Latest update.

test/recipes/61-test_bio_prefix.t

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+#! /usr/bin/env perl
+# Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+use strict;
+use warnings;
+
+use OpenSSL::Test qw(:DEFAULT data_file);
+use File::Compare qw(compare_text);
+
+setup('test_bio_prefix');
+
+my %input_result = (
+    'in1.txt'  => [ 'args1.pl', 'out1.txt' ],
+    'in2.txt' => [ 'args2.pl', 'out2.txt' ],
+);
+
+plan tests => 2 * scalar(keys %input_result);
+
+foreach (sort keys %input_result) {
+  SKIP: {
+      my $input_path = data_file($_);
+      my $args_path = data_file($input_result{$_}->[0]);
+      my $expected_path = data_file($input_result{$_}->[1]);
+      my $result_path = "test_bio_prefix-$_-stdout";
+      my @args = do $args_path;
+
+      skip "Problem prefixing $_", 1
+          unless ok(run(test([ 'bio_prefix_text', @args ],
+                             stdin => $input_path, stdout => $result_path)),
+                    "prefixing $_ with args " . join(' ', @args));
+      is(compare_text($result_path, $expected_path, \&cmp_line), 0,
+         "comparing the dump of $_ with $expected_path");
+    }
+}
+
+sub cmp_line {
+    return 0 if scalar @_ == 0;
+
+    if (scalar @_ != 2) {
+        diag "Lines to compare less than 2: ", scalar @_;
+        return -1;
+    }
+
+    $_[0] =~ s|\R$||;
+    $_[1] =~ s|\R$||;
+    my $r = $_[0] cmp $_[1];
+
+    diag "Lines differ:\n<: $_[0]\n>: $_[1]\n" unless $r == 0;
+    return $r;
+}