Prefer user.clear() to reset value

Author: colinrotherham

packages/nhsuk-frontend/src/nhsuk/components/stepper-input/stepper-input.jsdom.test.mjs

@@ -211,8 +211,7 @@ describe('Stepper input', () => {
       })
 
       it('steps up from 1 if the input is empty and min is 0', async () => {
-        $input.value = ''
-
+        await user.clear($input)
         await user.click($stepUpButton)
 
         expect($input).toHaveValue(1)
@@ -233,8 +232,7 @@ describe('Stepper input', () => {
       })
 
       it('steps down to min value if the input is empty', async () => {
-        $input.value = ''
-
+        await user.clear($input)
         await user.click($stepDownButton)
 
         expect($input).toHaveValue(0)