require-v-for-key.js

/**
 * @author Toru Nagashima
 * @copyright 2017 Toru Nagashima. All rights reserved.
 * See LICENSE file in root directory for full license.
 */
'use strict'

const RuleTester = require('../../eslint-compat').RuleTester
const rule = require('../../../lib/rules/require-v-for-key')

const tester = new RuleTester({
  languageOptions: { parser: require('vue-eslint-parser'), ecmaVersion: 2015 }
})

tester.run('require-v-for-key', rule, {
  valid: [
    {
      filename: 'test.vue',
      code: ''
    },
    {
      filename: 'test.vue',
      code: '<template><div><div v-for="x in list" v-bind:key="x"></div></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><div v-for="x in list" :key="x.foo"></div></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><custom-component v-for="x in list"></custom-component></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list"><div :key="x"></div></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><slot v-for="x in list" :name="x"></slot></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><slot v-for="x in list" :name="x"><div :key="x"></div></slot></div></template>'
    },
    // key on <template> : In Vue.js 3.x, you can place key on <template>.
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list" v-bind:key="x"><div /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list" v-bind:key="x"><MyComp /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list" :key="x"><div /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list" :key="x"><MyComp /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list" :key="x.id"><div /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list" :key="x.id"><MyComp /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="(x, i) in list" :key="i"><div /></template></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="(x, i) in list" :key="i"><MyComp /></template></div></template>'
    },
    // key on <slot> : In Vue.js 3.x, you can place key on <slot>.
    {
      filename: 'test.vue',
      code: '<template><div><slot v-for="x in list" :key="x"><div /></slot></div></template>'
    },
    {
      filename: 'test.vue',
      code: '<template><div><slot v-for="x in list" :key="x"><MyComp /></slot></div></template>'
    }
  ],
  invalid: [
    {
      filename: 'test.vue',
      code: '<template><div><div v-for="x in list"></div></div></template>',
      errors: ["Elements in iteration expect to have 'v-bind:key' directives."]
    },
    {
      filename: 'test.vue',
      code: '<template><div><div v-for="x in list" key="100"></div></div></template>',
      errors: ["Elements in iteration expect to have 'v-bind:key' directives."]
    },
    {
      filename: 'test.vue',
      code: '<template><div><template v-for="x in list"><div></div></template></div></template>',
      errors: ["Elements in iteration expect to have 'v-bind:key' directives."]
    },
    {
      filename: 'test.vue',
      code: '<template><div><slot v-for="x in list" :name="x"><div></div></slot></div></template>',
      errors: ["Elements in iteration expect to have 'v-bind:key' directives."]
    }
  ]
})