test: fix mock driver

Author: teo-nikolov

test/fixtures/driver.ts

@@ -7,15 +7,17 @@ import { W3C_ELEMENT_KEY } from '@appium/base-driver';
 export interface MockDriver {
     sendPowerShellCommand: ReturnType<typeof vi.fn>;
     log: { debug: ReturnType<typeof vi.fn>; info?: ReturnType<typeof vi.fn> };
-    assertFeatureEnabled?: ReturnType<typeof vi.fn>;
+    assertFeatureEnabled: ReturnType<typeof vi.fn>;
 }
 
 export function createMockDriver(overrides?: Partial<MockDriver>): MockDriver {
     const sendPowerShellCommand = vi.fn().mockResolvedValue('');
     const log = { debug: vi.fn(), info: vi.fn() };
+    const assertFeatureEnabled = vi.fn();
     const driver: MockDriver = {
         sendPowerShellCommand,
         log,
+        assertFeatureEnabled,
         ...overrides,
     };
     return driver;