Add Platform's :os_type info to kitchen diagnose data.

lib/kitchen/instance.rb

@@ -229,7 +229,9 @@ def remote_exec(command)
     # @return [Hash] a diagnostic hash
     def diagnose
       result = Hash.new
-      [:state_file, :driver, :provisioner, :transport, :busser].each do |sym|
+      [
+        :platform, :state_file, :driver, :provisioner, :transport, :busser
+      ].each do |sym|
         obj = send(sym)
         result[sym] = obj.respond_to?(:diagnose) ? obj.diagnose : :unknown
       end

lib/kitchen/platform.rb

@@ -42,5 +42,12 @@ def initialize(options = {})
       end
       @os_type = options[:os_type]
     end
+
+    # Returns a Hash of configuration and other useful diagnostic information.
+    #
+    # @return [Hash] a diagnostic hash
+    def diagnose
+      { :os_type => os_type }
+    end
   end
 end

spec/kitchen/instance_spec.rb

@@ -302,6 +302,20 @@ def platform(name = "platform")
       instance.diagnose.must_be_instance_of Hash
     end
 
+    it "sets :platform key to platform's diagnose info" do
+      platform.stubs(:diagnose).returns(:a => "b")
+
+      instance.diagnose[:platform].must_equal(:a => "b")
+    end
+
+    it "sets :platform key to :unknown if obj can't respond to #diagnose" do
+      opts[:platform] = Class.new(platform.class) {
+        undef_method :diagnose
+      }.new(:name => "whoop")
+
+      instance.diagnose[:platform].must_equal :unknown
+    end
+
     it "sets :state_file key to state_file's diganose info" do
       state_file.stubs(:diagnose).returns(:a => "b")
 

spec/kitchen/platform_spec.rb

@@ -37,4 +37,10 @@
     klass.new(:name => "p", :os_type => "unicorn").os_type.must_equal "unicorn"
     klass.new(:name => "p", :os_type => nil).os_type.must_equal nil
   end
+
+  it "#diagnose returns a hash with sorted keys" do
+    opts[:os_type] = "unikitty"
+
+    klass.new(opts).diagnose.must_equal(:os_type => "unikitty")
+  end
 end