ole_param_ole_type should return "unknown type" string when ITypeInfo::GetFuncDesc failed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/win32ole/test_win32ole_variant_m.rb

@@ -0,0 +1,36 @@
+# You need RubyUnit and MS Excel and MSI to run this test script 
+
+begin
+  require 'win32ole'
+rescue LoadError
+end
+
+require "test/unit"
+
+if defined?(WIN32OLE::VARIANT)
+  class TestWin32OLE_VARIANT < Test::Unit::TestCase
+    include WIN32OLE::VARIANT
+    def test_variant
+      assert_equal(2, VT_I2)
+      assert_equal(3, VT_I4)
+      assert_equal(4, VT_R4)
+      assert_equal(5, VT_R8)
+      assert_equal(6, VT_CY)
+      assert_equal(7, VT_DATE)
+      assert_equal(8, VT_BSTR)
+      assert_equal(9, VT_DISPATCH)
+      assert_equal(10, VT_ERROR)
+      assert_equal(11, VT_BOOL)
+      assert_equal(12, VT_VARIANT)
+      assert_equal(13, VT_UNKNOWN)
+      assert_equal(16, VT_I1)
+      assert_equal(17, VT_UI1)
+      assert_equal(18, VT_UI2)
+      assert_equal(19, VT_UI4)
+      assert_equal(22, VT_INT)
+      assert_equal(23, VT_UINT)
+      assert_equal(0x2000, VT_ARRAY)
+      assert_equal(0x4000, VT_BYREF)
+    end
+  end
+end