eslint/tests/lib/rules/max-statements.js

   1 /**
   2  * @fileoverview Tests for max-statements rule.
   3  * @author Ian Christian Myers
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/max-statements"),
  13     { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20
  21 ruleTester.run("max-statements", rule, {
  22     valid: [
  23         { code: "function foo() { var bar = 1; function qux () { var noCount = 2; } return 3; }", options: [3] },
  24         { code: "function foo() { var bar = 1; if (true) { for (;;) { var qux = null; } } else { quxx(); } return 3; }", options: [6] },
  25         { code: "function foo() { var x = 5; function bar() { var y = 6; } bar(); z = 10; baz(); }", options: [5] },
  26         "function foo() { var a; var b; var c; var x; var y; var z; bar(); baz(); qux(); quxx(); }",
  27         { code: "(function() { var bar = 1; return function () { return 42; }; })()", options: [1, { ignoreTopLevelFunctions: true }] },
  28         { code: "function foo() { var bar = 1; var baz = 2; }", options: [1, { ignoreTopLevelFunctions: true }] },
  29         { code: "define(['foo', 'qux'], function(foo, qux) { var bar = 1; var baz = 2; })", options: [1, { ignoreTopLevelFunctions: true }] },
  30
  31         // object property options
  32         { code: "var foo = { thing: function() { var bar = 1; var baz = 2; } }", options: [2] },
  33         { code: "var foo = { thing() { var bar = 1; var baz = 2; } }", options: [2], parserOptions: { ecmaVersion: 6 } },
  34         { code: "var foo = { ['thing']() { var bar = 1; var baz = 2; } }", options: [2], parserOptions: { ecmaVersion: 6 } },
  35         { code: "var foo = { thing: () => { var bar = 1; var baz = 2; } }", options: [2], parserOptions: { ecmaVersion: 6 } },
  36         { code: "var foo = { thing: function() { var bar = 1; var baz = 2; } }", options: [{ max: 2 }] }
  37     ],
  38     invalid: [
  39         {
  40             code: "function foo() { var bar = 1; var baz = 2; var qux = 3; }",
  41             options: [2],
  42             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "3", max: 2 } }]
  43         },
  44         {
  45             code: "var foo = () => { var bar = 1; var baz = 2; var qux = 3; };",
  46             options: [2],
  47             parserOptions: { ecmaVersion: 6 },
  48             errors: [{ messageId: "exceed", data: { name: "Arrow function", count: "3", max: 2 } }]
  49         },
  50         {
  51             code: "var foo = function() { var bar = 1; var baz = 2; var qux = 3; };",
  52             options: [2],
  53             errors: [{ messageId: "exceed", data: { name: "Function", count: "3", max: 2 } }]
  54         },
  55         {
  56             code: "function foo() { var bar = 1; if (true) { while (false) { var qux = null; } } return 3; }",
  57             options: [4],
  58             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "5", max: 4 } }]
  59         },
  60         {
  61             code: "function foo() { var bar = 1; if (true) { for (;;) { var qux = null; } } return 3; }",
  62             options: [4],
  63             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "5", max: 4 } }]
  64         },
  65         {
  66             code: "function foo() { var bar = 1; if (true) { for (;;) { var qux = null; } } else { quxx(); } return 3; }",
  67             options: [5],
  68             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "6", max: 5 } }]
  69         },
  70         {
  71             code: "function foo() { var x = 5; function bar() { var y = 6; } bar(); z = 10; baz(); }",
  72             options: [3],
  73             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "5", max: 3 } }]
  74         },
  75         {
  76             code: "function foo() { var x = 5; function bar() { var y = 6; } bar(); z = 10; baz(); }",
  77             options: [4],
  78             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "5", max: 4 } }]
  79         },
  80         {
  81             code: ";(function() { var bar = 1; return function () { var z; return 42; }; })()",
  82             options: [1, { ignoreTopLevelFunctions: true }],
  83             errors: [{ messageId: "exceed", data: { name: "Function", count: "2", max: 1 } }]
  84         },
  85         {
  86             code: ";(function() { var bar = 1; var baz = 2; })(); (function() { var bar = 1; var baz = 2; })()",
  87             options: [1, { ignoreTopLevelFunctions: true }],
  88             errors: [
  89                 { messageId: "exceed", data: { name: "Function", count: "2", max: 1 } },
  90                 { messageId: "exceed", data: { name: "Function", count: "2", max: 1 } }
  91             ]
  92         },
  93         {
  94             code: "define(['foo', 'qux'], function(foo, qux) { var bar = 1; var baz = 2; return function () { var z; return 42; }; })",
  95             options: [1, { ignoreTopLevelFunctions: true }],
  96             errors: [{ messageId: "exceed", data: { name: "Function", count: "2", max: 1 } }]
  97         },
  98         {
  99             code: "function foo() { var a; var b; var c; var x; var y; var z; bar(); baz(); qux(); quxx(); foo(); }",
 100             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: "11", max: 10 } }]
 101         },
 102
 103         // object property options
 104         {
 105             code: "var foo = { thing: function() { var bar = 1; var baz = 2; var baz2; } }",
 106             options: [2],
 107             errors: [{ messageId: "exceed", data: { name: "Method 'thing'", count: "3", max: 2 } }]
 108         },
 109         {
 110             code: "var foo = { thing() { var bar = 1; var baz = 2; var baz2; } }",
 111             options: [2],
 112             parserOptions: { ecmaVersion: 6 },
 113             errors: [{ messageId: "exceed", data: { name: "Method 'thing'", count: "3", max: 2 } }]
 114         },
 115
 116         /*
 117          * TODO decide if we want this or not
 118          * {
 119          *     code: "var foo = { ['thing']() { var bar = 1; var baz = 2; var baz2; } }",
 120          *     options: [2],
 121          *     parserOptions: { ecmaVersion: 6 },
 122          *     errors: [{ messageId: "exceed", data: {name: "Method ''thing''", count: "3", max: 2} }]
 123          * },
 124          */
 125
 126         {
 127             code: "var foo = { thing: () => { var bar = 1; var baz = 2; var baz2; } }",
 128             options: [2],
 129             parserOptions: { ecmaVersion: 6 },
 130             errors: [{ messageId: "exceed", data: { name: "Arrow function 'thing'", count: "3", max: 2 } }]
 131         },
 132         {
 133             code: "var foo = { thing: function() { var bar = 1; var baz = 2; var baz2; } }",
 134             options: [{ max: 2 }],
 135             errors: [{ messageId: "exceed", data: { name: "Method 'thing'", count: "3", max: 2 } }]
 136         },
 137         {
 138             code: "function foo() { 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; }",
 139             options: [{}],
 140             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: 11, max: 10 } }]
 141         },
 142         {
 143             code: "function foo() { 1; }",
 144             options: [{ max: 0 }],
 145             errors: [{ messageId: "exceed", data: { name: "Function 'foo'", count: 1, max: 0 } }]
 146         }
 147     ]
 148 });