ' ' . $_;
    }
    return $argstring;
}

sub _populate_hash {
    return map {$_, 1} split /\s+/, $_[0];
}

unless (@ARGV) {
    foreach my $dir (qw(base comp cmd run io op uni)) {
	_find_tests($dir);
    }
    _find_tests("lib") unless $::core;
    # Config.pm may be broken for make minitest. And this is only a refinement
    # for skipping tests on non-default builds, so it is allowed to fail.
    # What we want to to is make a list of extensions which we did not build.
    my $configsh = File::Spec->catfile($updir, "config.sh");
    my %skip;
    if (-f $configsh) {
	my (%extensions, %known_extensions);
	open FH, $configsh or die "Can't open $configsh: $!";
	while (<FH>) {
	    if (/^extensions=['"](.*)['"]$/) {
		# Deliberate string interpolation to avoid triggering possible
		# $1 resetting bugs.
		%extensions = _populate_hash ("$1");
	    }
	    elsif (/^known_extensions=['"](.*)['"]$/) {
		%known_extensions = _populate_hash ($1);
	    }
	}
	if (%extensions) {
	    if (%known_extensions) {
		foreach (keys %known_extensions) {
		    $skip{$_}++ unless $extensions{$_};
		}
	    } else {
		warn "No known_extensions line found in $configsh";
	    }
	} else {
	    warn "No extensions line found in $configsh";
	}
    }
    my $mani = File::Spec->catfile($updir, "MANIFEST");
    if (open(MANI, $mani)) {
	while (<MANI>) { # similar code in t/harness
	    if (m!^(ext/(\S+)/+(?:[^/\s]+\.t|test\.pl)|lib/\S+?(?:\.t|test\.pl))\s!) {
		my $t = $1;
		my $extension = $2;
		if (!$::core || $t =~ m!^lib/[a-z]!)
		{
		    if (defined $extension) {
			$extension =~ s!/t$!!;
			# XXX Do I want to warn that I'm skipping these?
			next if $skip{$extension};
		    }
		    my $path = File::Spec->catfile($updir, $t);
		    push @ARGV, $path;
		    $::path_to_name{$path} = $t;
		}
	    }
	}
	close MANI;
    } else {
	warn "$0: cannot open $mani: $!\n";
    }
    unless ($::core) {
	_find_tests('pod');
	_find_tests('x2p');
	_find_tests('japh') if $::torture;
    }
}

# Tests known to cause infinite loops for the perlcc tests.
# %::infinite = ( 'comp/require.t', 1, 'op/bop.t', 1, 'lib/hostname.t', 1 );
%::infinite = ();

if ($::deparse) {
    _testprogs('deparse', '',   @ARGV);
}
elsif( $::compile ) {
    _testprogs('compile', '',   @ARGV);
}
elsif( $::bytecompile ) {
    _testprogs('bytecompile', '', @ARGV);
}
elsif ($::with_utf16) {
    for my $e (0, 1) {
	for my $b (0, 1) {
	    print STDERR "# ENDIAN $e BOM $b\n";
	    my @UARGV;
	    for my $a (@ARGV) {
		my $u = $a . "." . ($e ? "l" : "b") . "e" . ($b ? "b" : "");
		my $f = $e ? "v" : "n";
		push @UARGV, $u;
		unlink($u);
		if (open(A, $a)) {
		    if (open(U, ">$u")) {
			print U pack("$f", 0xFEFF) if $b;
			while (<A>) {
			    print U pack("$f*", unpack("C*", $_));
			}
			close(U);
		    }
		    close(A);
		}
	    }
	    _testprogs('perl', '', @UARGV);
	    unlink(@UARGV);
	}
    }
}
else {
    _testprogs('compile', '',   @ARGV) if -e "../testcompile";
    _testprogs('perl',    '',   @ARGV);
}

sub _testprogs {
    my ($type, $args, @tests) = @_;

    print <<'EOT' if ($type eq 'compile');
------------------------------------------------------------------------------
TESTING COMPILER
------------------------------------------------------------------------------
EOT

    print <<'EOT' if ($type eq 'deparse');
------------------------------------------------------------------------------
TESTING DEPARSER
------------------------------------------------------------------------------
EOT

    print <<EOT if ($type eq 'bytecompile');
------------------------------------------------------------------------------
TESTING BYTECODE COMPILER
------------------------------------------------------------------------------
EOT

    $ENV{PERLCC_TIMEOUT} = 120
	  if ($type eq 'compile' && !$ENV{PERLCC_TIMEOUT});

    $::bad_files = 0;

    foreach my $t (@tests) {
      unless (exists $::path_to_name{$t}) {
	my $tname = File::Spec->catfile('t',$t);
	$tname = VMS::Filespec::unixify($tname) if $^O eq 'VMS';
	$::path_to_name{$t} = $tname;
      }
    }
    my $maxlen = 0;
    foreach (@::path_to_name{@tests}) {
	s/\.\w+\z/./;
	my $len = length ;
	$maxlen = $len if $len > $maxlen;
    }
    # + 3 : we want three dots between the test name and the "ok"
    my $dotdotdot = $maxlen + 3 ;
    my $valgrind = 0;
    my $valgrind_log = 'current.valgrind';
    my $total_files = @tests;
    my $good_files = 0;
    my $tested_files  = 0;
    my $totmax = 0;

    while (my $test = shift @tests) {
        my $test_start_time = $show_elapsed_time ? Time::HiRes::time() : 0;

	if ( $::infinite{$test} && $type eq 'compile' ) {
	    print STDERR "$test creates infinite loop! Skipping.\n";
	    next;
	}
	if ($test =~ /^$/) {
	    next;
	}
	if ($type eq 'deparse') {
	    if ($test eq "comp/redef.t") {
		# Redefinition happens at compile time
		next;
	    }
	    elsif ($test =~ m{lib/Switch/t/}) {
		# B::Deparse doesn't support source filtering
		next;
	    }
	}
	my $te = $::path_to_name{$test} . '.'
		    x ($dotdotdot - length($::path_to_name{$test}));

	if ($^O ne 'VMS') {  # defer printing on VMS due to piping bug
	    print $te;
	    $te = '';
	}

	# XXX DAPM %OVER not defined anywhere
	# $test = $OVER{$test} if exists $OVER{$test};

	open(SCRIPT,"<",$test) or die "Can't run $test.\n";
	$_ = <SCRIPT>;
	close(SCRIPT) unless ($type eq 'deparse');
	if ($::with_utf16) {
	    $_ =~ tr/\0//d;
	}
	my $switch;
	if (/#!.*\bperl.*\s-\w*([tT])/) {
	    $switch = qq{"-$1"};
	}
	else {
	    if ($::taintwarn) {
		# not all tests are expected to pass with this option
		$switch = '"-t"';
	    }
	    else {
		$switch = '';
	    }
	}

	my $test_executable; # for 'compile' tests
	my $file_opts = "";
	if ($type eq 'deparse') {
	    # Look for #line directives which change the filename
	    while (<SCRIPT>) {
		$file_opts .= ",-f$3$4"
			if /^#\s*line\s+(\d+)\s+((\w+)|"([^"]+)")/;
	    }
	    close(SCRIPT);
	}

	my $utf8 = $::with_utf8 ? '-I../lib -Mutf8' : '';
	my $testswitch = '-I. -MTestInit'; # -T will strict . from @INC
	if ($type eq 'deparse') {
	    my $deparse_cmd =
		"./perl $testswitch $switch -I../lib -MO=-qq,Deparse,-sv1.,".
		"-l$::deparse_opts$file_opts ".
		"$test > $test.dp ".
		"&& ./perl $testswitch $switch -I../lib $test.dp |";
	    open(RESULTS, $deparse_cmd)
		or print "can't deparse '$deparse_cmd': $!.\n";
	}
	elsif ($type eq 'bytecompile') {
	    my ($pwd, $null);
	    if( $^O eq 'MSWin32') {
		$pwd = `cd`;
		$null = 'nul';
	    } else {
		$pwd = `pwd`;
		$null = '/dev/null';
	    }
	    chomp $pwd;
	    my $perl = $ENV{PERL} || "$pwd/perl";
	    my $bswitch = "-MO=Bytecode,-H,-TI,-s$pwd/$test,";
	    $bswitch .= "-TF$test.plc,"
		if $test =~ m(chdir|pod/|CGI/t/carp|lib/DB);
	    $bswitch .= "-k,"
		if $test =~ m(deparse|terse|ext/Storable/t/code);
	    $bswitch .= "-b,"
		if $test =~ m(op/getpid);
	    my $bytecompile_cmd =
		"$perl $testswitch $switch -I../lib $bswitch".
		"-o$test.plc $test 2>$null &&".
		"$perl $testswitch $switch -I../lib $utf8 $test.plc |";
	    open(RESULTS,$bytecompile_cmd)
		or print "can't byte-compile '$bytecompile_cmd': $!.\n";
	}
	elsif ($type eq 'perl') {
	    my $perl = $ENV{PERL} || './perl';
	    my $redir = $^O eq 'VMS' ? '2>&1' : '';
	    if ($ENV{PERL_VALGRIND}) {
		my $valgrind = $ENV{VALGRIND} // 'valgrind';
		$perl = "$valgrind --suppressions=perl.supp --leak-check=yes "
			        . "--leak-resolution=high --show-reachable=yes "
			        . "--num-callers=50 --log-fd=3 $perl";
		$redir = "3>$valgrind_log";
	    }
	    my $run = "$perl" . _quote_args("$testswitch $switch $utf8")
			      . " $test $redir|";
	    open(RESULTS,$run) or print "can't run '$run': $!.\n";
	}
	else {
	    my $compile_cmd;
	    my $pl2c = "$testswitch -I../lib ../utils/perlcc --testsuite " .
	      # -O9 for good measure, -fcog is broken ATM
		       "$switch -Wb=-O9,-fno-cog -L .. " .
		       "-I \".. ../lib/CORE\" $args $utf8 $test -o ";

	    if( $^O eq 'MSWin32' ) {
		$test_executable = "$test.exe";
		# hopefully unused name...
		open HACK, "> xweghyz.pl";
		print HACK <<EOT;
#!./perl

open HACK, '.\\perl $pl2c $test_executable |';
# cl.exe prints the name of the .c file on stdout (\%^\$^#)
while(<HACK>) {m/^\\w+\\.[cC]\$/ && next;print}
open HACK, '$test_executable |';
while(<HACK>) {print}
EOT
		close HACK;
		$compile_cmd = 'xweghyz.pl |';
	    }
	    else {
		$test_executable = "$test.plc";
		$compile_cmd
		    = "./perl $pl2c $test_executable && $test_executable |";
	    }
	    unlink $test_executable if -f $test_executable;
	    open(RESULTS, $compile_cmd)
		or print "can't compile '$compile_cmd': $!.\n";
	}

	my $failure;
	my $next = 0;
	my $seen_leader = 0;
	my $seen_ok = 0;
	my $trailing_leader = 0;
	my $max;
	my %todo;
	while (<RESULTS>) {
	    next if /^\s*$/; # skip blank lines
	    if ($::verbose) {
		print $_;
	    }
	    unless (/^\#/) {
		if ($trailing_leader) {
		    # shouldn't be anything following a postfix 1..n
		    $failure = 'FAILED--extra output after trailing 1..n';
		    last;
		}
		if (/^1\.\.([0-9]+)( todo ([\d ]+))?/) {
		    if ($seen_leader) {
			$failure = 'FAILED--seen duplicate leader';
			last;
		    }
		    $max = $1;
		    %todo = map { $_ => 1 } split / /, $3 if $3;
		    $totmax += $max;
		    $tested_files++;
		    if ($seen_ok) {
			# 1..n appears at end of file
			$trailing_leader = 1;
			if ($next != $max) {
			    $failure = "FAILED--expected $max tests, saw $next";
			    last;
			}
		    }
		    else {
			$next = 0;
		    }
		    $seen_leader = 1;
		}
		else {
		    if (/^(not )?ok(?: (\d+))?[^\#]*(\s*\#.*)?/) {
			unless ($seen_leader) {
			    unless ($seen_ok) {
				$next = 0;
			    }
			}
			$seen_ok = 1;
			$next++;
			my($not, $num, $extra, $istodo) = ($1, $2, $3, 0);
			$num = $next unless $num;

			if ($num == $next) {

			    # SKIP is essentially the same as TODO for t/TEST
			    # this still conforms to TAP:
			    # http://search.cpan.org/dist/Test-Harness/lib/Test/Harness/TAP.pod
			    $extra and $istodo = $extra =~ /#\s*(?:TODO|SKIP)\b/;
			    $istodo = 1 if $todo{$num};

			    if( $not && !$istodo ) {
				$failure = "FAILED at test $num";
				last;
			    }
			}
			else {
			    $failure ="FAILED--expected test $next, saw test $num";
			    last;
			}
		    }
		    elsif (/^Bail out!\s*(.*)/i) { # magic words
			die "FAILED--Further testing stopped" . ($1 ? ": $1\n" : ".\n");
		    }
		    else {
			# module tests are allowed extra output,
			# because Test::Harness allows it
			next if $test =~ /^\W*(ext|lib)\b/;
			$failure = "FAILED--unexpected output at test $next";
			last;
		    }
		}
	    }
	}
	close RESULTS;

	if (not defined $failure) {
	    $failure = 'FAILED--no leader found' unless $seen_leader;
	}

	if ($ENV{PERL_VALGRIND}) {
	    my @valgrind;
	    if (-e $valgrind_log) {
		if (open(V, $valgrind_log)) {
		    @valgrind = <V>;
		    close V;
		} else {
		    warn "$0: Failed to open '$valgrind_log': $!\n";
		}
	    }
	    if (@valgrind) {
		my $leaks = 0;
		my $errors = 0;
		for my $i (0..$#valgrind) {
		    local $_ = $valgrind[$i];
		    if (/^==\d+== ERROR SUMMARY: (\d+) errors? /) {
			$errors += $1;   # there may be multiple error summaries
		    } elsif (/^==\d+== LEAK SUMMARY:/) {
			for my $off (1 .. 4) {
			    if ($valgrind[$i+$off] =~
				/(?:lost|reachable):\s+\d+ bytes in (\d+) blocks/) {
				$leaks += $1;
			    }
			}
		    }
		}
		if ($errors or $leaks) {
		    if (rename $valgrind_log, "$test.valgrind") {
			$valgrind++;
		    } else {
			warn "$0: Failed to create '$test.valgrind': $!\n";
		    }
		}
	    } else {
		warn "No valgrind output?\n";
	    }
	    if (-e $valgrind_log) {
		unlink $valgrind_log
		    or warn "$0: Failed to unlink '$valgrind_log': $!\n";
	    }
	}
	if ($type eq 'deparse') {
	    unlink "./$test.dp";
	}
	if ($ENV{PERL_3LOG}) {
	    my $tpp = $test;
	    $tpp =~ s:^\.\./::;
	    $tpp =~ s:/:_:g;
	    $tpp =~ s:\.t$:.3log:;
	    rename("perl.3log", $tpp) ||
		die "rename: perl3.log to $tpp: $!\n";
	}
	# test if the compiler compiled something
	if( $type eq 'compile' && !-e "$test_executable" ) {
	    $failure = "Test did not compile";
	}
	if (not defined $failure and $next != $max) {
	    $failure="FAILED--expected $max tests, saw $next";
	}

	if (defined $failure) {
	    print "${te}$failure\n";
	    $::bad_files++;
	    $_ = $test;
	    if (/^base/) {
		die "Failed a basic test--cannot continue.\n";
	    }
	}
	else {
	    if ($max) {
		my $elapsed;
		if ( $show_elapsed_time ) {
		    $elapsed = sprintf( " %8.0f ms", (Time::HiRes::time() - $test_start_time) * 1000 );
		}
		else {
		    $elapsed = "";
		}
		print "${te}ok$elapsed\n";
		$good_files++;
	    }
	    else {
		print "${te}skipping test on this platform\n";
		$tested_files -= 1;
	    }
	}
    } # while tests

    if ($::bad_files == 0) {
	if ($good_files) {
	    print "All tests successful.\n";
	    # XXX add mention of 'perlbug -ok' ?
	}
	else {
	    die "FAILED--no tests were run for some reason.\n";
	}
    }
    else {
	my $pct = $tested_files ? sprintf("%.2f", ($tested_files - $::bad_files) / $tested_files * 100) : "0.00";
	if ($::bad_files == 1) {
	    warn "Failed 1 test script out of $tested_files, $pct% okay.\n";
	}
	else {
	    warn "Failed $::bad_files test scripts out of $tested_files, $pct% okay.\n";
	}
	warn <<'SHRDLU_1';
### Since not all tests were successful, you may want to run some of
### them individually and examine any diagnostic messages they produce.
### See the INSTALL document's section on "make test".
SHRDLU_1
	warn <<'SHRDLU_2' if $good_files / $total_files > 0.8;
### You have a good chance to get more information by running
###   ./perl harness
### in the 't' directory since most (>=80%) of the tests succeeded.
SHRDLU_2
	if (eval {require Config; import Config; 1}) {
	    if ($::Config{usedl} && (my $p = $::Config{ldlibpthname})) {
		warn <<SHRDLU_3;
### You may have to set your dynamic library search path,
### $p, to point to the build directory:
SHRDLU_3
		if (exists $ENV{$p} && $ENV{$p} ne '') {
		    warn <<SHRDLU_4a;
###   setenv $p `pwd`:\$$p; cd t; ./perl harness
###   $p=`pwd`:\$$p; export $p; cd t; ./perl harness
###   export $p=`pwd`:\$$p; cd t; ./perl harness
SHRDLU_4a
		} else {
		    warn <<SHRDLU_4b;
###   setenv $p `pwd`; cd t; ./perl harness
###   $p=`pwd`; export $p; cd t; ./perl harness
###   export $p=`pwd`; cd t; ./perl harness
SHRDLU_4b
		}
		warn <<SHRDLU_5;
### for csh-style shells, like tcsh; or for traditional/modern
### Bourne-style shells, like bash, ksh, and zsh, respectively.
SHRDLU_5
	    }
	}
    }
    my ($user,$sys,$cuser,$csys) = times;
    print sprintf("u=%.2f  s=%.2f  cu=%.2f  cs=%.2f  scripts=%d  tests=%d\n",
	$user,$sys,$cuser,$csys,$tested_files,$totmax);
    if ($ENV{PERL_VALGRIND}) {
	my $s = $valgrind == 1 ? '' : 's';
	print "$valgrind valgrind report$s created.\n", ;
    }
}
exit ($::bad_files != 0);