Enhance the srctop, bldtop, data and result functions to check the result

This affects bldtop_dir, bldtop_file, srctop_dir, srctop_file,
data_dir, data_file, result_dir, and result_file.  They are all
enhanced to check that the resulting path really is a directory or a
file.  They only do this if the path exists.

This allows the tests to catch if these functions are used
incorrectly, even on systems where the syntax for directories and
files is the same.

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16523)

1 files changed, 43 insertions, 17 deletions

diff --git a/util/perl/OpenSSL/Test.pm b/util/perl/OpenSSL/Test.pm
index 00ef1832d3..3123c1d3ec 100644
--- a/util/perl/OpenSSL/Test.pm
+++ b/util/perl/OpenSSL/Test.pm
@@ -10,6 +10,7 @@ package OpenSSL::Test;
 use strict;
 use warnings;
 
+use Carp;
 use Test::More 0.96;
 
 use Exporter;
@@ -557,8 +558,11 @@ operating system.
 =cut
 
 sub bldtop_dir {
-    return __bldtop_dir(@_);	# This caters for operating systems that have
+    my $d = __bldtop_dir(@_);	# This caters for operating systems that have
 				# a very distinct syntax for directories.
+
+    croak "$d isn't a directory" if -e $d && ! -d $d;
+    return $d;
 }
 
 =over 4
@@ -576,7 +580,10 @@ operating system.
 =cut
 
 sub bldtop_file {
-    return __bldtop_file(@_);
+    my $f = __bldtop_file(@_);
+
+    croak "$f isn't a file" if -e $f && ! -f $f;
+    return $f;
 }
 
 =over 4
@@ -594,8 +601,11 @@ operating system.
 =cut
 
 sub srctop_dir {
-    return __srctop_dir(@_);	# This caters for operating systems that have
+    my $d = __srctop_dir(@_);	# This caters for operating systems that have
 				# a very distinct syntax for directories.
+
+    croak "$d isn't a directory" if -e $d && ! -d $d;
+    return $d;
 }
 
 =over 4
@@ -613,7 +623,10 @@ operating system.
 =cut
 
 sub srctop_file {
-    return __srctop_file(@_);
+    my $f = __srctop_file(@_);
+
+    croak "$f isn't a file" if -e $f && ! -f $f;
+    return $f;
 }
 
 =over 4
@@ -630,7 +643,10 @@ operating system.
 =cut
 
 sub data_dir {
-    return __data_dir(@_);
+    my $d = __data_dir(@_);
+
+    croak "$d isn't a directory" if -e $d && ! -d $d;
+    return $d;
 }
 
 =over 4
@@ -647,15 +663,20 @@ file path as a string, adapted to the local operating system.
 =cut
 
 sub data_file {
-    return __data_file(@_);
+    my $f = __data_file(@_);
+
+    croak "$f isn't a file" if -e $f && ! -f $f;
+    return $f;
 }
 
 =over 4
 
-=item B<result_dir>
+=item B<result_dir LIST>
 
-C<result_dir> returns the directory where test output files should be placed
-as a string, adapted to the local operating system.
+LIST is a list of directories that make up a path from the result directory
+associated with the test (see L</DESCRIPTION> above).
+C<result_dir> returns the resulting directory as a string, adapted to the local
+operating system.
 
 =back
 
@@ -664,17 +685,20 @@ as a string, adapted to the local operating system.
 sub result_dir {
     BAIL_OUT("Must run setup() first") if (! $test_name);
 
-    return catfile($directories{RESULTS});
+    my $d = catdir($directories{RESULTS},@_);
+
+    croak "$d isn't a directory" if -e $d && ! -d $d;
+    return $d;
 }
 
 =over 4
 
-=item B<result_file FILENAME>
+=item B<result_file LIST, FILENAME>
 
-FILENAME is the name of a test output file.
-C<result_file> returns the path of the given file as a string,
-prepending to the file name the path to the directory where test output files
-should be placed, adapted to the local operating system.
+LIST is a list of directories that make up a path from the data directory
+associated with the test (see L</DESCRIPTION> above) and FILENAME is the name
+of a file located in that directory path.  C<result_file> returns the resulting
+file path as a string, adapted to the local operating system.
 
 =back
 
@@ -683,8 +707,10 @@ should be placed, adapted to the local operating system.
 sub result_file {
     BAIL_OUT("Must run setup() first") if (! $test_name);
 
-    my $f = pop;
-    return catfile(result_dir(),@_,$f);
+    my $f = catfile(result_dir(),@_);
+
+    croak "$f isn't a file" if -e $f && ! -f $f;
+    return $f;
 }
 
 =over 4