forked from zhurui/management
96 lines
2.7 KiB
JavaScript
96 lines
2.7 KiB
JavaScript
/**
|
|
* @fileoverview require default case in switch statements
|
|
* @author Aliaksei Shytkin
|
|
*/
|
|
"use strict";
|
|
|
|
const DEFAULT_COMMENT_PATTERN = /^no default$/i;
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = {
|
|
meta: {
|
|
docs: {
|
|
description: "require `default` cases in `switch` statements",
|
|
category: "Best Practices",
|
|
recommended: false,
|
|
url: "https://eslint.org/docs/rules/default-case"
|
|
},
|
|
|
|
schema: [{
|
|
type: "object",
|
|
properties: {
|
|
commentPattern: {
|
|
type: "string"
|
|
}
|
|
},
|
|
additionalProperties: false
|
|
}],
|
|
|
|
messages: {
|
|
missingDefaultCase: "Expected a default case."
|
|
}
|
|
},
|
|
|
|
create(context) {
|
|
const options = context.options[0] || {};
|
|
const commentPattern = options.commentPattern
|
|
? new RegExp(options.commentPattern)
|
|
: DEFAULT_COMMENT_PATTERN;
|
|
|
|
const sourceCode = context.getSourceCode();
|
|
|
|
//--------------------------------------------------------------------------
|
|
// Helpers
|
|
//--------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Shortcut to get last element of array
|
|
* @param {*[]} collection Array
|
|
* @returns {*} Last element
|
|
*/
|
|
function last(collection) {
|
|
return collection[collection.length - 1];
|
|
}
|
|
|
|
//--------------------------------------------------------------------------
|
|
// Public
|
|
//--------------------------------------------------------------------------
|
|
|
|
return {
|
|
|
|
SwitchStatement(node) {
|
|
|
|
if (!node.cases.length) {
|
|
|
|
/*
|
|
* skip check of empty switch because there is no easy way
|
|
* to extract comments inside it now
|
|
*/
|
|
return;
|
|
}
|
|
|
|
const hasDefault = node.cases.some(v => v.test === null);
|
|
|
|
if (!hasDefault) {
|
|
|
|
let comment;
|
|
|
|
const lastCase = last(node.cases);
|
|
const comments = sourceCode.getCommentsAfter(lastCase);
|
|
|
|
if (comments.length) {
|
|
comment = last(comments);
|
|
}
|
|
|
|
if (!comment || !commentPattern.test(comment.value.trim())) {
|
|
context.report({ node, messageId: "missingDefaultCase" });
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|