All new

alle new

node_modules/qs/test/utils.js

@@ -604,6 +604,18 @@ test('isBuffer()', function (t) {
     var fakeBuffer = { constructor: Buffer };
     t.equal(utils.isBuffer(fakeBuffer), false, 'fake buffer is not a buffer');
 
+    forEach(['x', 1, true, {}, [], { isBuffer: true }], function (notCallable) {
+        var obj = { constructor: { isBuffer: notCallable } };
+        t.doesNotThrow(function () { utils.isBuffer(obj); }, 'non-callable `constructor.isBuffer` (' + inspect(notCallable) + ') does not throw');
+        t.equal(utils.isBuffer(obj), false, 'non-callable `constructor.isBuffer` (' + inspect(notCallable) + ') is not a buffer');
+    });
+
+    var nullObject = { __proto__: null, constructor: { __proto__: null, isBuffer: 'y' } };
+    t.equal(utils.isBuffer(nullObject), false, 'null object with non-callable `constructor.isBuffer` is not a buffer');
+
+    var duckBuffer = { constructor: { isBuffer: function () { return true; } } };
+    t.equal(utils.isBuffer(duckBuffer), true, 'callable `constructor.isBuffer` is still honored');
+
     var saferBuffer = SaferBuffer.from('abc');
     t.equal(utils.isBuffer(saferBuffer), true, 'SaferBuffer instance is a buffer');