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'use strict';
const common = require('../common');
common.skipIfEslintMissing();
const RuleTester = require('../../tools/node_modules/eslint').RuleTester;
const rule = require('../../tools/eslint-rules/no-let-in-for-declaration');
const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
const message = 'Use of `let` as the loop variable in a for-loop is ' +
'not recommended. Please use `var` instead.';
ruleTester.run('no-let-in-for-declaration', rule, {
valid: [
'let foo;',
'for (var foo = 1;;);',
'for (foo = 1;;);',
'for (;;);',
'for (const foo of bar);',
'for (var foo of bar);',
'for (const foo in bar);',
'for (var foo in bar);'
],
invalid: [
{
code: 'for (let foo = 1;;);',
output: 'for (var foo = 1;;);',
errors: [{ message }]
},
{
code: 'for (let foo in bar);',
output: 'for (var foo in bar);',
errors: [{ message }]
},
{
code: 'for (let foo of bar);',
output: 'for (var foo of bar);',
errors: [{ message }]
}
]
});
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