Fix t.pattern test, it supports glob

Author: aycabta

test/test_rake_test_task.rb

@@ -82,13 +82,19 @@ def test_libs_equals_empty
   end
 
   def test_pattern_equals
+    ['gl.rb', 'ob.rb'].each do |f|
+      create_file(f)
+    end
     tt = Rake::TestTask.new do |t|
       t.pattern = "*.rb"
     end
     assert_equal ["*.rb"], tt.file_list.to_a
   end
 
   def test_pattern_equals_test_files_equals
+    ['gl.rb', 'ob.rb'].each do |f|
+      create_file(f)
+    end
     tt = Rake::TestTask.new do |t|
       t.test_files = FileList["a.rb", "b.rb"]
       t.pattern = "*.rb"