source: vendor/perl/5.8.8/t/uni/sprintf.t

#!./perl -w

BEGIN {
    chdir 't' if -d 't';
    @INC = qw(../lib .);
    require "test.pl";
}

plan tests => 52;

$a = "B\x{fc}f";
$b = "G\x{100}r";
$c = 0x200;

{
    my $s = sprintf "%s", $a;
    is($s, $a, "%s a");
}

{
    my $s = sprintf "%s", $b;
    is($s, $b, "%s b");
}

{
    my $s = sprintf "%s%s", $a, $b;
    is($s, $a.$b, "%s%s a b");
}

{
    my $s = sprintf "%s%s", $b, $a;
    is($s, $b.$a, "%s%s b a");
}

{
    my $s = sprintf "%s%s", $b, $b;
    is($s, $b.$b, "%s%s b b");
}

{
    my $s = sprintf "%s$b", $a;
    is($s, $a.$b, "%sb a");
}

{
    my $s = sprintf "$b%s", $a;
    is($s, $b.$a, "b%s a");
}

{
    my $s = sprintf "%s$a", $b;
    is($s, $b.$a, "%sa b");
}

{
    my $s = sprintf "$a%s", $b;
    is($s, $a.$b, "a%s b");
}

{
    my $s = sprintf "$a%s", $a;
    is($s, $a.$a, "a%s a");
}

{
    my $s = sprintf "$b%s", $b;
    is($s, $b.$b, "a%s b");
}

{
    my $s = sprintf "%c", $c;
    is($s, chr($c), "%c c");
}

{
    my $s = sprintf "%s%c", $a, $c;
    is($s, $a.chr($c), "%s%c a c");
}

{
    my $s = sprintf "%c%s", $c, $a;
    is($s, chr($c).$a, "%c%s c a");
}

{
    my $s = sprintf "%c$b", $c;
    is($s, chr($c).$b, "%cb c");
}

{
    my $s = sprintf "%s%c$b", $a, $c;
    is($s, $a.chr($c).$b, "%s%cb a c");
}

{
    my $s = sprintf "%c%s$b", $c, $a;
    is($s, chr($c).$a.$b, "%c%sb c a");
}

{
    my $s = sprintf "$b%c", $c;
    is($s, $b.chr($c), "b%c c");
}

{
    my $s = sprintf "$b%s%c", $a, $c;
    is($s, $b.$a.chr($c), "b%s%c a c");
}

{
    my $s = sprintf "$b%c%s", $c, $a;
    is($s, $b.chr($c).$a, "b%c%s c a");
}

{
    # 20010407.008 sprintf removes utf8-ness
    $a = sprintf "\x{1234}";
    is((sprintf "%x %d", unpack("U*", $a), length($a)),    "1234 1",
       '\x{1234}');
    $a = sprintf "%s", "\x{5678}";
    is((sprintf "%x %d", unpack("U*", $a), length($a)),    "5678 1",
       '%s \x{5678}');
    $a = sprintf "\x{1234}%s", "\x{5678}";
    is((sprintf "%x %x %d", unpack("U*", $a), length($a)), "1234 5678 2",
       '\x{1234}%s \x{5678}');
}

{
    # check that utf8ness doesn't "accumulate"

    my $w = "w\x{fc}";
    my $sprintf;

    $sprintf = sprintf "%s%s", $w, "$w\x{100}";
    is(substr($sprintf,0,2), $w, "utf8 echo");

    $sprintf = sprintf "%s%s", $w, "$w\x{100}";    
    is(substr($sprintf,0,2), $w, "utf8 echo echo");
}

my @values =(chr 110, chr 255, chr 256);

foreach my $prefix (@values) {
    foreach my $vector (map {$_ . $_} @values) {

        my $format = "$prefix%*vd";

        foreach my $dot (@values) {
            my $result = sprintf $format, $dot, $vector;
            is (length $result, 8)
                or print "# ", join (',', map {ord $_} $prefix, $dot, $vector),
                  "\n";
        }
    }
}