NoMethodError: undefined method `md5sum'

Question

When as the md5sum property added to the file resource type? The version of Serverspec reports md5sum as not found.

describe file ('/etc/sysctl.conf' ) do
   it { should be_file }
   its(:md5sum) { should eq '07a47f3db13458ebc93b334973cc8720' }
   its(:sha256sum) { should eq 'd63896fa456d47dde634c592d46d1d39cb6183fdbc450a2581b6f12d977ee2d1' }
   it { should be_mode 644 }
   it { should be_owned_by 'root' }
   it { should be_grouped_into 'root' }
end

 Failure/Error: its(:md5sum) { should eq '07a47f3db13458ebc93b334973cc8720' }
 NoMethodError: undefined method `md5sum' for File "/etc/sysctl.conf":Serverspec::Type::File

apt-cache show ruby-serverspec
Package: ruby-serverspec
Version: 1.14.0-2

Answer 1

It was added on August 10, 2014. It was apparently released with version 2.0.0 on October 8, 2014.