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/**
* @fileoverview Require providing a second parameter to get*Pref
* methods instead of using a try/catch block.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
"use strict";
module.exports = {
meta: {
docs: {
url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/use-default-preference-values.html",
},
schema: [],
type: "suggestion",
},
create(context) {
return {
TryStatement(node) {
let types = ["Bool", "Char", "Float", "Int"];
let methods = types.map(type => "get" + type + "Pref");
if (
node.block.type != "BlockStatement" ||
node.block.body.length != 1
) {
return;
}
let firstStm = node.block.body[0];
if (
firstStm.type != "ExpressionStatement" ||
firstStm.expression.type != "AssignmentExpression" ||
firstStm.expression.right.type != "CallExpression" ||
firstStm.expression.right.callee.type != "MemberExpression" ||
firstStm.expression.right.callee.property.type != "Identifier" ||
!methods.includes(firstStm.expression.right.callee.property.name)
) {
return;
}
context.report({
node,
message: "provide a default value instead of using a try/catch block",
});
},
};
},
};
|
