Resource id attribute added for the resources in the base class

Signed-off-by: Nikita Mathur <nikita.mathur@chef.io>

lib/inspec/resource.rb

@@ -34,6 +34,12 @@ module Inspec
       Inspec::Resource.support_registry[key].push(criteria)
     end
 
+    def self.resource_id(value = nil)
+      return (find_class_instance_variable(:@resource_id) || "") unless value
+
+      @resource_id = value
+    end
+
     # TODO: this is pretty terrible and is only here to work around
     # the idea that we've trained resource authors to make initialize
     # methods w/o calling super.

test/unit/resource_test.rb

@@ -44,12 +44,12 @@ describe Inspec::Resource do
   end
 
   describe "#example" do
-    it "will register a description" do
+    it "will register a example" do
       expected = rand.to_s
       _(create { example expected }.example).must_equal expected
     end
 
-    it "can change the description" do
+    it "can change the example" do
       c = create { example rand.to_s }
       c.example(x = rand.to_s)
       _(c.example).must_equal x
@@ -94,4 +94,17 @@ describe Inspec::Resource do
       Inspec::Resource.support_registry["os"] = nil
     end
   end
+
+  describe "resource_id" do
+    it "will register a resource_id" do
+      expected = rand.to_s
+      _(create { resource_id expected }.resource_id).must_equal expected
+    end
+
+    it "can change the resource_id" do
+      c = create { resource_id rand.to_s }
+      c.resource_id(x = rand.to_s)
+      _(c.resource_id).must_equal x
+    end
+  end
 end