eslint/tests/lib/rules/no-mixed-spaces-and-tabs.js

   1 /**
   2  * @fileoverview Disallow mixed spaces and tabs for indentation
   3  * @author Jary Niebur
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Requirements
   9 //------------------------------------------------------------------------------
  10
  11 const rule = require("../../../lib/rules/no-mixed-spaces-and-tabs"),
  12     { RuleTester } = require("../../../lib/rule-tester");
  13
  14 //------------------------------------------------------------------------------
  15 // Tests
  16 //------------------------------------------------------------------------------
  17
  18 const ruleTester = new RuleTester();
  19
  20 ruleTester.run("no-mixed-spaces-and-tabs", rule, {
  21
  22     valid: [
  23         "\tvar x = 5;",
  24         "    var x = 5;",
  25         "\t/*\n\t * Hello\n\t */",
  26         "// foo\n\t/**\n\t * Hello\n\t */",
  27         "/*\n\n \t \n*/",
  28         "/*\t */ //",
  29         "/*\n \t*/ //",
  30         "/*\n\t *//*\n \t*/",
  31         "// \t",
  32         "/*\n*/\t ",
  33         "/* \t\n\t \n \t\n\t */ \t",
  34         {
  35             code: "\tvar x = 5,\n\t    y = 2;",
  36             options: [true]
  37         },
  38         {
  39             code: "/*\n\t */`\n\t   `;",
  40             env: { es6: true }
  41         },
  42         {
  43             code: "/*\n\t */var a = `\n\t   `, b = `\n\t   `/*\t \n\t \n*/;",
  44             env: { es6: true }
  45         },
  46         {
  47             code: "/*\t `template inside comment` */",
  48             env: { es6: true }
  49         },
  50         {
  51             code: "var foo = `\t /* comment inside template\t */`;",
  52             env: { es6: true }
  53         },
  54         {
  55             code: "`\n\t   `;",
  56             env: { es6: true }
  57         },
  58         {
  59             code: "`\n\t   \n`;",
  60             env: { es6: true }
  61         },
  62         {
  63             code: "`\t   `;",
  64             env: { es6: true }
  65         },
  66         {
  67             code: "const foo = `${console}\n\t foo`;",
  68             env: { es6: true }
  69         },
  70         {
  71             code: "`\t   `;`   \t`",
  72             env: { es6: true }
  73         },
  74         {
  75             code: "`foo${ 5 }\t    `;",
  76             env: { es6: true }
  77         },
  78         "' \t\\\n\t multiline string';",
  79         "'\t \\\n \tmultiline string';",
  80         {
  81             code: "\tvar x = 5,\n\t    y = 2;",
  82             options: ["smart-tabs"]
  83         }
  84     ],
  85
  86     invalid: [
  87         {
  88             code: "function add(x, y) {\n\t return x + y;\n}",
  89             errors: [
  90                 {
  91                     messageId: "mixedSpacesAndTabs",
  92                     type: "Program",
  93                     line: 2
  94                 }
  95             ]
  96         },
  97         {
  98             code: "\t ;\n/*\n\t * Hello\n\t */",
  99             errors: [
 100                 {
 101                     messageId: "mixedSpacesAndTabs",
 102                     type: "Program",
 103                     line: 1
 104                 }
 105             ]
 106         },
 107         {
 108             code: " \t/* comment */",
 109             errors: [
 110                 {
 111                     messageId: "mixedSpacesAndTabs",
 112                     type: "Program",
 113                     line: 1
 114                 }
 115             ]
 116         },
 117         {
 118             code: "\t // comment",
 119             errors: [
 120                 {
 121                     messageId: "mixedSpacesAndTabs",
 122                     type: "Program",
 123                     line: 1
 124                 }
 125             ]
 126         },
 127         {
 128             code: "\t var a /* comment */ = 1;",
 129             errors: [
 130                 {
 131                     messageId: "mixedSpacesAndTabs",
 132                     type: "Program",
 133                     line: 1
 134                 }
 135             ]
 136         },
 137         {
 138             code: " \tvar b = 1; // comment",
 139             errors: [
 140                 {
 141                     messageId: "mixedSpacesAndTabs",
 142                     type: "Program",
 143                     line: 1
 144                 }
 145             ]
 146         },
 147         {
 148             code: "/**/\n \t/*\n \t*/",
 149             errors: [
 150                 {
 151                     messageId: "mixedSpacesAndTabs",
 152                     type: "Program",
 153                     line: 2
 154                 }
 155             ]
 156         },
 157         {
 158             code: "\t var x = 5, y = 2, z = 5;\n\n\t \tvar j =\t x + y;\nz *= j;",
 159             errors: [
 160                 {
 161                     messageId: "mixedSpacesAndTabs",
 162                     type: "Program",
 163                     line: 1
 164                 },
 165                 {
 166                     messageId: "mixedSpacesAndTabs",
 167                     type: "Program",
 168                     line: 3
 169                 }
 170             ]
 171         },
 172         {
 173             code: "\tvar x = 5,\n  \t  y = 2;",
 174             options: [true],
 175             errors: [
 176                 {
 177                     messageId: "mixedSpacesAndTabs",
 178                     type: "Program",
 179                     line: 2
 180                 }
 181             ]
 182         },
 183         {
 184             code: "\tvar x = 5,\n  \t  y = 2;",
 185             options: ["smart-tabs"],
 186             errors: [
 187                 {
 188                     messageId: "mixedSpacesAndTabs",
 189                     type: "Program",
 190                     line: 2
 191                 }
 192             ]
 193         },
 194         {
 195             code: "`foo${\n \t  5 }bar`;",
 196             options: ["smart-tabs"],
 197             env: { es6: true },
 198             errors: [
 199                 {
 200                     messageId: "mixedSpacesAndTabs",
 201                     type: "Program",
 202                     line: 2,
 203                     column: 2
 204                 }
 205             ]
 206         },
 207         {
 208             code: "`foo${\n\t  5 }bar`;",
 209             env: { es6: true },
 210             errors: [
 211                 {
 212                     messageId: "mixedSpacesAndTabs",
 213                     type: "Program",
 214                     line: 2,
 215                     column: 2
 216                 }
 217             ]
 218         },
 219         {
 220             code: "  \t'';",
 221             errors: [
 222                 {
 223                     messageId: "mixedSpacesAndTabs",
 224                     type: "Program",
 225                     line: 1
 226                 }
 227             ]
 228         },
 229         {
 230             code: "''\n\t ",
 231             errors: [
 232                 {
 233                     messageId: "mixedSpacesAndTabs",
 234                     type: "Program",
 235                     line: 2
 236                 }
 237             ]
 238         }
 239     ]
 240 });