ESLint rule to check for round brackets in Jest `test` names. (Doesn't play nicely with --testNamePattern without escaping.)

index.js

// @ts-check

/** @type {import("eslint").Rule.RuleModule} */
const rule = {
  meta: {
    docs: {
      description: `If you use a Jest test name like "hello (world)" you can't run \`$ jest -t "hello (world)"\` to select this test.`,
    },
    fixable: 'code',
  },
  create(context) {
    return {
      CallExpression(node) {
        // 1) for every function called 'test'
        if (node.type !== 'CallExpression') return;
        if (node.callee.type !== 'Identifier') return;
        if (node.callee.name !== 'test') return;

        // 2) check if the first param is a string containing `()`
        const firstParam = node.arguments[0];
        if (!firstParam) return;
        if (firstParam.type !== 'Literal') return;
        const { value } = firstParam;
        if (typeof value !== 'string') return;
        if (!value.includes('(') && !value.includes(')')) return;

        // 3) report warning and offer a fix
        context.report({
          node: firstParam,
          message: `The usage of "(" and ")" in test names is not allowed.`,
          fix(fixer) {
            return fixer.replaceText(
              firstParam,
              `'${value.replace(/\)/g, '').replace(/\(/g, '')}'`
            );
          },
        });
      },
    };
  },
};

module.exports = rule;