fix: spyOn should not rely on hasOwnProperty from the spied object

The `spyOn` function uses `hasOwnProperty` from the spied object, but this method can be unavailable,
for example if the object has the `null` prototype, or if it is a proxy that filters some keys.

This arises in Vue 3 projects where the proxies returned by the framework do not expose all methods,
and forces the testing library to manually patch the proxies with `hasOwnProperty` to let Jest do its work
https://github.com/vuejs/vue-test-utils-next/blob/23d3d3e1f4178a87de5023f5255e0623653affdc/src/mount.ts#L493-L495

This commit changes the code to use `Object.prototype.hasOwnProperty` and fixes this issue.

Author: cexbrayat

packages/jest-mock/src/__tests__/index.test.ts

@@ -1216,6 +1216,18 @@ describe('moduleMocker', () => {
       expect(originalCallArguments[1]).toBe(secondArg);
       expect(spy).not.toHaveBeenCalled();
     });
+
+    it('should not rely on hasOwnProperty', () => {
+      const Foo = Object.assign(Object.create(null), {
+        foo() {},
+      });
+
+      const spy = moduleMocker.spyOn(Foo, 'foo');
+
+      Foo.foo();
+
+      expect(spy).toHaveBeenCalled();
+    });
   });
 
   describe('spyOnProperty', () => {

packages/jest-mock/src/index.ts

@@ -976,7 +976,10 @@ export class ModuleMocker {
         );
       }
 
-      const isMethodOwner = object.hasOwnProperty(methodName);
+      const isMethodOwner = Object.prototype.hasOwnProperty.call(
+        object,
+        methodName,
+      );
 
       let descriptor = Object.getOwnPropertyDescriptor(object, methodName);
       let proto = Object.getPrototypeOf(object);