Merge pull request #432 from INCF/chrisfilo-patch-12

[WIP] Improve header check robustness

Author: chrisgorgo

validators/tsv.js

@@ -86,21 +86,19 @@ var TSV = function TSV (file, contents, fileList, callback) {
 
     // events.tsv
     if (file.name.endsWith('_events.tsv')) {
-        if (headers[0] !== "onset"){
+        if ((headers.length == 0) || (headers[0] !== "onset")){
             issues.push(new Issue({
                 file: file,
                 evidence: headers,
                 line: 1,
-                character: rows[0].indexOf(headers[0]),
                 code: 20
             }));
         }
-        if (headers[1].trim() !== "duration"){
+        if ((headers.length == 1) || (headers[1].trim() !== "duration")){
             issues.push(new Issue({
                 file: file,
                 evidence: headers,
                 line: 1,
-                character: rows[0].indexOf(headers[1]),
                 code: 21
             }));
         }