source: trunk/essentials/dev-lang/perl/ext/XS/APItest/t/printf.t

BEGIN {
    chdir 't' if -d 't';
    @INC = '../lib';
    push @INC, "::lib:$MacPerl::Architecture:" if $^O eq 'MacOS';
    require Config; import Config;
    if ($Config{'extensions'} !~ /\bXS\/APItest\b/) {
        print "1..0 # Skip: XS::APItest was not built\n";
        exit 0;
    }
}

use Test::More tests => 11;

BEGIN { use_ok('XS::APItest') };

#########################

my $ldok = have_long_double();

# first some IO redirection
ok open(my $oldout, ">&STDOUT"), "saving STDOUT";
ok open(STDOUT, '>', "foo.out"),"redirecting STDOUT";

# Allow for it to be removed
END { unlink "foo.out"; };

select STDOUT; $| = 1; # make unbuffered

# Run the printf tests
print_double(5);
print_int(3);
print_long(4);
print_float(4);
print_long_double() if $ldok;  # val=7 hardwired

print_flush();

# Now redirect STDOUT and read from the file
ok open(STDOUT, ">&", $oldout), "restore STDOUT";
ok open(my $foo, "<foo.out"), "open foo.out";
#print "# Test output by reading from file\n";
# now test the output
my @output = map { chomp; $_ } <$foo>;
close $foo;
ok @output >= 4, "captured at least four output lines";

is($output[0], "5.000", "print_double");
is($output[1], "3", "print_int");
is($output[2], "4", "print_long");
is($output[3], "4.000", "print_float");

SKIP: {
   skip "No long doubles", 1 unless $ldok;
   is($output[4], "7.000", "print_long_double");
}