--- /dev/null
+##!/usr/local/bin/perl -w
+
+use strict ;
+use File::Slurp ;
+
+use Carp ;
+use Test::More tests => 9 ;
+
+my $file = 'missing/file' ;
+unlink $file ;
+
+
+my %modes = (
+ 'croak' => \&test_croak,
+ 'carp' => \&test_carp,
+ 'quiet' => \&test_quiet,
+) ;
+
+while( my( $mode, $sub ) = each %modes ) {
+
+ $sub->( 'read_file', \&read_file, $file, err_mode => $mode ) ;
+ $sub->( 'write_file', \&write_file, $file,
+ { err_mode => $mode }, 'junk' ) ;
+ $sub->( 'read_dir', \&read_dir, $file, err_mode => $mode ) ;
+}
+
+
+sub test_croak {
+
+ my ( $name, $sub, @args ) = @_ ;
+
+ eval {
+ $sub->( @args ) ;
+ } ;
+
+ ok( $@, "$name can croak" ) ;
+}
+
+sub test_carp {
+
+ my ( $name, $sub, @args ) = @_ ;
+
+ local $SIG{__WARN__} = sub { ok( 1, "$name can carp" ) } ;
+
+ $sub->( @args ) ;
+}
+
+sub test_quiet {
+
+ my ( $name, $sub, @args ) = @_ ;
+
+ local $SIG{__WARN__} = sub { ok( 0, "$name can be quiet" ) } ;
+
+ eval {
+ $sub->( @args ) ;
+ } ;
+
+ ok( !$@, "$name can be quiet" ) ;
+}