no-dupe-keys.js

/**
 * @fileoverview Tests for no-dupe-keys rule.
 * @author Ian Christian Myers
 */

"use strict";

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

const rule = require("../../../lib/rules/no-dupe-keys"),
    { RuleTester } = require("../../../lib/rule-tester");

//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------

const ruleTester = new RuleTester();

ruleTester.run("no-dupe-keys", rule, {
    valid: [
        "var foo = { __proto__: 1, two: 2};",
        "var x = { foo: 1, bar: 2 };",
        "var x = { '': 1, bar: 2 };",
        "var x = { '': 1, ' ': 2 };",
        { code: "var x = { '': 1, [null]: 2 };", parserOptions: { ecmaVersion: 6 } },
        { code: "var x = { '': 1, [a]: 2 };", parserOptions: { ecmaVersion: 6 } },
        { code: "var x = { [a]: 1, [a]: 2 };", parserOptions: { ecmaVersion: 6 } },
        "+{ get a() { }, set a(b) { } };",
        { code: "var x = { a: b, [a]: b };", parserOptions: { ecmaVersion: 6 } },
        { code: "var x = { a: b, ...c }", parserOptions: { ecmaVersion: 2018 } },
        { code: "var x = { get a() {}, set a (value) {} };", parserOptions: { ecmaVersion: 6 } },
        { code: "var x = { a: 1, b: { a: 2 } };", parserOptions: { ecmaVersion: 6 } },
        { code: "var {a, a} = obj", parserOptions: { ecmaVersion: 6 } }
    ],
    invalid: [
        { code: "var x = { a: b, ['a']: b };", parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpected", data: { name: "a" }, type: "ObjectExpression" }] },
        { code: "var x = { y: 1, y: 2 };", errors: [{ messageId: "unexpected", data: { name: "y" }, type: "ObjectExpression" }] },
        { code: "var x = { '': 1, '': 2 };", errors: [{ messageId: "unexpected", data: { name: "" }, type: "ObjectExpression" }] },
        { code: "var x = { '': 1, [``]: 2 };", parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpected", data: { name: "" }, type: "ObjectExpression" }] },
        { code: "var foo = { 0x1: 1, 1: 2};", errors: [{ messageId: "unexpected", data: { name: "1" }, type: "ObjectExpression" }] },
        { code: "var x = { \"z\": 1, z: 2 };", errors: [{ messageId: "unexpected", data: { name: "z" }, type: "ObjectExpression" }] },
        { code: "var foo = {\n  bar: 1,\n  bar: 1,\n}", errors: [{ messageId: "unexpected", data: { name: "bar" }, line: 3, column: 3 }] },
        { code: "var x = { a: 1, get a() {} };", parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpected", data: { name: "a" }, type: "ObjectExpression" }] },
        { code: "var x = { a: 1, set a(value) {} };", parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpected", data: { name: "a" }, type: "ObjectExpression" }] },
        { code: "var x = { a: 1, b: { a: 2 }, get b() {} };", parserOptions: { ecmaVersion: 6 }, errors: [{ messageId: "unexpected", data: { name: "b" }, type: "ObjectExpression" }] }
    ]
});