eslint/tests/lib/rules/multiline-ternary.js

   1 /**
   2  * @fileoverview Enforce newlines between operands of ternary expressions
   3  * @author Kai Cataldo
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/multiline-ternary");
  13 const { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20
  21 ruleTester.run("multiline-ternary", rule, {
  22     valid: [
  23
  24         // default "always"
  25         "a\n? b\n: c",
  26         "a ?\nb :\nc",
  27         "a\n? b\n? c\n: d\n: e",
  28         "a\n? (b\n? c\n: d)\n: e",
  29
  30         // "always"
  31         { code: "a\n? b\n: c", options: ["always"] },
  32         { code: "a ?\nb :\nc", options: ["always"] },
  33         { code: "a\n? b\n? c\n: d\n: e", options: ["always"] },
  34         { code: "a\n? (b\n? c\n: d)\n: e", options: ["always"] },
  35
  36         // "always-multiline"
  37         { code: "a\n? b\n: c", options: ["always-multiline"] },
  38         { code: "a ?\nb :\nc", options: ["always-multiline"] },
  39         { code: "a\n? b\n? c\n: d\n: e", options: ["always-multiline"] },
  40         { code: "a\n? (b\n? c\n: d)\n: e", options: ["always-multiline"] },
  41         { code: "a ? b : c", options: ["always-multiline"] },
  42         { code: "a ? b ? c : d : e", options: ["always-multiline"] },
  43         { code: "a ? (b ? c : d) : e", options: ["always-multiline"] },
  44         { code: "a\n? (b ? c : d)\n: e", options: ["always-multiline"] },
  45         { code: "a ?\n(b ? c : d) :\ne", options: ["always-multiline"] },
  46
  47         // "never"
  48         { code: "a ? b : c", options: ["never"] },
  49         { code: "a ? b ? c : d : e", options: ["never"] },
  50         { code: "a ? (b ? c : d) : e", options: ["never"] }
  51     ],
  52
  53     invalid: [
  54
  55         // default "always"
  56         {
  57             code: "a ? b : c",
  58             errors: [{
  59                 messageId: "expectedTestCons",
  60                 line: 1,
  61                 column: 1
  62             },
  63             {
  64                 messageId: "expectedConsAlt",
  65                 line: 1,
  66                 column: 5
  67             }]
  68         },
  69         {
  70             code: "a\n? b : c",
  71             errors: [{
  72                 messageId: "expectedConsAlt",
  73                 line: 2,
  74                 column: 3
  75             }]
  76         },
  77         {
  78             code: "a ? b\n: c",
  79             errors: [{
  80                 messageId: "expectedTestCons",
  81                 line: 1,
  82                 column: 1
  83             }]
  84         },
  85         {
  86             code: "a ? (b ? c : d) : e",
  87             errors: [{
  88                 messageId: "expectedTestCons",
  89                 line: 1,
  90                 column: 1
  91             },
  92             {
  93                 messageId: "expectedConsAlt",
  94                 line: 1,
  95                 column: 6
  96             },
  97             {
  98                 messageId: "expectedTestCons",
  99                 line: 1,
 100                 column: 6
 101             },
 102             {
 103                 messageId: "expectedConsAlt",
 104                 line: 1,
 105                 column: 10
 106             }]
 107         },
 108         {
 109             code: "a ?\n(b ? c : d) :\ne",
 110             errors: [{
 111                 messageId: "expectedTestCons",
 112                 line: 2,
 113                 column: 2
 114             },
 115             {
 116                 messageId: "expectedConsAlt",
 117                 line: 2,
 118                 column: 6
 119             }]
 120         },
 121         {
 122             code: "a ? (b\n? c\n: d) : e",
 123             errors: [{
 124                 messageId: "expectedTestCons",
 125                 line: 1,
 126                 column: 1
 127             },
 128             {
 129                 messageId: "expectedConsAlt",
 130                 line: 1,
 131                 column: 6
 132             }]
 133         },
 134         {
 135             code: "a ?\n(b? c\n: d) : e",
 136             errors: [{
 137                 messageId: "expectedConsAlt",
 138                 line: 2,
 139                 column: 2
 140             },
 141             {
 142                 messageId: "expectedTestCons",
 143                 line: 2,
 144                 column: 2
 145             }]
 146         },
 147         {
 148             code: "a ?\n(b\n? c : d) : e",
 149             errors: [{
 150                 messageId: "expectedConsAlt",
 151                 line: 2,
 152                 column: 2
 153             },
 154             {
 155                 messageId: "expectedConsAlt",
 156                 line: 3,
 157                 column: 3
 158             }]
 159         },
 160         {
 161             code: "a ?\n(b\n? c\n : d) : e",
 162             errors: [{
 163                 messageId: "expectedConsAlt",
 164                 line: 2,
 165                 column: 2
 166             }]
 167         },
 168
 169         // "always"
 170         {
 171             code: "a ? b : c",
 172             options: ["always"],
 173             errors: [{
 174                 messageId: "expectedTestCons",
 175                 line: 1,
 176                 column: 1
 177             },
 178             {
 179                 messageId: "expectedConsAlt",
 180                 line: 1,
 181                 column: 5
 182             }]
 183         },
 184         {
 185             code: "a\n? b : c",
 186             options: ["always"],
 187             errors: [{
 188                 messageId: "expectedConsAlt",
 189                 line: 2,
 190                 column: 3
 191             }]
 192         },
 193         {
 194             code: "a ? b\n: c",
 195             options: ["always"],
 196             errors: [{
 197                 messageId: "expectedTestCons",
 198                 line: 1,
 199                 column: 1
 200             }]
 201         },
 202         {
 203             code: "a ? (b ? c : d) : e",
 204             options: ["always"],
 205             errors: [{
 206                 messageId: "expectedTestCons",
 207                 line: 1,
 208                 column: 1
 209             },
 210             {
 211                 messageId: "expectedConsAlt",
 212                 line: 1,
 213                 column: 6
 214             },
 215             {
 216                 messageId: "expectedTestCons",
 217                 line: 1,
 218                 column: 6
 219             },
 220             {
 221                 messageId: "expectedConsAlt",
 222                 line: 1,
 223                 column: 10
 224             }]
 225         },
 226         {
 227             code: "a ?\n(b ? c : d) :\ne",
 228             options: ["always"],
 229             errors: [{
 230                 messageId: "expectedTestCons",
 231                 line: 2,
 232                 column: 2
 233             },
 234             {
 235                 messageId: "expectedConsAlt",
 236                 line: 2,
 237                 column: 6
 238             }]
 239         },
 240         {
 241             code: "a ? (b\n? c\n: d) : e",
 242             options: ["always"],
 243             errors: [{
 244                 messageId: "expectedTestCons",
 245                 line: 1,
 246                 column: 1
 247             },
 248             {
 249                 messageId: "expectedConsAlt",
 250                 line: 1,
 251                 column: 6
 252             }]
 253         },
 254         {
 255             code: "a ?\n(b? c\n: d) : e",
 256             options: ["always"],
 257             errors: [{
 258                 messageId: "expectedConsAlt",
 259                 line: 2,
 260                 column: 2
 261             },
 262             {
 263                 messageId: "expectedTestCons",
 264                 line: 2,
 265                 column: 2
 266             }]
 267         },
 268         {
 269             code: "a ?\n(b\n? c : d) : e",
 270             options: ["always"],
 271             errors: [{
 272                 messageId: "expectedConsAlt",
 273                 line: 2,
 274                 column: 2
 275             },
 276             {
 277                 messageId: "expectedConsAlt",
 278                 line: 3,
 279                 column: 3
 280             }]
 281         },
 282         {
 283             code: "a ?\n(b\n? c\n : d) : e",
 284             options: ["always"],
 285             errors: [{
 286                 messageId: "expectedConsAlt",
 287                 line: 2,
 288                 column: 2
 289             }]
 290         },
 291
 292         // "always-multiline"
 293         {
 294             code: "a\n? b : c",
 295             options: ["always-multiline"],
 296             errors: [{
 297                 messageId: "expectedConsAlt",
 298                 line: 2,
 299                 column: 3
 300             }]
 301         },
 302         {
 303             code: "a ? b\n: c",
 304             options: ["always-multiline"],
 305             errors: [{
 306                 messageId: "expectedTestCons",
 307                 line: 1,
 308                 column: 1
 309             }]
 310         },
 311         {
 312             code: "a &&\nb ? c : d",
 313             options: ["always-multiline"],
 314             errors: [{
 315                 messageId: "expectedTestCons",
 316                 line: 1,
 317                 column: 1
 318             },
 319             {
 320                 messageId: "expectedConsAlt",
 321                 line: 2,
 322                 column: 5
 323             }]
 324         },
 325         {
 326             code: "a ? b +\nc : d",
 327             options: ["always-multiline"],
 328             errors: [{
 329                 messageId: "expectedTestCons",
 330                 line: 1,
 331                 column: 1
 332             },
 333             {
 334                 messageId: "expectedConsAlt",
 335                 line: 1,
 336                 column: 5
 337             }]
 338         },
 339         {
 340             code: "a ? b : c +\nd",
 341             options: ["always-multiline"],
 342             errors: [{
 343                 messageId: "expectedTestCons",
 344                 line: 1,
 345                 column: 1
 346             },
 347             {
 348                 messageId: "expectedConsAlt",
 349                 line: 1,
 350                 column: 5
 351             }]
 352         },
 353         {
 354             code: "a ?\n(b ? c : d) : e",
 355             options: ["always-multiline"],
 356             errors: [{
 357                 messageId: "expectedConsAlt",
 358                 line: 2,
 359                 column: 2
 360             }]
 361         },
 362         {
 363             code: "a ? (b ? c : d) :\ne",
 364             options: ["always-multiline"],
 365             errors: [{
 366                 messageId: "expectedTestCons",
 367                 line: 1,
 368                 column: 1
 369             }]
 370         },
 371         {
 372             code: "a ? (b\n? c\n: d) : e",
 373             options: ["always-multiline"],
 374             errors: [{
 375                 messageId: "expectedTestCons",
 376                 line: 1,
 377                 column: 1
 378             },
 379             {
 380                 messageId: "expectedConsAlt",
 381                 line: 1,
 382                 column: 6
 383             }]
 384         },
 385         {
 386             code: "a ?\n(b ? c\n: d) : e",
 387             options: ["always-multiline"],
 388             errors: [{
 389                 messageId: "expectedConsAlt",
 390                 line: 2,
 391                 column: 2
 392             },
 393             {
 394                 messageId: "expectedTestCons",
 395                 line: 2,
 396                 column: 2
 397             }]
 398         },
 399         {
 400             code: "a ?\n(b\n? c : d) : e",
 401             options: ["always-multiline"],
 402             errors: [{
 403                 messageId: "expectedConsAlt",
 404                 line: 2,
 405                 column: 2
 406             },
 407             {
 408                 messageId: "expectedConsAlt",
 409                 line: 3,
 410                 column: 3
 411             }]
 412         },
 413         {
 414             code: "a ?\n(b\n? c\n : d) : e",
 415             options: ["always-multiline"],
 416             errors: [{
 417                 messageId: "expectedConsAlt",
 418                 line: 2,
 419                 column: 2
 420             }]
 421         },
 422
 423         // "never"
 424         {
 425             code: "a\n? b : c",
 426             options: ["never"],
 427             errors: [{
 428                 messageId: "unexpectedTestCons",
 429                 line: 1,
 430                 column: 1
 431             }]
 432         },
 433         {
 434             code: "a ? b\n: c",
 435             options: ["never"],
 436             errors: [{
 437                 messageId: "unexpectedConsAlt",
 438                 line: 1,
 439                 column: 5
 440             }]
 441         },
 442         {
 443             code: "a ?\n(b ? c : d) :\ne",
 444             options: ["never"],
 445             errors: [{
 446                 messageId: "unexpectedTestCons",
 447                 line: 1,
 448                 column: 1
 449             },
 450             {
 451                 messageId: "unexpectedConsAlt",
 452                 line: 2,
 453                 column: 2
 454             }]
 455         },
 456         {
 457             code: "a ? (b\n? c\n: d) : e",
 458             options: ["never"],
 459             errors: [{
 460                 messageId: "unexpectedTestCons",
 461                 line: 1,
 462                 column: 6
 463             },
 464             {
 465                 messageId: "unexpectedConsAlt",
 466                 line: 2,
 467                 column: 3
 468             }]
 469         },
 470         {
 471             code: "a ?\n(b? c\n: d) : e",
 472             options: ["never"],
 473             errors: [{
 474                 messageId: "unexpectedTestCons",
 475                 line: 1,
 476                 column: 1
 477             },
 478             {
 479                 messageId: "unexpectedConsAlt",
 480                 line: 2,
 481                 column: 5
 482             }]
 483         },
 484         {
 485             code: "a ?\n(b\n? c : d) : e",
 486             options: ["never"],
 487             errors: [{
 488                 messageId: "unexpectedTestCons",
 489                 line: 1,
 490                 column: 1
 491             },
 492             {
 493                 messageId: "unexpectedTestCons",
 494                 line: 2,
 495                 column: 2
 496             }]
 497         },
 498         {
 499             code: "a ?\n(b\n? c\n : d) : e",
 500             options: ["never"],
 501             errors: [{
 502                 messageId: "unexpectedTestCons",
 503                 line: 1,
 504                 column: 1
 505             },
 506             {
 507                 messageId: "unexpectedTestCons",
 508                 line: 2,
 509                 column: 2
 510             },
 511             {
 512                 messageId: "unexpectedConsAlt",
 513                 line: 3,
 514                 column: 3
 515             }]
 516         },
 517         {
 518             code: "a ? (b\n? c\n: d)\n: e",
 519             options: ["never"],
 520             errors: [{
 521                 messageId: "unexpectedConsAlt",
 522                 line: 1,
 523                 column: 6
 524             },
 525             {
 526                 messageId: "unexpectedTestCons",
 527                 line: 1,
 528                 column: 6
 529             },
 530             {
 531                 messageId: "unexpectedConsAlt",
 532                 line: 2,
 533                 column: 3
 534             }]
 535         },
 536         {
 537             code: "a\n?\n(b\n?\nc\n:\nd)\n:\ne",
 538             options: ["never"],
 539             errors: [{
 540                 messageId: "unexpectedTestCons",
 541                 line: 1,
 542                 column: 1
 543             },
 544             {
 545                 messageId: "unexpectedConsAlt",
 546                 line: 3,
 547                 column: 2
 548             },
 549             {
 550                 messageId: "unexpectedTestCons",
 551                 line: 3,
 552                 column: 2
 553             },
 554             {
 555                 messageId: "unexpectedConsAlt",
 556                 line: 5,
 557                 column: 1
 558             }]
 559         }
 560     ]
 561 });