#!./perl

use Test::More tests => 15;

use B::Terse;

# indent should return a string indented four spaces times the argument
is( B::Terse::indent(2), ' ' x 8, 'indent with an argument' );
is( B::Terse::indent(), '', 'indent with no argument' );

# this should fail without a reference
try { B::Terse::terse('scalar') };
like( $^EVAL_ERROR->{?description}, qr/not a reference/, 'terse() fed bad parameters' );

# now point it at a sub and see what happens
sub foo {}

my $sub;
try{ $sub = B::Terse::compile('', 'foo') };
is( $^EVAL_ERROR, '', 'compile()' );
ok( defined &$sub, 'valid subref back from compile()' );

# and point it at a real sub and hope the returned ops look alright
my $out = "";
open my $ouf_fh, '>>', \$out or die;
B::Concise::walk_output($ouf_fh);
$sub = B::Terse::compile('', 'bar');
$sub->();

# now build some regexes that should match the dumped ops
my @($hex, $op) = @('\(0x[a-f0-9]+\)', '\s+\w+');
my %ops = %( < @+: map { @: $_ => qr/$_ $hex$op/ },
	qw ( OP	COP LOOP PMOP UNOP BINOP LOGOP LISTOP PVOP ) );

# split up the output lines into individual ops (terse is, well, terse!)
# use an array here so $_ is modifiable
my @lines = split(m/\n+/, $out); $out = "";
foreach ( @lines) {
	next unless m/\S/;
	s/^\s+//;
	if (m/^([A-Z]+)\s+/) {
		my $op = $1;
		next unless exists %ops{$op};
		like( $_, %ops{?$op}, "$op " );
		s/%ops{?$op}//;
		delete %ops{$op};
		redo if $_;
	}
}

warn "# didn't find " . join(' ', keys %ops) if %ops;

# XXX:
# this tries to get at all tersified optypes in B::Terse
# if you can think of a way to produce AV, NULL, PADOP, or SPECIAL,
# add it to the regex above too. (PADOPs are currently only produced
# under ithreads, though).
#
our ($a, $b);
sub bar {
	# OP SVOP COP IV here or in sub definition
	my @bar = @(1, 2, 3);

	# got a GV here
	my $foo = $a + $b;

	# NV here
	$a = 1.234;

	# this is awful, but it gives a PMOP
	our @ary = split('', $foo);

	# PVOP, LOOP
	LOOP: for (1 .. 10) {
		last LOOP if $_ % 2;
	}

	# make a PV
	$foo = "a string";

	# make an OP_SUBSTCONT
	$foo =~ s/(a)/$1/;
}

# Schwern's example of finding an RV
my $path = join " ", map { qq["-I$_"] }, $^INCLUDE_PATH;
$path = '-I::lib -MMac::err=unix' if $^OS_NAME eq 'MacOS';
my $redir = $^OS_NAME eq 'MacOS' ?? '' !! "2>&1";
my $items = qx{$^EXECUTABLE_NAME $path "-MO=Terse" -le "print \$^STDOUT, \\42" $redir};
like( $items, qr/IV $hex \\42/, 'RV (but now stored in an IV)' );

package TieOut;

sub TIEHANDLE {
	bless( \(my $out), @_[0] );
}

sub PRINT {
	my $self = shift;
	$$self .= join('', @_);
}

sub PRINTF {
	my $self = shift;
	$$self .= sprintf(nelems @_);
}

sub read {
	my $self = shift;
	return substr($$self, 0, length($$self), '');
}