1 files changed, 80 insertions, 0 deletions
diff --git a/gnu/usr.bin/perl/t/lib/io_linenum.t b/gnu/usr.bin/perl/t/lib/io_linenum.t
new file mode 100644
index 00000000000..35032152014
--- /dev/null
+++ b/gnu/usr.bin/perl/t/lib/io_linenum.t
@@ -0,0 +1,80 @@
+#!./perl
+
+# test added 29th April 1999 by Paul Johnson (pjcj@transeda.com)
+# updated    28th May   1999 by Paul Johnson
+
+my $File;
+
+BEGIN
+{
+  $File = __FILE__;
+  if (-d 't')
+  {
+    chdir 't';
+    $File =~ s/^t\W+//;                                 # Remove first directory
+  }
+  unshift @INC, '../lib' if -d '../lib';
+  require strict; import strict;
+}
+
+use Test;
+
+BEGIN { plan tests => 12 }
+
+use IO::File;
+
+sub lineno
+{
+  my ($f) = @_;
+  my $l;
+  $l .= "$. ";
+  $l .= $f->input_line_number;
+  $l .= " $.";                     # check $. before and after input_line_number
+  $l;
+}
+
+my $t;
+
+open (F, $File) or die $!;
+my $io = IO::File->new($File) or die $!;
+
+<F> for (1 .. 10);
+ok(lineno($io), "10 0 10");
+
+$io->getline for (1 .. 5);
+ok(lineno($io), "5 5 5");
+
+<F>;
+ok(lineno($io), "11 5 11");
+
+$io->getline;
+ok(lineno($io), "6 6 6");
+
+$t = tell F;                                        # tell F; provokes a warning
+ok(lineno($io), "11 6 11");
+
+<F>;
+ok(lineno($io), "12 6 12");
+
+select F;
+ok(lineno($io), "12 6 12");
+
+<F> for (1 .. 10);
+ok(lineno($io), "22 6 22");
+
+$io->getline for (1 .. 5);
+ok(lineno($io), "11 11 11");
+
+$t = tell F;
+# We used to have problems here before local $. worked.
+# input_line_number() used to use select and tell.  When we did the
+# same, that mechanism broke.  It should work now.
+ok(lineno($io), "22 11 22");
+
+{
+  local $.;
+  $io->getline for (1 .. 5);
+  ok(lineno($io), "16 16 16");
+}
+
+ok(lineno($io), "22 16 22");