test_runner: fix date as function implementation

Signed-off-by: Lucas Santos <[email protected]>

Author: khaosdoctor

lib/internal/test_runner/mock/mock_timers.js

@@ -110,17 +110,18 @@ class MockTimers {
      * @returns {MockDate} a mocked Date object
      */
     function MockDate(year, month, date, hours, minutes, seconds, ms) {
+      const mockTimersSource = MockDate[kMock];
+      const nativeDate = mockTimersSource.#realDate;
       // As of the fake-timers implementation for Sinon
       // ref https://github.com/sinonjs/fake-timers/blob/a4c757f80840829e45e0852ea1b17d87a998388e/src/fake-timers-src.js#L456
       // This covers the Date constructor called as a function ref.
       // ECMA-262 Edition 5.1 section 15.9.2.
       // and ECMA-262 Edition 14 Section 21.4.2.1
       if (!(this instanceof MockDate)) {
-        return new this.#realDate(this.#now).toString();
+        return new nativeDate(mockTimersSource.#now).toString();
       }
 
-      const mockTimersSource = MockDate[kMock];
-      const nativeDate = mockTimersSource.#realDate;
+
 
       // Cases where Date is called as a constructor
       switch (arguments.length) {