Fix the bug that LeetCode cannot test (#27)

Author: jdneo

lib/commands/test.js

@@ -86,11 +86,14 @@ function runTest(argv) {
 
       results[0].your_input = problem.testcase;
       results[0].output = results[0].answer;
-      results[1].expected = results[1].answer;
+      // LeetCode-CN returns the actual and expected answer into two separate responses
+      if (results[1]) {
+        results[0].expected_answer = results[1].answer;
+      }
       results[0].stdout = results[0].stdout.slice(1, -1).replace(/\\n/g, '\n');
       printResult(results[0], null, 'your_input');
       printResult(results[0], results[0].runtime, 'output');
-      printResult(results[1], results[1].runtime, 'expected');
+      printResult(results[0], null, 'expected_answer');
       printResult(results[0], null, 'stdout');
     });
   });

lib/plugins/leetcode.js

@@ -266,6 +266,8 @@ function formatResult(result) {
     }
     x.stdout = util.inspect(output);
     x.answer = result.code_answer;
+    // LeetCode use 'expected_code_answer' to store the expected answer
+    x.expected_answer = result.expected_code_answer;
   } else {
     // It's submitting
     x.answer = result.code_output;
@@ -291,8 +293,12 @@ plugin.testProblem = function(problem, cb) {
 
     const tasks = [
       {type: 'Actual', id: task.interpret_id},
-      {type: 'Expected', id: task.interpret_expected_id}
     ];
+
+    // Used by LeetCode-CN
+    if (task.interpret_expected_id) {
+      tasks.push({type: 'Expected', id: task.interpret_expected_id});
+    }
     const q = new Queue(tasks, {opts: opts, results: []}, verifyResult);
     q.run(null, function(e, ctx) {
       return cb(e, ctx.results);