// 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'}], } }