test_runner: use validateStringArray for timers.enable()

`apis` which is argument of `timers.enable()` is string array.
So use `validatStringArray` instead of `validateArray`. And
`options` is optional, so update JSDoc.

PR-URL: #49534
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

Author: deokjinkim

lib/internal/test_runner/mock/mock_timers.js

@@ -26,8 +26,8 @@ const {
 } = primordials;
 const {
   validateAbortSignal,
-  validateArray,
   validateNumber,
+  validateStringArray,
 } = require('internal/validators');
 
 const {
@@ -673,7 +673,7 @@ class MockTimers {
    */
   /**
    * Enables the MockTimers replacing the native timers with the fake ones.
-   * @param {EnableOptions} options
+   * @param {EnableOptions} [options]
    */
   enable(options = { __proto__: null, apis: SUPPORTED_APIS, now: 0 }) {
     const internalOptions = { __proto__: null, ...options };
@@ -693,7 +693,7 @@ class MockTimers {
       internalOptions.apis = SUPPORTED_APIS;
     }
 
-    validateArray(internalOptions.apis, 'options.apis');
+    validateStringArray(internalOptions.apis, 'options.apis');
     // Check that the timers passed are supported
     ArrayPrototypeForEach(internalOptions.apis, (timer) => {
       if (!ArrayPrototypeIncludes(SUPPORTED_APIS, timer)) {

test/parallel/test-runner-mock-timers.js

@@ -17,6 +17,14 @@ describe('Mock Timers Test Suite', () => {
       });
     });
 
+    it('should throw an error if data type of trying to enable a timer is not string', (t) => {
+      assert.throws(() => {
+        t.mock.timers.enable({ apis: [1] });
+      }, {
+        code: 'ERR_INVALID_ARG_TYPE',
+      });
+    });
+
     it('should throw an error if trying to enable a timer twice', (t) => {
       t.mock.timers.enable();
       assert.throws(() => {