#!/usr/bin/perl
#
# This program will execute all programs in the "tests" directory. Each
# program is expected to produce output as follows on stdout:
#
# each line begins with a test name followed by whitespace followed by
# PASS, FAIL, or SKIP.
#
# stderr is not redirected during testing. Any test that might spam stderr
# is encouraged to redirect it somewhere useful.
#
# After each test script exits, a report indicating number passed, failed,
# and skipped is presented, or if the script failed to run.
#
# Once all tests have been run, a report showing the grand total number of
# tests performed, passed, failed, and skipped.
#
# Each test can be in any programming language that is appropriate for
# the task.
#
# Each test can assume the current directory is the root of the source tree.

use File::Basename;

$testdir = dirname($0) . '/tests';

opendir DH, $testdir;
while ($fe = readdir DH)
{
	next if ($fe =~ /^\./);
	next if ($fe =~ /~$/);
	
	$fn = $testdir . '/' . $fe;

	open P,"$fn|";
	while (<P>)
	{
		chomp;
		($tn, $ts) = split /\s+/;
		$testresults{$fe}{$tn} = $ts;
		if ($ts eq 'PASS')
		{
			$testspassed += 1;
			$testresults{$fe}{'..passed'} += 1;
		}
		elsif ($ts eq 'FAIL')
		{
			$testsfailed += 1;
			$testresults{$fe}{'..failed'} =+ 1;
		}
		elsif ($ts eq 'SKIP')
		{
			$testsskipped += 1;
			$testresults{$fe}{'..skipped'} += 1;
		}
		else
		{
			$testsunknown += 1;
			$testresults{$fe}{'..unknown'} += 1;
		}
		$teststotal += 1;
		$testresults{$fe}{'..total'} += 1;
	}
	close P;
	$fdn = $fe;
	$fdn =~ s/\..+?$//;
	$rline = sprintf("%-25.25s: %d/%d (%d skipped, %d unknown, %d failed)",  $fdn, $testresults{$fe}{'..passed'}, $testresults{$fe}{'..total'}, $testresults{$fe}{'..skipped'}, $testresults{$fe}{'..unknown'}, $testresults{$fe}{'..failed'});
	print "$rline\n";
}
closedir DH;

print sprintf("\n===================\nTotal: %d/%d (%d skipped, %d unknown, %d failed)\n", $testspassed, $teststotal, $testsskipped, $testsunknown, $testsfailed);

if ($testspassed < $teststotal)
{
	print "\nThe following tests either failed or were otherwise dubious:\n";
	foreach $i (keys %testresults)
	{
		$fdn = $i;
		$fdn =~ s/\..+?$//;
		foreach $j (keys %{ $testresults{$i} })
		{
			next if $j =~ /^\./;
			if ($testresults{$i}{$j} ne 'PASS')
			{
				print "$fdn/$j: $testresults{$i}{$j}\n";
			}
		}
	}
	exit 1;
}
exit 0;