test/main.rb in main-3.0.3 vs test/main.rb in main-4.0.0

@@ -28,10 +28,12 @@
     $VERBOSE=nil
     ARGV.replace argv
     ENV.clear
     env.each{|k,v| ENV[k.to_s]=v.to_s}
 
+    Main.push_ios!
+
     test = self
 
     factory = Main.factory(&block)
 
     program = factory.build(argv, env)
@@ -56,10 +58,12 @@
 
     main.run
 
     test.status ||= main.exit_status
 
+    Main.pop_ios!
+
     main
   end
 
  
 # basic test
@@ -597,11 +601,11 @@
         def run
           puts 42
         end
       }
     }
-    assert test(?e, sout.path)
-    assert IO.read(sout.path) == "42\n" 
+    assert test(?e, sout.path), 'sout exists'
+    assert IO.read(sout.path) == "42\n", 'sout has correct output'
   end
   def test_0370
     m = nil
     assert_nothing_raised{
       m = main{