use v6-alpha;
use Test;

# L<S16/"Filehandles, files, and directories"/"open">
# L<S16/"Filehandles, files, and directories"/"close">

plan 37;

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

my $filename = 'tempfile';

{ # write the file first
    my $fh = open($filename, :w);
    for (1 .. 6) -> $num {
        $fh.print("$num\n");
    }
    $fh.close();
}

{ # now read it in and check
    my $fh = open($filename);
    for (1 .. 6) -> $num {
        my $line = =$fh;
        is($line, "$num", '... got the right line (array controlled loop)');
    }
    $fh.close();
}

{ # now read it in with the $fh controling the loop
    my $fh = open($filename);
    my $num = 1;
    for (=$fh) -> $line {
        is($line, "$num", '... got the right line ((=$fh) controlled loop)');
        $num++;
    }
    $fh.close();
}

{ # now read it in with the $fh controling the loop w/out parens
    my $fh = open($filename);
    my $num = 1;
    for =$fh -> $line {
        is($line, "$num", '... got the right line (=$fh controlled loop)');
        $num++;
    }
    $fh.close();
}

## more complex loops

{ # now read it in and check
    my $fh = open($filename);
    my $num = 1;
    for (1 .. 3) -> $_num {
        my $line = =$fh;
        is($line, "$num", '... got the right line (array controlled loop)');
        $num++;
        my $line2 = =$fh;
        is($line2, "$num", '... got the right line2 (array controlled loop)');        
        $num++;        
    }
    $fh.close();
}

{ # now read it in with the $fh controling the loop but call 
  # the =$fh inside the loop inside parens (is this list context??)
    my $fh = open($filename);
    my $num = 1;
    for =$fh -> $line {
        is($line, "$num", '... got the right line ((=$fh) controlled loop)');
        $num++;
        my $line2 = =$fh;
        is($line2, "$num", '... got the right line2 ((=$fh) controlled loop)');
        $num++;
    }
    $fh.close();
}

{ # now read it in with the $fh controling the loop but call 
  # the =$fh inside the loop w/out parens (is this scalar context??)
    my $fh = open($filename);
    my $num = 1;
    for =$fh -> $line {
        is($line, "$num", '... got the right line (=$fh controlled loop)');
        $num++;
        my $line2 = =$fh;
        is($line2, "$num", '... got the right line2 (=$fh controlled loop)');
        $num++;
    }
    $fh.close();
}

# L<S16/"Filehandles, files, and directories"/"unlink">

is(unlink($filename), 1, 'file has been removed');