ce4c83ff
 wxy
初始提交
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/**
* Rule: no-return-wrap function
* Prevents uneccessary wrapping of results in Promise.resolve
* or Promise.reject as the Promise will do that for us
*/
'use strict'
const getDocsUrl = require('./lib/get-docs-url')
const isPromise = require('./lib/is-promise')
const rejectMessage = 'Expected throw instead of Promise.reject'
const resolveMessage = 'Avoid wrapping return values in Promise.resolve'
function isInPromise(context) {
const expression = context.getAncestors().filter(function(node) {
return node.type === 'ExpressionStatement'
})[0]
return expression && expression.expression && isPromise(expression.expression)
}
module.exports = {
meta: {
docs: {
url: getDocsUrl('no-return-wrap')
}
},
create: function(context) {
const options = context.options[0] || {}
const allowReject = options.allowReject
return {
ReturnStatement: function(node) {
if (isInPromise(context)) {
if (node.argument) {
if (node.argument.type === 'CallExpression') {
if (node.argument.callee.type === 'MemberExpression') {
if (node.argument.callee.object.name === 'Promise') {
if (node.argument.callee.property.name === 'resolve') {
context.report({ node, message: resolveMessage })
} else if (
!allowReject &&
node.argument.callee.property.name === 'reject'
) {
context.report({ node, message: rejectMessage })
}
}
}
}
}
}
}
}
}
}
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