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v-model not reacting to change on element.selected #345

@folmert

Description

@folmert

Simulating selecting radio buttons doesn't seem to be reflected in the model:

wrapperDeep.find('input[type="radio"]').element.selected = true;

Full code with the reproduced example:
https://github.com/folmert/vue-test-utils-jest-example


RadioGroup.vue:

<template>
    <div>
        <label><input v-model="folder" type="radio" name="folder" value="new"> New</label>
        <label><input v-model="folder" type="radio" name="folder" value="existing"> Existing</label>

        <div class="selected">Selected: {{folder}}</div>
    </div>
</template>

<script>
export default {
    name: 'RadioGroup',
    data () {
        return {
            folder: ''
        }
    }
}
</script>

RadioGroup.spec.js:

import {mount} from 'vue-test-utils';
import RadioGroup from '@/components/RadioGroup';

describe('RadioGroup', () => {
    let wrapperDeep;

    beforeEach(() => {
        wrapperDeep = mount(RadioGroup, {});
    });

    // works
    it('changes data according to the changed folder data', () => {
        wrapperDeep.setData({folder: 'existing'});
        expect(wrapperDeep.find('.selected').text()).toBe('Selected: existing');
    });

    // doesn't work
    it('changes data according to the selected folder option', () => {
        wrapperDeep.find('input[type="radio"][value="existing"]').element.selected = true;
        expect(wrapperDeep.find('.selected').text()).toBe('Selected: existing');
    });
});

yarn test result:

RadioGroup
√ renders changed data according to the changed folder data (38ms)
× renders changed data according to the selected folder option (8ms)

Expected value to be (using ===):
"Selected: existing"
Received:
"Selected:"

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