eslint/tests/lib/rules/no-confusing-arrow.js

   1 /**
   2  * @fileoverview Tests for no-confusing-arrow rule.
   3  * @author Jxck <https://github.com/Jxck>
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/no-confusing-arrow"),
  13     { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 6 } });
  20
  21 ruleTester.run("no-confusing-arrow", rule, {
  22     valid: [
  23         "a => { return 1 ? 2 : 3; }",
  24         { code: "a => { return 1 ? 2 : 3; }", options: [{ allowParens: false }] },
  25
  26         "var x = a => { return 1 ? 2 : 3; }",
  27         { code: "var x = a => { return 1 ? 2 : 3; }", options: [{ allowParens: false }] },
  28
  29         "var x = (a) => { return 1 ? 2 : 3; }",
  30         { code: "var x = (a) => { return 1 ? 2 : 3; }", options: [{ allowParens: false }] },
  31
  32         "var x = a => (1 ? 2 : 3)",
  33         { code: "var x = a => (1 ? 2 : 3)", options: [{ allowParens: true }] }
  34     ],
  35     invalid: [
  36         {
  37             code: "a => 1 ? 2 : 3",
  38             output: "a => (1 ? 2 : 3)",
  39             errors: [{ messageId: "confusing" }]
  40         },
  41         {
  42             code: "a => 1 ? 2 : 3",
  43             output: "a => (1 ? 2 : 3)",
  44             options: [{ allowParens: true }],
  45             errors: [{ messageId: "confusing" }]
  46         },
  47         {
  48             code: "a => 1 ? 2 : 3",
  49             output: null,
  50             options: [{ allowParens: false }],
  51             errors: [{ messageId: "confusing" }]
  52         },
  53         {
  54             code: "var x = a => 1 ? 2 : 3",
  55             output: "var x = a => (1 ? 2 : 3)",
  56             errors: [{ messageId: "confusing" }]
  57         },
  58         {
  59             code: "var x = a => 1 ? 2 : 3",
  60             output: "var x = a => (1 ? 2 : 3)",
  61             options: [{ allowParens: true }],
  62             errors: [{ messageId: "confusing" }]
  63         },
  64         {
  65             code: "var x = a => 1 ? 2 : 3",
  66             output: null,
  67             options: [{ allowParens: false }],
  68             errors: [{ messageId: "confusing" }]
  69         },
  70         {
  71             code: "var x = (a) => 1 ? 2 : 3",
  72             output: "var x = (a) => (1 ? 2 : 3)",
  73             errors: [{ messageId: "confusing" }]
  74         }
  75     ]
  76 });