eslint/tests/lib/rules/for-direction.js

   1 /**
   2  * @fileoverview Tests for for-direction rule.
   3  * @author Aladdin-ADD <hh_2013@foxmail.com>
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/for-direction");
  13 const { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Helpers
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20 const incorrectDirection = { messageId: "incorrectDirection" };
  21
  22 ruleTester.run("for-direction", rule, {
  23     valid: [
  24
  25         // test if '++', '--'
  26         "for(var i = 0; i < 10; i++){}",
  27         "for(var i = 0; i <= 10; i++){}",
  28         "for(var i = 10; i > 0; i--){}",
  29         "for(var i = 10; i >= 0; i--){}",
  30
  31         // test if '+=', '-=',
  32         "for(var i = 0; i < 10; i+=1){}",
  33         "for(var i = 0; i <= 10; i+=1){}",
  34         "for(var i = 0; i < 10; i-=-1){}",
  35         "for(var i = 0; i <= 10; i-=-1){}",
  36         "for(var i = 10; i > 0; i-=1){}",
  37         "for(var i = 10; i >= 0; i-=1){}",
  38         "for(var i = 10; i > 0; i+=-1){}",
  39         "for(var i = 10; i >= 0; i+=-1){}",
  40
  41         // test if no update.
  42         "for(var i = 10; i > 0;){}",
  43         "for(var i = 10; i >= 0;){}",
  44         "for(var i = 10; i < 0;){}",
  45         "for(var i = 10; i <= 0;){}",
  46         "for(var i = 10; i <= 0; j++){}",
  47         "for(var i = 10; i <= 0; j--){}",
  48         "for(var i = 10; i >= 0; j++){}",
  49         "for(var i = 10; i >= 0; j--){}",
  50         "for(var i = 10; i >= 0; j += 2){}",
  51         "for(var i = 10; i >= 0; j -= 2){}",
  52         "for(var i = 10; i >= 0; i |= 2){}",
  53         "for(var i = 10; i >= 0; i %= 2){}",
  54         "for(var i = 0; i < MAX; i += STEP_SIZE);",
  55         "for(var i = 0; i < MAX; i -= STEP_SIZE);",
  56         "for(var i = 10; i > 0; i += STEP_SIZE);",
  57
  58         // other cond-expressions.
  59         "for(var i = 0; i !== 10; i+=1){}",
  60         "for(var i = 0; i === 10; i+=1){}",
  61         "for(var i = 0; i == 10; i+=1){}",
  62         "for(var i = 0; i != 10; i+=1){}"
  63     ],
  64     invalid: [
  65
  66         // test if '++', '--'
  67         { code: "for(var i = 0; i < 10; i--){}", errors: [incorrectDirection] },
  68         { code: "for(var i = 0; i <= 10; i--){}", errors: [incorrectDirection] },
  69         { code: "for(var i = 10; i > 10; i++){}", errors: [incorrectDirection] },
  70         { code: "for(var i = 10; i >= 0; i++){}", errors: [incorrectDirection] },
  71
  72         // test if '+=', '-='
  73         { code: "for(var i = 0; i < 10; i-=1){}", errors: [incorrectDirection] },
  74         { code: "for(var i = 0; i <= 10; i-=1){}", errors: [incorrectDirection] },
  75         { code: "for(var i = 10; i > 10; i+=1){}", errors: [incorrectDirection] },
  76         { code: "for(var i = 10; i >= 0; i+=1){}", errors: [incorrectDirection] },
  77         { code: "for(var i = 0; i < 10; i+=-1){}", errors: [incorrectDirection] },
  78         { code: "for(var i = 0; i <= 10; i+=-1){}", errors: [incorrectDirection] },
  79         { code: "for(var i = 10; i > 10; i-=-1){}", errors: [incorrectDirection] },
  80         { code: "for(var i = 10; i >= 0; i-=-1){}", errors: [incorrectDirection] }
  81     ]
  82 });