use MSXML.DOMDocument instead of InternetExplorer.Application

* spec/ruby/library/win32ole/fixtures/event.xml use MSXML.DOMDocument
  instead of InternetExplorer.Application. InternetExplorer.Application
  is not available on some environments. Thanks to MSP-Greg (Greg L).
* spec/ruby/library/win32ole/win32ole_event/on_event_spec.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65414 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/library/win32ole/fixtures/event.xml

@@ -0,0 +1,4 @@
+<program>
+  <name>Ruby</name>
+  <version>trunk</version>
+</program>

spec/ruby/library/win32ole/win32ole_event/on_event_spec.rb

@@ -1,62 +1,70 @@
-require_relative '../fixtures/classes'
-
 platform_is :windows do
-  require 'win32ole'
+  require_relative '../fixtures/classes'
+  guard -> { WIN32OLESpecs::MSXML_AVAILABLE } do
 
-  def default_handler(event, *args)
-    @event += event
-  end
-
-  def alternate_handler(event, *args)
-    @event2 = "alternate"
-  end
-
-  def handler3(event, *args)
-    @event3 += event
-  end
-
-
-  describe "WIN32OLE_EVENT#on_event with no argument" do
-    before :each do
-      @ie     = WIN32OLESpecs.new_ole('InternetExplorer.Application')
-      @ev     = WIN32OLE_EVENT.new(@ie, 'DWebBrowserEvents')
-      @event  = ''
-      @event2 = ''
-      @event3 = ''
-      @ie.StatusBar = true
+    def handler_global(event, *args)
+      @event_global += event
     end
 
-    after :each do
-      @ie.Quit
+    def handler_specific(*args)
+      @event_specific = "specific"
     end
 
-    it "sets event handler properly, and the handler is invoked by event loop" do
-      @ev.on_event { |*args| default_handler(*args) }
-      @ie.StatusText='hello'
-      WIN32OLE_EVENT.message_loop
-      @event.should =~ /StatusTextChange/
+    def handler_spec_alt(*args)
+      @event_spec_alt = "spec_alt"
     end
 
-    it "accepts a String argument, sets event handler properly, and the handler is invoked by event loop" do
-      @ev.on_event("StatusTextChange") { |*args| @event = 'foo' }
-      @ie.StatusText='hello'
-      WIN32OLE_EVENT.message_loop
-      @event.should =~ /foo/
-    end
+    describe "WIN32OLE_EVENT#on_event" do
+      before :all do
+        @fn_xml = File.absolute_path "../fixtures/event.xml", __dir__
+      end
 
-    it "registers multiple event handlers for the same event" do
-      @ev.on_event("StatusTextChange") { |*args| default_handler(*args) }
-      @ev.on_event("StatusTextChange") { |*args| alternate_handler(*args) }
-      @ie.StatusText= 'hello'
-      WIN32OLE_EVENT.message_loop
-      @event2.should == 'alternate'
-    end
+      before :each do
+        @xml_dom = WIN32OLESpecs.new_ole 'MSXML.DOMDocument'
+        @xml_dom.async = true
+        @ev = WIN32OLE_EVENT.new @xml_dom
+        @event_global   = ''
+        @event_specific = ''
+        @event_spec_alt = ''
+      end
 
-    it "accepts a Symbol argument, sets event handler properly, and the handler is invoked by event loop" do
-      @ev.on_event(:StatusTextChange) { |*args| @event = 'foo' }
-      @ie.StatusText='hello'
-      WIN32OLE_EVENT.message_loop
-      @event.should =~ /foo/
+      after :each do
+        @xml_dom = nil
+        @ev = nil
+      end
+
+      it "sets global event handler properly, and the handler is invoked by event loop" do
+        @ev.on_event { |*args| handler_global(*args) }
+        @xml_dom.loadXML "<program><name>Ruby</name><version>trunk</version></program>"
+        WIN32OLE_EVENT.message_loop
+        @event_global.should =~ /onreadystatechange/
+      end
+
+      it "accepts a String argument and the handler is invoked by event loop" do
+        @ev.on_event("onreadystatechange") { |*args| @event = 'foo' }
+        @xml_dom.loadXML "<program><name>Ruby</name><version>trunk</version></program>"
+        WIN32OLE_EVENT.message_loop
+        @event.should =~ /foo/
+      end
+
+      it "accepts a Symbol argument and the handler is invoked by event loop" do
+        @ev.on_event(:onreadystatechange) { |*args| @event = 'bar' }
+        @xml_dom.loadXML "<program><name>Ruby</name><version>trunk</version></program>"
+        WIN32OLE_EVENT.message_loop
+        @event.should =~ /bar/
+      end
+
+      it "accepts a specific event handler and overrides a global event handler" do
+        @ev.on_event                       { |*args| handler_global(*args)   }
+        @ev.on_event("onreadystatechange") { |*args| handler_specific(*args) }
+        @ev.on_event("onreadystatechange") { |*args| handler_spec_alt(*args) }
+        @xml_dom.load @fn_xml
+        WIN32OLE_EVENT.message_loop
+        @event_global.should == 'ondataavailable'
+        @event_global.should_not =~ /onreadystatechange/
+        @event_specific.should == ''
+        @event_spec_alt.should == "spec_alt"
+      end
     end
   end
 end