Report when no coverage data is found. Fixes #12

StevenLooman · Feb 21, 2016 · 593b33a · 593b33a
1 parent ff08a13
commit 593b33a
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/lib/lcov.js b/lib/lcov.js
@@ -18,7 +18,11 @@ function LCov(runner) {
   runner.on('end', function(){
     // In a browser context, coverage will be in window.$jscoverage or window._$blanket.
     var g = typeof(global) != 'undefined' ? global : window;
-    var cov = g._$jscoverage || g._$blanket || {};
+    var cov = g._$jscoverage || g._$blanket;
+    if (!cov) {
+        console.error('mocha-lcov-reporter: No coverage data found, make sure your code is properly instrumented');
+        return;
+    }
 
     for (var filename in cov) {
       var data = cov[filename];