eslint/tests/lib/rules/no-func-assign.js

   1 /**
   2  * @fileoverview Tests for no-func-assign.
   3  * @author Ian Christian Myers
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/no-func-assign"),
  13     { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20
  21 ruleTester.run("no-func-assign", rule, {
  22     valid: [
  23         "function foo() { var foo = bar; }",
  24         "function foo(foo) { foo = bar; }",
  25         "function foo() { var foo; foo = bar; }",
  26         { code: "var foo = () => {}; foo = bar;", parserOptions: { ecmaVersion: 6 } },
  27         "var foo = function() {}; foo = bar;",
  28         "var foo = function() { foo = bar; };",
  29         { code: "import bar from 'bar'; function foo() { var foo = bar; }", parserOptions: { ecmaVersion: 6, sourceType: "module" } }
  30     ],
  31     invalid: [
  32         {
  33             code: "function foo() {}; foo = bar;",
  34             errors: [{
  35                 messageId: "isAFunction",
  36                 data: { name: "foo" },
  37                 type: "Identifier"
  38             }]
  39         },
  40         {
  41             code: "function foo() { foo = bar; }",
  42             errors: [{
  43                 messageId: "isAFunction",
  44                 data: { name: "foo" },
  45                 type: "Identifier"
  46             }]
  47         },
  48         {
  49             code: "foo = bar; function foo() { };",
  50             errors: [{
  51                 messageId: "isAFunction",
  52                 data: { name: "foo" },
  53                 type: "Identifier"
  54             }]
  55         },
  56         {
  57             code: "[foo] = bar; function foo() { };",
  58             parserOptions: { ecmaVersion: 6 },
  59             errors: [{
  60                 messageId: "isAFunction",
  61                 data: { name: "foo" },
  62                 type: "Identifier"
  63             }]
  64         },
  65         {
  66             code: "({x: foo = 0} = bar); function foo() { };",
  67             parserOptions: { ecmaVersion: 6 },
  68             errors: [{
  69                 messageId: "isAFunction",
  70                 data: { name: "foo" },
  71                 type: "Identifier"
  72             }]
  73         },
  74         {
  75             code: "function foo() { [foo] = bar; }",
  76             parserOptions: { ecmaVersion: 6 },
  77             errors: [{
  78                 messageId: "isAFunction",
  79                 data: { name: "foo" },
  80                 type: "Identifier"
  81             }]
  82         },
  83         {
  84             code: "(function() { ({x: foo = 0} = bar); function foo() { }; })();",
  85             parserOptions: { ecmaVersion: 6 },
  86             errors: [{
  87                 messageId: "isAFunction",
  88                 data: { name: "foo" },
  89                 type: "Identifier"
  90             }]
  91         }
  92     ]
  93 });