1 files changed, 16 insertions, 0 deletions
diff --git a/lib/etatsbasen.js b/lib/etatsbasen.js
index 377c113..22a268f 100644
--- a/lib/etatsbasen.js
+++ b/lib/etatsbasen.js
@@ -24,6 +24,9 @@ function emailIsInvalid(email) {
 }
 
 function filter(csvdata, includeOrgstructIds) {
+  if (! csvdata) {
+    throw new TypeError('Missing `data` argument');
+  }
   var headernameToIndex = {};
 
   if (includeOrgstructIds && !Array.isArray(includeOrgstructIds)) {
@@ -91,6 +94,10 @@ function renameHeader(data) {
 }
 
 function removeColumns(data) {
+  if (! data) {
+    throw new TypeError('Missing `data` argument');
+  }
+
   var columns = ['url_nb', 'url_en', 'kommunenummer',
                  'orgid', 'orgstructid', 'parentid'];
 
@@ -111,6 +118,9 @@ function removeColumns(data) {
 }
 
 function addTags(data) {
+  if (! data) {
+    throw new TypeError('Missing `data` argument');
+  }
   var orgstructidIndex;
   data.forEach(function(item, i) {
     if (0 === i) {
@@ -124,6 +134,9 @@ function addTags(data) {
 }
 
 function addURL(data) {
+  if (! data) {
+    throw new TypeError('Missing `data` argument');
+  }
   // create new column
   var urlenIndex=0;
   var urlnoIndex=0;
@@ -142,6 +155,9 @@ function addURL(data) {
 }
 
 function print(data) {
+  if (! data) {
+    throw new TypeError('Missing `data` argument');
+  }
   stringify(data, function(err, output) {
     if (err) {
       console.error(err);