feat: Make hasOwn handle null and undefined objects

Author: eFrane

src/shared/utils.js

@@ -5,6 +5,10 @@
  * @param {String} property
  */
 export function hasOwn (object, property) {
+  if (object === null || typeof object === 'undefined') {
+    return false
+  }
+
   return Object.prototype.hasOwnProperty.call(object, property)
 }
 

test/shared/utils.spec.js

@@ -20,6 +20,11 @@ test('has own checks for own properties', () => {
   expect(hasOwn(bar, 'baz')).toBeTruthy()
 })
 
+test('has own correctly falsifies on null and undefined', () => {
+  expect(hasOwn(null, 'foo')).toBeFalsy()
+  expect(hasOwn(undefined, 'foo')).toBeFalsy()
+})
+
 test('tells relative and absolute uris apart', () => {
   /**
    * List of `uri, is_absolute` pairs for testing.