eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
44 lines • 1.71 kB
JavaScript
;
/*
* eslint-plugin-sonarjs
* Copyright (C) 2018 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
// https://jira.sonarsource.com/browse/RSPEC-1301
const MESSAGE = '"switch" statements should have at least 3 "case" clauses';
const rule = {
meta: {
type: "suggestion",
},
create(context) {
return {
SwitchStatement(node) {
const switchStatement = node;
const { cases } = switchStatement;
const hasDefault = cases.some(x => !x.test);
if (cases.length < 2 || (cases.length === 2 && hasDefault)) {
const firstToken = context.getSourceCode().getFirstToken(node);
if (firstToken) {
context.report({ message: MESSAGE, loc: firstToken.loc });
}
}
},
};
},
};
module.exports = rule;
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