setSelected() converts value of <select> option to string

Hi,

I'm creating unit tests for a filter component with jest en VTU. I've noticed that when selecting a option from a <select> its value is automatically converted to string, even if the value of the option selected is a number. This is not the behaviour observed in the browser when manually selecting an option.

Steps to reproduce

Here is a simplified version of my code:
Component:

<template>
    <!-- other stuff -->
    <select
      v-model="filterData.pageSize"
      data-test="pageSize"
    >
      <option :value="null" hidden selected>
        Select option
      </option>
      <option
        v-for="(option, index) in pageSizeList"
        :key="index"
        :value="option.value"
      >
        {{ option.value }}
      </option>
    </select>
    <!-- other stuff -->
</template>
<script>
export default {
  data() {
    return {
      filterData: {
        $search: '',
        scopes: null,
        state: null,
        pageSize: 10
      }
    }
  },
  computed: {
    pageSizeList() {
      return [ // Notice how the value is type NUMBER
        { value: 10 },
        { value: 25 },
        { value: 50 },
        { value: 75 },
        { value: 100 }
      ]
    }
  },
  watch: {
    filterData: {
      handler(newData) {
         //newData.pageSize is of type number in browser but string in unit test

          // ....
          this.applyFilter()
        }
      },
      deep: true
    }
  },
  methods: {
    applyFilter() {
        // calls store mutation
    }
  }
}
</script>

test:

  test('If filter is not debounced when changing select box after searchstring', async () => {
    const wrapper = mount(filter, options)
    // ...

    await wrapper
      .findAll('[data-test="pageSize"] option')
      .at(2)
      .setSelected()

    console.log(typeof wrapper.vm.filterData.pageSize) // string ('25' instead of 25)

    expect(
      mockedStoreMutation.mock.calls[0][1]
        .pageSize
    ).toBe(25)
  })

Expected behaviour

When selecting an option using setSelected the value's type should be left unchanged.

Actual behaviour

setSelected changes the type of the value of the option to string.

expect(received).toBe(expected) // Object.is equality

    Expected: 25
    Received: "25"

      138 |       mockedStoreMutation.mock.calls[0][1]
      139 |         .pageSize
    > 140 |     ).toBe(25)
          |       ^
      141 |   })

Possible Solution

Don't change the type or update the docs with examples of how to use setValue and setSelected with non string values.