eslint/tests/lib/rules/no-void.js

   1 /**
   2  * @fileoverview Rule to disallow use of void operator.
   3  * @author Mike Sidorov
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Requirements
   9 //------------------------------------------------------------------------------
  10
  11 const rule = require("../../../lib/rules/no-void");
  12 const { RuleTester } = require("../../../lib/rule-tester");
  13
  14 //------------------------------------------------------------------------------
  15 // Tests
  16 //------------------------------------------------------------------------------
  17
  18 const ruleTester = new RuleTester();
  19
  20 ruleTester.run("no-void", rule, {
  21     valid: [
  22         "var foo = bar()",
  23         "foo.void()",
  24         "foo.void = bar",
  25         "delete foo;",
  26         {
  27             code: "void 0",
  28             options: [{ allowAsStatement: true }]
  29         },
  30         {
  31             code: "void(0)",
  32             options: [{ allowAsStatement: true }]
  33         }
  34     ],
  35
  36     invalid: [
  37         {
  38             code: "void 0",
  39             errors: [{ messageId: "noVoid" }]
  40         },
  41         {
  42             code: "void 0",
  43             options: [{}],
  44             errors: [{ messageId: "noVoid" }]
  45         },
  46         {
  47             code: "void 0",
  48             options: [{ allowAsStatement: false }],
  49             errors: [{ messageId: "noVoid" }]
  50         },
  51         {
  52             code: "void(0)",
  53             errors: [{ messageId: "noVoid" }]
  54         },
  55         {
  56             code: "var foo = void 0",
  57             errors: [{ messageId: "noVoid" }]
  58         },
  59         {
  60             code: "var foo = void 0",
  61             options: [{ allowAsStatement: true }],
  62             errors: [{ messageId: "noVoid" }]
  63         }
  64     ]
  65 });