use v6;

use Test;

=begin pod

Test handling of C<-V> and C<-V:option>.

=end pod

# cf. unspecced/config.t for the same list
my @config = <
    archlib archname
    bin
    exe_ext
    file_sep
    installarchlib
    installbin
    installprivlib
    installscript
    installsitearch
    installsitebin
    installsitelib
    osname
    pager
    path_sep
    perl_revision
    perl_subversion
    perl_version
    prefix
    privlib
    pugspath
    scriptdir
    sitearch
    sitebin
    sitelib
    pugs_versnum
    pugs_version
    pugs_revision
>;

plan 1+@config*2+2;
if $*OS eq "browser" {
  skip_rest "Programs running in browsers don't have access to regular IO.";
  exit;
}

diag "Running under $*OS";

my $redir = ">";

sub nonce () { return (".{$*PID}." ~ (1..1000).pick) }
sub run_pugs ($c) {
  my $tempfile = "temp-ex-output" ~ nonce;
  my $command = "$*EXECUTABLE_NAME $c $redir $tempfile";
  diag $command;
  run $command;
  my $res = slurp $tempfile;
  unlink $tempfile;
  return $res;
}

my $pugs_config = run_pugs('-V');
like( $pugs_config, rx:Perl5/version.6\.\d+\.\d+,/, "Got some config data");

# Generalize this:
for @config -> $item {
  $pugs_config = run_pugs("-V:$item");
  my $local_sep = "\t$item: %?CONFIG{$item}\n";
  is( $pugs_config, $local_sep, "-V:$item works" );

  $pugs_config = run_pugs("-eprint -eq.code_was_run. -V:$item");
  $local_sep = "\t$item: %?CONFIG{$item}\n";
  is( $pugs_config, $local_sep, "-V:$item works even if other stuff is specified" );
};

my $nonexistent = run_pugs('-V:unknown_option_that_does_not_exist');
is $nonexistent, "\tunknown_option_that_does_not_exist: UNKNOWN\n", "Nonexistent options";

# -V:foo vs. -V foo
my $fullversion = run_pugs('-V unknown_option_that_does_not_exist');
isnt( index($fullversion, "This is Perl6 User's Golfing System"), -1, "-V foo vs. -V:foo")
  or diag $fullversion;