refs #9: enhance output of 'submit'

* show more error msg
* show failed testcase

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/submit.js

@@ -1,3 +1,4 @@
+var _ = require('underscore');
 var util = require('util');
 
 var core = require('../core');
@@ -10,6 +11,8 @@ var cmd = {
   }
 };
 
+var INDENT = '    ';
+
 cmd.handler = function(argv) {
   var keyword = h.getFilename(argv.filename);
   core.getProblem(keyword, function(e, problem) {
@@ -26,25 +29,39 @@ cmd.handler = function(argv) {
 
       var runOk = result.run_success;
 
-      if (!ok && runOk) {
-        console.log(util.format('input:\n%s', result.input));
-      }
-
       var line = util.format(' %s', h.statusToName(result.status_code));
-      console.log('    ' + h.prettyText(line, ok));
+      console.log(INDENT + h.prettyText(line, ok));
 
+      // show "xxx_error" message
+      _.chain(result)
+       .pick(function(v, k, obj) {
+         return /_error$/.test(k) && v.length > 0;
+       })
+       .values()
+       .each(function(v) {
+         console.log(INDENT + h.prettyText(' ' + v, ok));
+       });
+
+      // show success ratio
       line = util.format(' %d/%d cases passed (%s)',
           result.total_correct,
           result.total_testcases,
           result.status_runtime);
-      console.log('    ' + h.prettyText(line, ok));
+      console.log(INDENT + h.prettyText(line, ok));
+
+      // show testcase
+      var testcase = result.input || result.last_testcase;
+      if (!ok && testcase) {
+        line = util.format(' testcase: %s', util.inspect(testcase));
+        console.log(INDENT + h.prettyText(line, ok));
+      }
 
       if (!ok && runOk) {
         line = util.format(' output:   %s', result.code_output);
-        console.log('    ' + h.prettyText(line, ok));
+        console.log(INDENT + h.prettyText(line, ok));
 
         line = util.format(' expected: %s', result.expected_output);
-        console.log('    ' + h.prettyText(line, ok));
+        console.log(INDENT + h.prettyText(line, ok));
       }
 
       // update this problem status in local cache