eslint/tests/lib/rules/no-case-declarations.js

   1 /**
   2  * @fileoverview Tests for no-case-declarations rule.
   3  * @author Erik Arvidsson
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/no-case-declarations"),
  13     { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20
  21 ruleTester.run("no-case-declarations", rule, {
  22     valid: [
  23         {
  24             code: "switch (a) { case 1: { let x = 1; break; } default: { let x = 2; break; } }",
  25             parserOptions: { ecmaVersion: 6 }
  26         },
  27         {
  28             code: "switch (a) { case 1: { const x = 1; break; } default: { const x = 2; break; } }",
  29             parserOptions: { ecmaVersion: 6 }
  30         },
  31         {
  32             code: "switch (a) { case 1: { function f() {} break; } default: { function f() {} break; } }",
  33             parserOptions: { ecmaVersion: 6 }
  34         },
  35         {
  36             code: "switch (a) { case 1: { class C {} break; } default: { class C {} break; } }",
  37             parserOptions: { ecmaVersion: 6 }
  38         }
  39     ],
  40     invalid: [
  41         {
  42             code: "switch (a) { case 1: let x = 1; break; }",
  43             parserOptions: { ecmaVersion: 6 },
  44             errors: [{ messageId: "unexpected", type: "VariableDeclaration" }]
  45         },
  46         {
  47             code: "switch (a) { default: let x = 2; break; }",
  48             parserOptions: { ecmaVersion: 6 },
  49             errors: [{ messageId: "unexpected", type: "VariableDeclaration" }]
  50         },
  51         {
  52             code: "switch (a) { case 1: const x = 1; break; }",
  53             parserOptions: { ecmaVersion: 6 },
  54             errors: [{ messageId: "unexpected", type: "VariableDeclaration" }]
  55         },
  56         {
  57             code: "switch (a) { default: const x = 2; break; }",
  58             parserOptions: { ecmaVersion: 6 },
  59             errors: [{ messageId: "unexpected", type: "VariableDeclaration" }]
  60         },
  61         {
  62             code: "switch (a) { case 1: function f() {} break; }",
  63             parserOptions: { ecmaVersion: 6 },
  64             errors: [{ messageId: "unexpected", type: "FunctionDeclaration" }]
  65         },
  66         {
  67             code: "switch (a) { default: function f() {} break; }",
  68             parserOptions: { ecmaVersion: 6 },
  69             errors: [{ messageId: "unexpected", type: "FunctionDeclaration" }]
  70         },
  71         {
  72             code: "switch (a) { case 1: class C {} break; }",
  73             parserOptions: { ecmaVersion: 6 },
  74             errors: [{ messageId: "unexpected", type: "ClassDeclaration" }]
  75         },
  76         {
  77             code: "switch (a) { default: class C {} break; }",
  78             parserOptions: { ecmaVersion: 6 },
  79             errors: [{ messageId: "unexpected", type: "ClassDeclaration" }]
  80         }
  81     ]
  82 });