results.error now also accepts string as arg; changed img test to expect error

1 files changed, 12 insertions, 5 deletions

diff --git a/lib/results.js b/lib/results.js
index 043f1f9..2c89be3 100644
--- a/lib/results.js
+++ b/lib/results.js
@@ -46,11 +46,18 @@ function warning(message) {
 }
 
 function error(exception) {
-    return {
-        type: "error",
-        message: exception.message,
-        stack: exception.stack
-    };
+    if (typeof exception == 'string') {
+        return {
+            type: "error",
+            message: exception
+        };
+    } else {
+        return {
+            type: "error",
+            message: exception.message,
+            stack: exception.stack
+        };
+    }
 }
 
 function combineMessages(results) {