property assertion should only accept strings if nested, fixes chaijs…

…#1043
solodynamo · Sep 9, 2017 · e167009 · e167009
1 parent dbeae08
commit e167009
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/lib/chai/core/assertions.js b/lib/chai/core/assertions.js
@@ -1765,6 +1765,12 @@ module.exports = function (chai, _) {
       , obj = flag(this, 'object')
       , ssfi = flag(this, 'ssfi');
 
+    if (typeof name !== 'string' && isNested) {
+      var msgPrefix = flag(this, 'message')
+      msgPrefix = msgPrefix ? msgPrefix + ': ' : ''
+      throw new AssertionError(msgPrefix + 'the argument to `property` must be a string')
+    }
+
     if (isNested && isOwn) {
       flagMsg = flagMsg ? flagMsg + ': ' : '';
       throw new AssertionError(