Fix #797: Iterate over brands as an array (#798)

test/unit/main.js

@@ -91,6 +91,34 @@ describe('Returns', function () {
         });
         done();
     });
+
+    it('works even when Array.prototype has been mangled', function(done) {
+        const result = withMangledArrayProto(() => new UAParser('').getResult());
+
+        function withMangledArrayProto(fn, key = 'isEmpty', value = function() { return this.length === 0; }) {
+            const originalValue = Array.prototype[key];
+            const restore = Object.hasOwnProperty.call(Array.prototype, key)
+                ? () => Array.prototype[key] = originalValue
+                : () => delete Array.prototype[key];
+
+            Array.prototype[key] = value;
+            const result = fn();
+            restore();
+
+            return result;
+        }
+
+        assert.deepEqual(result,
+            {
+                ua : '',
+                browser: { name: undefined, version: undefined, major: undefined, type: undefined },
+                cpu: { architecture: undefined },
+                device: { vendor: undefined, model: undefined, type: undefined },
+                engine: { name: undefined, version: undefined},
+                os: { name: undefined, version: undefined }
+        });
+        done();
+    });
 });
 
 describe('Extending Regex', function () {
@@ -353,4 +381,4 @@ describe('Read user-agent data from req.headers', function () {
         const { browser } = UAParser(reqHeaders);
         assert.strictEqual(browser.is('Midori'), true);
     });
-});
+});