CFINSPEC-96: Add zfs resource with new matcher

Signed-off-by: Sonu Saha <sonu.saha@progress.com>

lib/inspec/resources/zfs.rb

@@ -0,0 +1,46 @@
+require "inspec/resources/zfs_pool"
+
+module Inspec::Resources
+  class MyCustomResource < ZfsPool
+    # resource's internal name.
+    name "zfs"
+
+    # Restrict to only run on the below platforms
+    supports platform: "unix"
+
+    desc "Use the zfs InSpec audit resource to test if the named ZFS Pool is present and/or has certain properties."
+
+    example <<~EXAMPLE
+      describe zfs("new-pool") do
+        it { should exist }
+        it { should have_property({"failmode" => "wait", "capacity"=>"0"}) }
+      end
+    EXAMPLE
+
+    # Resource initialization is done in the parent class i.e. ZfsPool
+
+    # Unique identity for the resource.
+    def resource_id
+      # @zfs_pool is the zfs pool name assigned during initialization in the parent class i.e. ZfsPool
+      @zfs_pool
+    end
+
+    # Resource appearance in test reports.
+    def to_s
+      "zfs #{resource_id}"
+    end
+
+    # The below matcher checks if the given properties are valid properties of the zfs pool.
+    def has_property?(properties_hash)
+      raise Inspec::Exceptions::ResourceSkipped, "Provide a valid key-value pair of the zfs properties." if properties_hash.empty?
+
+      # Transform all the keys to string, since hash keys provided by user can be symbols or strings.
+      # @params is a hash populated in the parent class with the properties(key-value) of the current zfs pool.
+      # The keys in the @params are of string type.
+      properties_hash.transform_keys(&:to_s)
+
+      # check if the given properties is a subset of @params
+      properties_hash <= @params
+    end
+  end
+end