envutil.rb: improve assert_no_memory_leak

* test/ruby/envutil.rb (assert_no_memory_leak): allow envirionment
  variables keyword options.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43337 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/envutil.rb

@@ -334,23 +334,25 @@ eom
         assert_warning(*args) {$VERBOSE = false; yield}
       end
 
-      def assert_no_memory_leak(args, prepare, code, message=nil, limit: 1.5)
+      def assert_no_memory_leak(args, prepare, code, message=nil, limit: 1.5, **opt)
         token = "\e[7;1m#{$$.to_s}:#{Time.now.strftime('%s.%L')}:#{rand(0x10000).to_s(16)}:\e[m"
         token_dump = token.dump
         token_re = Regexp.quote(token)
+        envs = args.shift if Array === args and Hash === args.first
         args = [
           "--disable=gems",
           "-r", File.expand_path("../memory_status", __FILE__),
           *args,
           "-v", "-",
         ]
+        args.unshift(envs) if envs
         cmd = [
           'END {STDERR.puts '"#{token_dump}"'"FINAL=#{Memory::Status.new.size}"}',
           prepare,
           'STDERR.puts('"#{token_dump}"'"START=#{$initial_size = Memory::Status.new.size}")',
           code,
         ].join("\n")
-        _, err, status = EnvUtil.invoke_ruby(args, cmd, true, true)
+        _, err, status = EnvUtil.invoke_ruby(args, cmd, true, true, **opt)
         before = err.sub!(/^#{token_re}START=(\d+)\n/, '') && $1.to_i
         after = err.sub!(/^#{token_re}FINAL=(\d+)\n/, '') && $1.to_i
         assert_equal([true, ""], [status.success?, err], message)