[AST Eslint] No console with schema options && isPrimitive

Posted 2021-03-14 answer1215

// eslint exercise 4 (no-console)
// When you‘re finished with this exercise, run
//   "npm start exercise.eslint.5"
//   to move on to the next exercise

const disallowedMethods = [‘log‘, ‘info‘, ‘warn‘, ‘error‘, ‘dir‘]

module.exports = {
  meta: {
    schema: [
      {
        type: ‘object‘,
        properties: {
          allowedMethods: {
            type: ‘array‘,
            items: {
              enum: [‘log‘, ‘info‘, ‘warn‘, ‘error‘, ‘dir‘],
            },
            minItems: 1,
            uniqueItems: true,
          },
        },
      },
    ],
  },
  create(context) {
    const config = context.options[0] || {}
    const allowedMethods = config.allowedMethods || []
    return {
      Identifier(node) {
        if (
          !looksLike(node, {
            name: ‘console‘,
            parent: {
              type: ‘MemberExpression‘,
              parent: {type: ‘CallExpression‘},
              property: {
                name: val =>
                  !allowedMethods.includes(val) &&
                  disallowedMethods.includes(val),
              },
            },
          })
        ) {
          return
        }
        context.report({
          node: node.parent.property,
          message: ‘Using console is not allowed‘,
        })
      },
    }
  },
}

function looksLike(a, b) {
  return (
    a &&
    b &&
    Object.keys(b).every(bKey => {
      const bVal = b[bKey]
      const aVal = a[bKey]
      if (typeof bVal === ‘function‘) {
        return bVal(aVal)
      }
      return isPrimitive(bVal) ? bVal === aVal : looksLike(aVal, bVal)
    })
  )
}

function isPrimitive(val) {
  return val == null || /^[sbn]/.test(typeof val)
}

 

// eslint exercise 4 (no-console)
// When you‘re finished with this exercise, run
//   "npm start exercise.eslint.5"
//   to move on to the next exercise

const {RuleTester} = require(‘eslint‘)
const rule = require(‘./no-console‘)

const ruleTester = new RuleTester()
ruleTester.run(‘no-console‘, rule, {
  valid: [
    ‘info()‘,
    ‘console‘,
    ‘console.log‘,
    ‘console.baz()‘,
    {code: ‘console.warn()‘, options: [{allowedMethods: [‘warn‘]}]},
  ],
  invalid: [
    invalid(‘console.log()‘),
    invalid(‘console.info()‘),
    invalid(‘console.warn()‘),
  ],
})

function invalid(code) {
  return {
    code,
    errors: [{message: ‘Using console is not allowed‘}],
  }
}