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80 righe
2.6 KiB
80 righe
2.6 KiB
'use strict';
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/* eslint "complexity": [ "error", 5 ] */
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/**
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* @fileoverview Disallow async functions as arguments to describe
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*/
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const createAstUtils = require('../util/ast');
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module.exports = {
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meta: {
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type: 'problem',
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docs: {
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description: 'Disallow async functions passed to describe'
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},
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fixable: 'code'
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},
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create(context) {
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const astUtils = createAstUtils(context.settings);
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const sourceCode = context.getSourceCode();
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function isFunction(node) {
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return (
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node.type === 'FunctionExpression' ||
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node.type === 'FunctionDeclaration' ||
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node.type === 'ArrowFunctionExpression'
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);
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}
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function containsDirectAwait(node) {
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if (node.type === 'AwaitExpression') {
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return true;
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} else if (node.type && !isFunction(node)) {
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return Object.keys(node).some(function (key) {
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if (Array.isArray(node[key])) {
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return node[key].some(containsDirectAwait);
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} else if (key !== 'parent' && node[key] && typeof node[key] === 'object') {
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return containsDirectAwait(node[key]);
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}
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return false;
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});
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}
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return false;
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}
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function fixAsyncFunction(fixer, fn) {
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if (!containsDirectAwait(fn.body)) {
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// Remove the "async" token and all the whitespace before "function":
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const [ asyncToken, functionToken ] = sourceCode.getFirstTokens(fn, 2);
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return fixer.removeRange([ asyncToken.range[0], functionToken.range[0] ]);
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}
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return undefined;
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}
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function isAsyncFunction(node) {
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return node && (node.type === 'FunctionExpression' ||
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node.type === 'ArrowFunctionExpression') && node.async;
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}
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return {
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CallExpression(node) {
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const name = astUtils.getNodeName(node.callee);
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if (astUtils.isDescribe(node)) {
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const fnArg = node.arguments.slice(-1)[0];
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if (isAsyncFunction(fnArg)) {
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context.report({
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node: fnArg,
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message: `Unexpected async function in ${name}()`,
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fix(fixer) {
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return fixAsyncFunction(fixer, fnArg);
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}
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});
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}
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}
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}
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};
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}
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};
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