Count skip tests

test/assert.rb

 $ok_test = 0
 $ko_test = 0
 $kill_test = 0
+$skip_test = 0
 $asserts  = []
 $test_start = Time.now if Object.const_defined?(:Time)
 
@@ -57,6 +58,7 @@ def assert(str = 'Assertion failed', iso = '')
     end
   rescue MRubyTestSkip => e
     $asserts.push(assertion_string('Skip: ', str, iso, e))
+    $skip_test += 1
     t_print('?')
   rescue Exception => e
     bt = e.backtrace if $mrbtest_verbose
@@ -220,12 +222,13 @@ def report()
     t_print("#{msg}\n")
   end
 
-  $total_test = $ok_test+$ko_test+$kill_test
+  $total_test = $ok_test + $ko_test + $kill_test + $skip_test
   t_print("Total: #{$total_test}\n")
 
   t_print("   OK: #{$ok_test}\n")
   t_print("   KO: #{$ko_test}\n")
   t_print("Crash: #{$kill_test}\n")
+  t_print(" Skip: #{$skip_test}\n")
 
   if Object.const_defined?(:Time)
     t_time = Time.now - $test_start