Add DBus::Data, test and refactor PacketMarshaller, PacketUnmarshaller

NEWS.md

@@ -5,11 +5,15 @@
 API:
  * Renamed the DBus::Type::Type class to DBus::Type
    (which was previously a module).
+ * Introduced DBus::Data classes, use them in Properties.Get,
+   Properties.GetAll to return correct types as declared (still [#97][]).
 
 Bug fixes:
  * Signature validation: Ensure DBus.type produces a valid Type
  * Detect more malformed messages: non-NUL padding bytes, variants with
    multiple or no value.
+ * Added thorough tests (`spec/data/marshall.yaml`) to detect nearly all
+   invalid data at unmarshalling time.
 
 ## Ruby D-Bus 0.18.0.beta1 - 2022-02-24
 

examples/service/complex-property.rb

@@ -0,0 +1,21 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "dbus"
+
+# Complex property
+class Test < DBus::Object
+  dbus_interface "net.vidner.Scratch" do
+    dbus_attr_reader :progress, "(stttt)"
+  end
+
+  def initialize(opath)
+    @progress = ["working", 1, 0, 100, 42].freeze
+    super(opath)
+  end
+end
+
+bus = DBus::SessionBus.instance
+svc = bus.request_service("net.vidner.Scratch")
+svc.export(Test.new("/net/vidner/Scratch"))
+DBus::Main.new.tap { |m| m << bus }.run

lib/dbus.rb

@@ -14,6 +14,7 @@
 require_relative "dbus/auth"
 require_relative "dbus/bus"
 require_relative "dbus/bus_name"
+require_relative "dbus/data"
 require_relative "dbus/error"
 require_relative "dbus/introspect"
 require_relative "dbus/logger"
@@ -26,6 +27,7 @@
 require_relative "dbus/proxy_object"
 require_relative "dbus/proxy_object_factory"
 require_relative "dbus/proxy_object_interface"
+require_relative "dbus/raw_message"
 require_relative "dbus/type"
 require_relative "dbus/xml"
 
@@ -49,6 +51,10 @@ module DBus
                BIG_END
              end
 
+  # Comparing symbols is faster than strings
+  # @return [:little,:big]
+  HOST_ENDIANNESS = RawMessage.endianness(HOST_END)
+
   # General exceptions.
 
   # Exception raised when there is a problem with a type (may be unknown or