added enumeration to args and a spec to verify it

lib/resque_job_logging.rb

@@ -16,8 +16,7 @@ module ResqueJobLogging
       log_string += "status=complete "
     end
     log_string += "ms=#{time} "
-    arg_count = 1
+    args.each_with_index{|arg,idx| log_string += "arg#{idx.succ}=\"#{arg.to_s[0..30]}\" "}
-    args.each{|arg| log_string += "arg#{arg_count}=\"#{arg.to_s[0..30]}\" "}
 
     Rails.logger.info(log_string)
     raise error if error

spec/lib/resque_job_logging_spec.rb

@@ -0,0 +1,26 @@
+#   Copyright (c) 2010, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3 or later.  See
+#   the COPYRIGHT file.
+
+require 'spec_helper'
+
+describe ResqueJobLogging do
+  before do
+    Rails.stub!(:logger).and_return(mock())
+    Rails.logger.should_receive(:auto_flushing=).with(1)
+
+    Object.const_set("ResqueJobLoggingDummy", Class.new(Object))
+    ResqueJobLoggingDummy.extend(ResqueJobLogging)
+  end
+
+  after do
+    Rails.unstub!(:logger)
+  end
+
+  # http://bugs.joindiaspora.com/issues/741
+  it "should enumerate arguments" do
+    Rails.logger.should_receive(:info).with(/arg1="foo" arg2="bar" arg3="baz"/)
+    ## pass a nil block, so we can test the .info() output
+    ResqueJobLoggingDummy.around_perform_log_job("foo", "bar", "baz") {}
+  end
+end