How do you test code that uses directory operations (opendir/readdir)?

In Perl, testing code that uses directory operations such as opendir and readdir typically requires creating a temporary directory structure. This is often done using modules like File::Temp or File::Temp::Directory, which allow you to create temporary directories that can be used for testing without affecting the actual filesystem. Here’s a basic example of how to test directory operations in Perl:


        use strict;
        use warnings;
        use File::Temp qw(tempdir);
        
        # Create a temporary directory for testing
        my $temp_dir = tempdir(CLEANUP => 1);
        
        # Create some files in the temporary directory
        open my $fh, '>', "$temp_dir/file1.txt" or die "Can't create file: $!";
        close $fh;
        
        open my $fh2, '>', "$temp_dir/file2.txt" or die "Can't create file: $!";
        close $fh2;
        
        # Test the directory reading operations
        opendir(my $dir, $temp_dir) or die "Can't open directory: $!";
        my @files = readdir($dir);
        closedir($dir);
        
        # Check if we have the expected files
        print "Files in directory: @files\n";

How do you test code that uses directory operations (opendir/readdir)?

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How do you test code that uses directory operations (opendir/readdir)?

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