eslint/tests/lib/rules/no-buffer-constructor.js

   1 /**
   2  * @fileoverview disallow use of the Buffer() constructor
   3  * @author Teddy Katz
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Requirements
   9 //------------------------------------------------------------------------------
  10
  11 const rule = require("../../../lib/rules/no-buffer-constructor");
  12 const { RuleTester } = require("../../../lib/rule-tester");
  13
  14 //------------------------------------------------------------------------------
  15 // Tests
  16 //------------------------------------------------------------------------------
  17
  18 const CALL_ERROR = {
  19     messageId: "deprecated",
  20     data: {
  21         expr: "Buffer()"
  22     },
  23     type: "CallExpression"
  24 };
  25 const CONSTRUCT_ERROR = {
  26     messageId: "deprecated",
  27     data: {
  28         expr: "new Buffer()"
  29     },
  30     type: "NewExpression"
  31 };
  32
  33 const ruleTester = new RuleTester();
  34
  35 ruleTester.run("no-buffer-constructor", rule, {
  36
  37     valid: [
  38         "Buffer.alloc(5)",
  39         "Buffer.allocUnsafe(5)",
  40         "new Buffer.Foo()",
  41         "Buffer.from([1, 2, 3])",
  42         "foo(Buffer)",
  43         "Buffer.alloc(res.body.amount)",
  44         "Buffer.from(res.body.values)"
  45     ],
  46
  47     invalid: [
  48         {
  49             code: "Buffer(5)",
  50             errors: [CALL_ERROR]
  51         },
  52         {
  53             code: "new Buffer(5)",
  54             errors: [CONSTRUCT_ERROR]
  55         },
  56         {
  57             code: "Buffer([1, 2, 3])",
  58             errors: [CALL_ERROR]
  59         },
  60         {
  61             code: "new Buffer([1, 2, 3])",
  62             errors: [CONSTRUCT_ERROR]
  63         },
  64         {
  65             code: "new Buffer(res.body.amount)",
  66             errors: [CONSTRUCT_ERROR]
  67         },
  68         {
  69             code: "new Buffer(res.body.values)",
  70             errors: [CONSTRUCT_ERROR]
  71         }
  72     ]
  73 });