1 //===- unittest/Format/FormatTestJS.cpp - Formatting unit tests for JS ----===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "FormatTestUtils.h" 11 #include "clang/Format/Format.h" 12 #include "llvm/Support/Debug.h" 13 #include "gtest/gtest.h" 14 15 #define DEBUG_TYPE "format-test" 16 17 namespace clang { 18 namespace format { 19 20 class FormatTestJS : public ::testing::Test { 21 protected: 22 static std::string format(llvm::StringRef Code, unsigned Offset, 23 unsigned Length, const FormatStyle &Style) { 24 DEBUG(llvm::errs() << "---\n"); 25 DEBUG(llvm::errs() << Code << "\n\n"); 26 std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length)); 27 bool IncompleteFormat = false; 28 tooling::Replacements Replaces = 29 reformat(Style, Code, Ranges, "<stdin>", &IncompleteFormat); 30 EXPECT_FALSE(IncompleteFormat); 31 auto Result = applyAllReplacements(Code, Replaces); 32 EXPECT_TRUE(static_cast<bool>(Result)); 33 DEBUG(llvm::errs() << "\n" << *Result << "\n\n"); 34 return *Result; 35 } 36 37 static std::string format( 38 llvm::StringRef Code, 39 const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript)) { 40 return format(Code, 0, Code.size(), Style); 41 } 42 43 static FormatStyle getGoogleJSStyleWithColumns(unsigned ColumnLimit) { 44 FormatStyle Style = getGoogleStyle(FormatStyle::LK_JavaScript); 45 Style.ColumnLimit = ColumnLimit; 46 return Style; 47 } 48 49 static void verifyFormat( 50 llvm::StringRef Code, 51 const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript)) { 52 std::string Result = format(test::messUp(Code), Style); 53 EXPECT_EQ(Code.str(), Result) << "Formatted:\n" << Result; 54 } 55 56 static void verifyFormat( 57 llvm::StringRef Expected, 58 llvm::StringRef Code, 59 const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript)) { 60 std::string Result = format(Code, Style); 61 EXPECT_EQ(Expected.str(), Result) << "Formatted:\n" << Result; 62 } 63 }; 64 65 TEST_F(FormatTestJS, BlockComments) { 66 verifyFormat("/* aaaaaaaaaaaaa */ aaaaaaaaaaaaaaaaaaaaaaaaaaa(\n" 67 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);"); 68 } 69 70 TEST_F(FormatTestJS, UnderstandsJavaScriptOperators) { 71 verifyFormat("a == = b;"); 72 verifyFormat("a != = b;"); 73 74 verifyFormat("a === b;"); 75 verifyFormat("aaaaaaa ===\n b;", getGoogleJSStyleWithColumns(10)); 76 verifyFormat("a !== b;"); 77 verifyFormat("aaaaaaa !==\n b;", getGoogleJSStyleWithColumns(10)); 78 verifyFormat("if (a + b + c +\n" 79 " d !==\n" 80 " e + f + g)\n" 81 " q();", 82 getGoogleJSStyleWithColumns(20)); 83 84 verifyFormat("a >> >= b;"); 85 86 verifyFormat("a >>> b;"); 87 verifyFormat("aaaaaaa >>>\n b;", getGoogleJSStyleWithColumns(10)); 88 verifyFormat("a >>>= b;"); 89 verifyFormat("aaaaaaa >>>=\n b;", getGoogleJSStyleWithColumns(10)); 90 verifyFormat("if (a + b + c +\n" 91 " d >>>\n" 92 " e + f + g)\n" 93 " q();", 94 getGoogleJSStyleWithColumns(20)); 95 verifyFormat("var x = aaaaaaaaaa ?\n" 96 " bbbbbb :\n" 97 " ccc;", 98 getGoogleJSStyleWithColumns(20)); 99 100 verifyFormat("var b = a.map((x) => x + 1);"); 101 verifyFormat("return ('aaa') in bbbb;"); 102 verifyFormat("var x = aaaaaaaaaaaaaaaaaaaaaaaaa() in\n" 103 " aaaa.aaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;"); 104 FormatStyle Style = getGoogleJSStyleWithColumns(80); 105 Style.AlignOperands = true; 106 verifyFormat("var x = aaaaaaaaaaaaaaaaaaaaaaaaa() in\n" 107 " aaaa.aaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;", 108 Style); 109 Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All; 110 verifyFormat("var x = aaaaaaaaaaaaaaaaaaaaaaaaa()\n" 111 " in aaaa.aaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;", 112 Style); 113 114 // ES6 spread operator. 115 verifyFormat("someFunction(...a);"); 116 verifyFormat("var x = [1, ...a, 2];"); 117 } 118 119 TEST_F(FormatTestJS, UnderstandsAmpAmp) { 120 verifyFormat("e && e.SomeFunction();"); 121 } 122 123 TEST_F(FormatTestJS, LiteralOperatorsCanBeKeywords) { 124 verifyFormat("not.and.or.not_eq = 1;"); 125 } 126 127 TEST_F(FormatTestJS, ReservedWords) { 128 // JavaScript reserved words (aka keywords) are only illegal when used as 129 // Identifiers, but are legal as IdentifierNames. 130 verifyFormat("x.class.struct = 1;"); 131 verifyFormat("x.case = 1;"); 132 verifyFormat("x.interface = 1;"); 133 verifyFormat("x.for = 1;"); 134 verifyFormat("x.of() = 1;"); 135 verifyFormat("x.in() = 1;"); 136 verifyFormat("x.let() = 1;"); 137 verifyFormat("x.var() = 1;"); 138 verifyFormat("x = {\n" 139 " a: 12,\n" 140 " interface: 1,\n" 141 " switch: 1,\n" 142 "};"); 143 verifyFormat("var struct = 2;"); 144 verifyFormat("var union = 2;"); 145 verifyFormat("var interface = 2;"); 146 verifyFormat("interface = 2;"); 147 verifyFormat("x = interface instanceof y;"); 148 } 149 150 TEST_F(FormatTestJS, CppKeywords) { 151 // Make sure we don't mess stuff up because of C++ keywords. 152 verifyFormat("return operator && (aa);"); 153 } 154 155 TEST_F(FormatTestJS, ES6DestructuringAssignment) { 156 verifyFormat("var [a, b, c] = [1, 2, 3];"); 157 verifyFormat("const [a, b, c] = [1, 2, 3];"); 158 verifyFormat("let [a, b, c] = [1, 2, 3];"); 159 verifyFormat("var {a, b} = {a: 1, b: 2};"); 160 verifyFormat("let {a, b} = {a: 1, b: 2};"); 161 } 162 163 TEST_F(FormatTestJS, ContainerLiterals) { 164 verifyFormat("var x = {\n" 165 " y: function(a) {\n" 166 " return a;\n" 167 " }\n" 168 "};"); 169 verifyFormat("return {\n" 170 " link: function() {\n" 171 " f(); //\n" 172 " }\n" 173 "};"); 174 verifyFormat("return {\n" 175 " a: a,\n" 176 " link: function() {\n" 177 " f(); //\n" 178 " }\n" 179 "};"); 180 verifyFormat("return {\n" 181 " a: a,\n" 182 " link: function() {\n" 183 " f(); //\n" 184 " },\n" 185 " link: function() {\n" 186 " f(); //\n" 187 " }\n" 188 "};"); 189 verifyFormat("var stuff = {\n" 190 " // comment for update\n" 191 " update: false,\n" 192 " // comment for modules\n" 193 " modules: false,\n" 194 " // comment for tasks\n" 195 " tasks: false\n" 196 "};"); 197 verifyFormat("return {\n" 198 " 'finish':\n" 199 " //\n" 200 " a\n" 201 "};"); 202 verifyFormat("var obj = {\n" 203 " fooooooooo: function(x) {\n" 204 " return x.zIsTooLongForOneLineWithTheDeclarationLine();\n" 205 " }\n" 206 "};"); 207 // Simple object literal, as opposed to enum style below. 208 verifyFormat("var obj = {a: 123};"); 209 // Enum style top level assignment. 210 verifyFormat("X = {\n a: 123\n};"); 211 verifyFormat("X.Y = {\n a: 123\n};"); 212 // But only on the top level, otherwise its a plain object literal assignment. 213 verifyFormat("function x() {\n" 214 " y = {z: 1};\n" 215 "}"); 216 verifyFormat("x = foo && {a: 123};"); 217 218 // Arrow functions in object literals. 219 verifyFormat("var x = {\n" 220 " y: (a) => {\n" 221 " return a;\n" 222 " }\n" 223 "};"); 224 verifyFormat("var x = {y: (a) => a};"); 225 226 // Computed keys. 227 verifyFormat("var x = {[a]: 1, b: 2, [c]: 3};"); 228 verifyFormat("var x = {\n" 229 " [a]: 1,\n" 230 " b: 2,\n" 231 " [c]: 3,\n" 232 "};"); 233 234 // Object literals can leave out labels. 235 verifyFormat("f({a}, () => {\n" 236 " g(); //\n" 237 "});"); 238 239 // Keys can be quoted. 240 verifyFormat("var x = {\n" 241 " a: a,\n" 242 " b: b,\n" 243 " 'c': c,\n" 244 "};"); 245 } 246 247 TEST_F(FormatTestJS, MethodsInObjectLiterals) { 248 verifyFormat("var o = {\n" 249 " value: 'test',\n" 250 " get value() { // getter\n" 251 " return this.value;\n" 252 " }\n" 253 "};"); 254 verifyFormat("var o = {\n" 255 " value: 'test',\n" 256 " set value(val) { // setter\n" 257 " this.value = val;\n" 258 " }\n" 259 "};"); 260 verifyFormat("var o = {\n" 261 " value: 'test',\n" 262 " someMethod(val) { // method\n" 263 " doSomething(this.value + val);\n" 264 " }\n" 265 "};"); 266 verifyFormat("var o = {\n" 267 " someMethod(val) { // method\n" 268 " doSomething(this.value + val);\n" 269 " },\n" 270 " someOtherMethod(val) { // method\n" 271 " doSomething(this.value + val);\n" 272 " }\n" 273 "};"); 274 } 275 276 TEST_F(FormatTestJS, SpacesInContainerLiterals) { 277 verifyFormat("var arr = [1, 2, 3];"); 278 verifyFormat("f({a: 1, b: 2, c: 3});"); 279 280 verifyFormat("var object_literal_with_long_name = {\n" 281 " a: 'aaaaaaaaaaaaaaaaaa',\n" 282 " b: 'bbbbbbbbbbbbbbbbbb'\n" 283 "};"); 284 285 verifyFormat("f({a: 1, b: 2, c: 3});", 286 getChromiumStyle(FormatStyle::LK_JavaScript)); 287 verifyFormat("f({'a': [{}]});"); 288 } 289 290 TEST_F(FormatTestJS, SingleQuotedStrings) { 291 verifyFormat("this.function('', true);"); 292 } 293 294 TEST_F(FormatTestJS, GoogScopes) { 295 verifyFormat("goog.scope(function() {\n" 296 "var x = a.b;\n" 297 "var y = c.d;\n" 298 "}); // goog.scope"); 299 verifyFormat("goog.scope(function() {\n" 300 "// test\n" 301 "var x = 0;\n" 302 "// test\n" 303 "});"); 304 } 305 306 TEST_F(FormatTestJS, GoogModules) { 307 verifyFormat("goog.module('this.is.really.absurdly.long');", 308 getGoogleJSStyleWithColumns(40)); 309 verifyFormat("goog.require('this.is.really.absurdly.long');", 310 getGoogleJSStyleWithColumns(40)); 311 verifyFormat("goog.provide('this.is.really.absurdly.long');", 312 getGoogleJSStyleWithColumns(40)); 313 verifyFormat("var long = goog.require('this.is.really.absurdly.long');", 314 getGoogleJSStyleWithColumns(40)); 315 verifyFormat("goog.setTestOnly('this.is.really.absurdly.long');", 316 getGoogleJSStyleWithColumns(40)); 317 verifyFormat("goog.forwardDeclare('this.is.really.absurdly.long');", 318 getGoogleJSStyleWithColumns(40)); 319 320 // These should be wrapped normally. 321 verifyFormat( 322 "var MyLongClassName =\n" 323 " goog.module.get('my.long.module.name.followedBy.MyLongClassName');"); 324 } 325 326 TEST_F(FormatTestJS, FormatsNamespaces) { 327 verifyFormat("namespace Foo {\n" 328 " export let x = 1;\n" 329 "}\n"); 330 verifyFormat("declare namespace Foo {\n" 331 " export let x: number;\n" 332 "}\n"); 333 } 334 335 TEST_F(FormatTestJS, FormatsFreestandingFunctions) { 336 verifyFormat("function outer1(a, b) {\n" 337 " function inner1(a, b) {\n" 338 " return a;\n" 339 " }\n" 340 " inner1(a, b);\n" 341 "}\n" 342 "function outer2(a, b) {\n" 343 " function inner2(a, b) {\n" 344 " return a;\n" 345 " }\n" 346 " inner2(a, b);\n" 347 "}"); 348 verifyFormat("function f() {}"); 349 } 350 351 TEST_F(FormatTestJS, GeneratorFunctions) { 352 verifyFormat("function* f() {\n" 353 " let x = 1;\n" 354 " yield x;\n" 355 " yield* something();\n" 356 "}"); 357 verifyFormat("function*\n" 358 " f() {\n" 359 "}", 360 getGoogleJSStyleWithColumns(8)); 361 verifyFormat("export function* f() {\n" 362 " yield 1;\n" 363 "}\n"); 364 verifyFormat("class X {\n" 365 " * generatorMethod() {\n" 366 " yield x;\n" 367 " }\n" 368 "}"); 369 } 370 371 TEST_F(FormatTestJS, AsyncFunctions) { 372 verifyFormat("async function f() {\n" 373 " let x = 1;\n" 374 " return fetch(x);\n" 375 "}"); 376 verifyFormat("async function* f() {\n" 377 " yield fetch(x);\n" 378 "}"); 379 verifyFormat("export async function f() {\n" 380 " return fetch(x);\n" 381 "}"); 382 verifyFormat("class X {\n" 383 " async asyncMethod() {\n" 384 " return fetch(1);\n" 385 " }\n" 386 "}"); 387 verifyFormat("function initialize() {\n" 388 " // Comment.\n" 389 " return async.then();\n" 390 "}\n"); 391 } 392 393 TEST_F(FormatTestJS, ArrayLiterals) { 394 verifyFormat("var aaaaa: List<SomeThing> =\n" 395 " [new SomeThingAAAAAAAAAAAA(), new SomeThingBBBBBBBBB()];"); 396 verifyFormat("return [\n" 397 " aaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbbb,\n" 398 " ccccccccccccccccccccccccccc\n" 399 "];"); 400 verifyFormat("return [\n" 401 " aaaa().bbbbbbbb('A'),\n" 402 " aaaa().bbbbbbbb('B'),\n" 403 " aaaa().bbbbbbbb('C'),\n" 404 "];"); 405 verifyFormat("var someVariable = SomeFunction([\n" 406 " aaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbbb,\n" 407 " ccccccccccccccccccccccccccc\n" 408 "]);"); 409 verifyFormat("var someVariable = SomeFunction([\n" 410 " [aaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbb],\n" 411 "]);", 412 getGoogleJSStyleWithColumns(51)); 413 verifyFormat("var someVariable = SomeFunction(aaaa, [\n" 414 " aaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbbb,\n" 415 " ccccccccccccccccccccccccccc\n" 416 "]);"); 417 verifyFormat("var someVariable = SomeFunction(\n" 418 " aaaa,\n" 419 " [\n" 420 " aaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbbbbbb,\n" 421 " cccccccccccccccccccccccccc\n" 422 " ],\n" 423 " aaaa);"); 424 verifyFormat("var aaaa = aaaaa || // wrap\n" 425 " [];"); 426 427 verifyFormat("someFunction([], {a: a});"); 428 } 429 430 TEST_F(FormatTestJS, ColumnLayoutForArrayLiterals) { 431 verifyFormat("var array = [\n" 432 " a, a, a, a, a, a, a, a, a, a, a, a, a, a, a,\n" 433 " a, a, a, a, a, a, a, a, a, a, a, a, a, a, a,\n" 434 "];"); 435 verifyFormat("var array = someFunction([\n" 436 " a, a, a, a, a, a, a, a, a, a, a, a, a, a, a,\n" 437 " a, a, a, a, a, a, a, a, a, a, a, a, a, a, a,\n" 438 "]);"); 439 } 440 441 TEST_F(FormatTestJS, FunctionLiterals) { 442 FormatStyle Style = getGoogleStyle(FormatStyle::LK_JavaScript); 443 Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline; 444 verifyFormat("doFoo(function() {});"); 445 verifyFormat("doFoo(function() { return 1; });", Style); 446 verifyFormat("var func = function() {\n" 447 " return 1;\n" 448 "};"); 449 verifyFormat("var func = //\n" 450 " function() {\n" 451 " return 1;\n" 452 "};"); 453 verifyFormat("return {\n" 454 " body: {\n" 455 " setAttribute: function(key, val) { this[key] = val; },\n" 456 " getAttribute: function(key) { return this[key]; },\n" 457 " style: {direction: ''}\n" 458 " }\n" 459 "};", 460 Style); 461 verifyFormat("abc = xyz ? function() {\n" 462 " return 1;\n" 463 "} : function() {\n" 464 " return -1;\n" 465 "};"); 466 467 verifyFormat("var closure = goog.bind(\n" 468 " function() { // comment\n" 469 " foo();\n" 470 " bar();\n" 471 " },\n" 472 " this, arg1IsReallyLongAndNeeedsLineBreaks,\n" 473 " arg3IsReallyLongAndNeeedsLineBreaks);"); 474 verifyFormat("var closure = goog.bind(function() { // comment\n" 475 " foo();\n" 476 " bar();\n" 477 "}, this);"); 478 verifyFormat("return {\n" 479 " a: 'E',\n" 480 " b: function() {\n" 481 " return function() {\n" 482 " f(); //\n" 483 " };\n" 484 " }\n" 485 "};"); 486 verifyFormat("{\n" 487 " var someVariable = function(x) {\n" 488 " return x.zIsTooLongForOneLineWithTheDeclarationLine();\n" 489 " };\n" 490 "}"); 491 verifyFormat("someLooooooooongFunction(\n" 492 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n" 493 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n" 494 " function(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n" 495 " // code\n" 496 " });"); 497 498 verifyFormat("return {\n" 499 " a: function SomeFunction() {\n" 500 " // ...\n" 501 " return 1;\n" 502 " }\n" 503 "};"); 504 verifyFormat("this.someObject.doSomething(aaaaaaaaaaaaaaaaaaaaaaaaaa)\n" 505 " .then(goog.bind(function(aaaaaaaaaaa) {\n" 506 " someFunction();\n" 507 " someFunction();\n" 508 " }, this), aaaaaaaaaaaaaaaaa);"); 509 510 verifyFormat("someFunction(goog.bind(function() {\n" 511 " doSomething();\n" 512 " doSomething();\n" 513 "}, this), goog.bind(function() {\n" 514 " doSomething();\n" 515 " doSomething();\n" 516 "}, this));"); 517 518 // FIXME: This is bad, we should be wrapping before "function() {". 519 verifyFormat("someFunction(function() {\n" 520 " doSomething(); // break\n" 521 "})\n" 522 " .doSomethingElse(\n" 523 " // break\n" 524 " );"); 525 526 Style.ColumnLimit = 33; 527 verifyFormat("f({a: function() { return 1; }});", Style); 528 Style.ColumnLimit = 32; 529 verifyFormat("f({\n" 530 " a: function() { return 1; }\n" 531 "});", 532 Style); 533 534 } 535 536 TEST_F(FormatTestJS, InliningFunctionLiterals) { 537 FormatStyle Style = getGoogleStyle(FormatStyle::LK_JavaScript); 538 Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline; 539 verifyFormat("var func = function() {\n" 540 " return 1;\n" 541 "};", 542 Style); 543 verifyFormat("var func = doSomething(function() { return 1; });", Style); 544 verifyFormat("var outer = function() {\n" 545 " var inner = function() { return 1; }\n" 546 "};", 547 Style); 548 verifyFormat("function outer1(a, b) {\n" 549 " function inner1(a, b) { return a; }\n" 550 "}", 551 Style); 552 553 Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All; 554 verifyFormat("var func = function() { return 1; };", Style); 555 verifyFormat("var func = doSomething(function() { return 1; });", Style); 556 verifyFormat( 557 "var outer = function() { var inner = function() { return 1; } };", 558 Style); 559 verifyFormat("function outer1(a, b) {\n" 560 " function inner1(a, b) { return a; }\n" 561 "}", 562 Style); 563 564 Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None; 565 verifyFormat("var func = function() {\n" 566 " return 1;\n" 567 "};", 568 Style); 569 verifyFormat("var func = doSomething(function() {\n" 570 " return 1;\n" 571 "});", 572 Style); 573 verifyFormat("var outer = function() {\n" 574 " var inner = function() {\n" 575 " return 1;\n" 576 " }\n" 577 "};", 578 Style); 579 verifyFormat("function outer1(a, b) {\n" 580 " function inner1(a, b) {\n" 581 " return a;\n" 582 " }\n" 583 "}", 584 Style); 585 586 Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty; 587 verifyFormat("var func = function() {\n" 588 " return 1;\n" 589 "};", 590 Style); 591 } 592 593 TEST_F(FormatTestJS, MultipleFunctionLiterals) { 594 FormatStyle Style = getGoogleStyle(FormatStyle::LK_JavaScript); 595 Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All; 596 verifyFormat("promise.then(\n" 597 " function success() {\n" 598 " doFoo();\n" 599 " doBar();\n" 600 " },\n" 601 " function error() {\n" 602 " doFoo();\n" 603 " doBaz();\n" 604 " },\n" 605 " []);\n"); 606 verifyFormat("promise.then(\n" 607 " function success() {\n" 608 " doFoo();\n" 609 " doBar();\n" 610 " },\n" 611 " [],\n" 612 " function error() {\n" 613 " doFoo();\n" 614 " doBaz();\n" 615 " });\n"); 616 verifyFormat("promise.then(\n" 617 " [],\n" 618 " function success() {\n" 619 " doFoo();\n" 620 " doBar();\n" 621 " },\n" 622 " function error() {\n" 623 " doFoo();\n" 624 " doBaz();\n" 625 " });\n"); 626 627 verifyFormat("getSomeLongPromise()\n" 628 " .then(function(value) { body(); })\n" 629 " .thenCatch(function(error) {\n" 630 " body();\n" 631 " body();\n" 632 " });", 633 Style); 634 verifyFormat("getSomeLongPromise()\n" 635 " .then(function(value) {\n" 636 " body();\n" 637 " body();\n" 638 " })\n" 639 " .thenCatch(function(error) {\n" 640 " body();\n" 641 " body();\n" 642 " });"); 643 644 verifyFormat("getSomeLongPromise()\n" 645 " .then(function(value) { body(); })\n" 646 " .thenCatch(function(error) { body(); });", 647 Style); 648 649 verifyFormat("return [aaaaaaaaaaaaaaaaaaaaaa]\n" 650 " .aaaaaaa(function() {\n" 651 " //\n" 652 " })\n" 653 " .bbbbbb();"); 654 } 655 656 TEST_F(FormatTestJS, ArrowFunctions) { 657 verifyFormat("var x = (a) => {\n" 658 " return a;\n" 659 "};"); 660 verifyFormat("var x = (a) => {\n" 661 " function y() {\n" 662 " return 42;\n" 663 " }\n" 664 " return a;\n" 665 "};"); 666 verifyFormat("var x = (a: type): {some: type} => {\n" 667 " return a;\n" 668 "};"); 669 verifyFormat("var x = (a) => a;"); 670 verifyFormat("return () => [];"); 671 verifyFormat("var aaaaaaaaaaaaaaaaaaaa = {\n" 672 " aaaaaaaaaaaaaaaaaaaaaaaaaaaa:\n" 673 " (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n" 674 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) =>\n" 675 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n" 676 "};"); 677 verifyFormat("var a = a.aaaaaaa(\n" 678 " (a: a) => aaaaaaaaaaaaaaaaaaaaaaaaa(bbbbbbbbb) &&\n" 679 " aaaaaaaaaaaaaaaaaaaaaaaaa(bbbbbbb));"); 680 verifyFormat("var a = a.aaaaaaa(\n" 681 " (a: a) => aaaaaaaaaaaaaaaaaaaaa(bbbbbbbbb) ?\n" 682 " aaaaaaaaaaaaaaaaaaaaa(bbbbbbb) :\n" 683 " aaaaaaaaaaaaaaaaaaaaa(bbbbbbb));"); 684 685 // FIXME: This is bad, we should be wrapping before "() => {". 686 verifyFormat("someFunction(() => {\n" 687 " doSomething(); // break\n" 688 "})\n" 689 " .doSomethingElse(\n" 690 " // break\n" 691 " );"); 692 } 693 694 TEST_F(FormatTestJS, ReturnStatements) { 695 verifyFormat("function() {\n" 696 " return [hello, world];\n" 697 "}"); 698 } 699 700 TEST_F(FormatTestJS, ForLoops) { 701 verifyFormat("for (var i in [2, 3]) {\n" 702 "}"); 703 verifyFormat("for (var i of [2, 3]) {\n" 704 "}"); 705 verifyFormat("for (let {a, b} of x) {\n" 706 "}"); 707 verifyFormat("for (let {a, b} in x) {\n" 708 "}"); 709 } 710 711 TEST_F(FormatTestJS, WrapRespectsAutomaticSemicolonInsertion) { 712 // The following statements must not wrap, as otherwise the program meaning 713 // would change due to automatic semicolon insertion. 714 // See http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.1. 715 verifyFormat("return aaaaa;", getGoogleJSStyleWithColumns(10)); 716 verifyFormat("return /* hello! */ aaaaa;", getGoogleJSStyleWithColumns(10)); 717 verifyFormat("continue aaaaa;", getGoogleJSStyleWithColumns(10)); 718 verifyFormat("continue /* hello! */ aaaaa;", getGoogleJSStyleWithColumns(10)); 719 verifyFormat("break aaaaa;", getGoogleJSStyleWithColumns(10)); 720 verifyFormat("throw aaaaa;", getGoogleJSStyleWithColumns(10)); 721 verifyFormat("aaaaaaaaa++;", getGoogleJSStyleWithColumns(10)); 722 verifyFormat("aaaaaaaaa--;", getGoogleJSStyleWithColumns(10)); 723 verifyFormat("return [\n" 724 " aaa\n" 725 "];", 726 getGoogleJSStyleWithColumns(12)); 727 } 728 729 TEST_F(FormatTestJS, AutomaticSemicolonInsertionHeuristic) { 730 verifyFormat("a\n" 731 "b;", 732 " a \n" 733 " b ;"); 734 verifyFormat("a()\n" 735 "b;", 736 " a ()\n" 737 " b ;"); 738 verifyFormat("a[b]\n" 739 "c;", 740 "a [b]\n" 741 "c ;"); 742 verifyFormat("1\n" 743 "a;", 744 "1 \n" 745 "a ;"); 746 verifyFormat("a\n" 747 "1;", 748 "a \n" 749 "1 ;"); 750 verifyFormat("a\n" 751 "'x';", 752 "a \n" 753 " 'x';"); 754 verifyFormat("a++\n" 755 "b;", 756 "a ++\n" 757 "b ;"); 758 verifyFormat("a\n" 759 "!b && c;", 760 "a \n" 761 " ! b && c;"); 762 verifyFormat("a\n" 763 "if (1) f();", 764 " a\n" 765 " if (1) f();"); 766 verifyFormat("a\n" 767 "class X {}", 768 " a\n" 769 " class X {}"); 770 verifyFormat("var a", "var\n" 771 "a"); 772 verifyFormat("x instanceof String", "x\n" 773 "instanceof\n" 774 "String"); 775 verifyFormat("function f(@Foo bar) {}", "function f(@Foo\n" 776 " bar) {}"); 777 } 778 779 TEST_F(FormatTestJS, ClosureStyleCasts) { 780 verifyFormat("var x = /** @type {foo} */ (bar);"); 781 } 782 783 TEST_F(FormatTestJS, TryCatch) { 784 verifyFormat("try {\n" 785 " f();\n" 786 "} catch (e) {\n" 787 " g();\n" 788 "} finally {\n" 789 " h();\n" 790 "}"); 791 792 // But, of course, "catch" is a perfectly fine function name in JavaScript. 793 verifyFormat("someObject.catch();"); 794 verifyFormat("someObject.new();"); 795 verifyFormat("someObject.delete();"); 796 } 797 798 TEST_F(FormatTestJS, StringLiteralConcatenation) { 799 verifyFormat("var literal = 'hello ' +\n" 800 " 'world';"); 801 } 802 803 TEST_F(FormatTestJS, RegexLiteralClassification) { 804 // Regex literals. 805 verifyFormat("var regex = /abc/;"); 806 verifyFormat("f(/abc/);"); 807 verifyFormat("f(abc, /abc/);"); 808 verifyFormat("some_map[/abc/];"); 809 verifyFormat("var x = a ? /abc/ : /abc/;"); 810 verifyFormat("for (var i = 0; /abc/.test(s[i]); i++) {\n}"); 811 verifyFormat("var x = !/abc/.test(y);"); 812 verifyFormat("var x = a && /abc/.test(y);"); 813 verifyFormat("var x = a || /abc/.test(y);"); 814 verifyFormat("var x = a + /abc/.search(y);"); 815 verifyFormat("/abc/.search(y);"); 816 verifyFormat("var regexs = {/abc/, /abc/};"); 817 verifyFormat("return /abc/;"); 818 819 // Not regex literals. 820 verifyFormat("var a = a / 2 + b / 3;"); 821 verifyFormat("var a = a++ / 2;"); 822 // Prefix unary can operate on regex literals, not that it makes sense. 823 verifyFormat("var a = ++/a/;"); 824 825 // This is a known issue, regular expressions are incorrectly detected if 826 // directly following a closing parenthesis. 827 verifyFormat("if (foo) / bar /.exec(baz);"); 828 } 829 830 TEST_F(FormatTestJS, RegexLiteralSpecialCharacters) { 831 verifyFormat("var regex = /=/;"); 832 verifyFormat("var regex = /a*/;"); 833 verifyFormat("var regex = /a+/;"); 834 verifyFormat("var regex = /a?/;"); 835 verifyFormat("var regex = /.a./;"); 836 verifyFormat("var regex = /a\\*/;"); 837 verifyFormat("var regex = /^a$/;"); 838 verifyFormat("var regex = /\\/a/;"); 839 verifyFormat("var regex = /(?:x)/;"); 840 verifyFormat("var regex = /x(?=y)/;"); 841 verifyFormat("var regex = /x(?!y)/;"); 842 verifyFormat("var regex = /x|y/;"); 843 verifyFormat("var regex = /a{2}/;"); 844 verifyFormat("var regex = /a{1,3}/;"); 845 846 verifyFormat("var regex = /[abc]/;"); 847 verifyFormat("var regex = /[^abc]/;"); 848 verifyFormat("var regex = /[\\b]/;"); 849 verifyFormat("var regex = /[/]/;"); 850 verifyFormat("var regex = /[\\/]/;"); 851 verifyFormat("var regex = /\\[/;"); 852 verifyFormat("var regex = /\\\\[/]/;"); 853 verifyFormat("var regex = /}[\"]/;"); 854 verifyFormat("var regex = /}[/\"]/;"); 855 verifyFormat("var regex = /}[\"/]/;"); 856 857 verifyFormat("var regex = /\\b/;"); 858 verifyFormat("var regex = /\\B/;"); 859 verifyFormat("var regex = /\\d/;"); 860 verifyFormat("var regex = /\\D/;"); 861 verifyFormat("var regex = /\\f/;"); 862 verifyFormat("var regex = /\\n/;"); 863 verifyFormat("var regex = /\\r/;"); 864 verifyFormat("var regex = /\\s/;"); 865 verifyFormat("var regex = /\\S/;"); 866 verifyFormat("var regex = /\\t/;"); 867 verifyFormat("var regex = /\\v/;"); 868 verifyFormat("var regex = /\\w/;"); 869 verifyFormat("var regex = /\\W/;"); 870 verifyFormat("var regex = /a(a)\\1/;"); 871 verifyFormat("var regex = /\\0/;"); 872 verifyFormat("var regex = /\\\\/g;"); 873 verifyFormat("var regex = /\\a\\\\/g;"); 874 verifyFormat("var regex = /\a\\//g;"); 875 verifyFormat("var regex = /a\\//;\n" 876 "var x = 0;"); 877 verifyFormat("var regex = /'/g;", "var regex = /'/g ;"); 878 verifyFormat("var regex = /'/g; //'", "var regex = /'/g ; //'"); 879 verifyFormat("var regex = /\\/*/;\n" 880 "var x = 0;", 881 "var regex = /\\/*/;\n" 882 "var x=0;"); 883 verifyFormat("var x = /a\\//;", "var x = /a\\// \n;"); 884 verifyFormat("var regex = /\"/;", getGoogleJSStyleWithColumns(16)); 885 verifyFormat("var regex =\n" 886 " /\"/;", 887 getGoogleJSStyleWithColumns(15)); 888 verifyFormat("var regex = //\n" 889 " /a/;"); 890 verifyFormat("var regexs = [\n" 891 " /d/, //\n" 892 " /aa/, //\n" 893 "];"); 894 } 895 896 TEST_F(FormatTestJS, RegexLiteralModifiers) { 897 verifyFormat("var regex = /abc/g;"); 898 verifyFormat("var regex = /abc/i;"); 899 verifyFormat("var regex = /abc/m;"); 900 verifyFormat("var regex = /abc/y;"); 901 } 902 903 TEST_F(FormatTestJS, RegexLiteralLength) { 904 verifyFormat("var regex = /aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/;", 905 getGoogleJSStyleWithColumns(60)); 906 verifyFormat("var regex =\n" 907 " /aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/;", 908 getGoogleJSStyleWithColumns(60)); 909 verifyFormat("var regex = /\\xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/;", 910 getGoogleJSStyleWithColumns(50)); 911 } 912 913 TEST_F(FormatTestJS, RegexLiteralExamples) { 914 verifyFormat("var regex = search.match(/(?:\?|&)times=([^?&]+)/i);"); 915 } 916 917 TEST_F(FormatTestJS, TypeAnnotations) { 918 verifyFormat("var x: string;"); 919 verifyFormat("var x: {a: string; b: number;} = {};"); 920 verifyFormat("function x(): string {\n return 'x';\n}"); 921 verifyFormat("function x(): {x: string} {\n return {x: 'x'};\n}"); 922 verifyFormat("function x(y: string): string {\n return 'x';\n}"); 923 verifyFormat("for (var y: string in x) {\n x();\n}"); 924 verifyFormat("for (var y: string of x) {\n x();\n}"); 925 verifyFormat("function x(y: {a?: number;} = {}): number {\n" 926 " return 12;\n" 927 "}"); 928 verifyFormat("((a: string, b: number): string => a + b);"); 929 verifyFormat("var x: (y: number) => string;"); 930 verifyFormat("var x: P<string, (a: number) => string>;"); 931 verifyFormat("var x = {\n" 932 " y: function(): z {\n" 933 " return 1;\n" 934 " }\n" 935 "};"); 936 verifyFormat("var x = {\n" 937 " y: function(): {a: number} {\n" 938 " return 1;\n" 939 " }\n" 940 "};"); 941 verifyFormat("function someFunc(args: string[]):\n" 942 " {longReturnValue: string[]} {}", 943 getGoogleJSStyleWithColumns(60)); 944 } 945 946 TEST_F(FormatTestJS, UnionIntersectionTypes) { 947 verifyFormat("let x: A|B = A | B;"); 948 verifyFormat("let x: A&B|C = A & B;"); 949 verifyFormat("let x: Foo<A|B> = new Foo<A|B>();"); 950 verifyFormat("function(x: A|B): C&D {}"); 951 verifyFormat("function(x: A|B = A | B): C&D {}"); 952 verifyFormat("function x(path: number|string) {}"); 953 verifyFormat("function x(): string|number {}"); 954 verifyFormat("type Foo = Bar|Baz;"); 955 verifyFormat("type Foo = Bar<X>|Baz;"); 956 verifyFormat("type Foo = (Bar<X>|Baz);"); 957 verifyFormat("let x: Bar|Baz;"); 958 verifyFormat("let x: Bar<X>|Baz;"); 959 verifyFormat("let x: (Foo|Bar)[];"); 960 } 961 962 TEST_F(FormatTestJS, ClassDeclarations) { 963 verifyFormat("class C {\n x: string = 12;\n}"); 964 verifyFormat("class C {\n x(): string => 12;\n}"); 965 verifyFormat("class C {\n ['x' + 2]: string = 12;\n}"); 966 verifyFormat("class C {\n private x: string = 12;\n}"); 967 verifyFormat("class C {\n private static x: string = 12;\n}"); 968 verifyFormat("class C {\n static x(): string {\n return 'asd';\n }\n}"); 969 verifyFormat("class C extends P implements I {}"); 970 verifyFormat("class C extends p.P implements i.I {}"); 971 verifyFormat("class Test {\n" 972 " aaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaa: aaaaaaaaaaaaaaaaaaaa):\n" 973 " aaaaaaaaaaaaaaaaaaaaaa {}\n" 974 "}"); 975 verifyFormat("foo = class Name {\n" 976 " constructor() {}\n" 977 "};"); 978 verifyFormat("foo = class {\n" 979 " constructor() {}\n" 980 "};"); 981 verifyFormat("class C {\n" 982 " x: {y: Z;} = {};\n" 983 " private y: {y: Z;} = {};\n" 984 "}"); 985 986 // ':' is not a type declaration here. 987 verifyFormat("class X {\n" 988 " subs = {\n" 989 " 'b': {\n" 990 " 'c': 1,\n" 991 " },\n" 992 " };\n" 993 "}"); 994 verifyFormat("@Component({\n" 995 " moduleId: module.id,\n" 996 "})\n" 997 "class SessionListComponent implements OnDestroy, OnInit {\n" 998 "}"); 999 } 1000 1001 TEST_F(FormatTestJS, InterfaceDeclarations) { 1002 verifyFormat("interface I {\n" 1003 " x: string;\n" 1004 " enum: string[];\n" 1005 " enum?: string[];\n" 1006 "}\n" 1007 "var y;"); 1008 // Ensure that state is reset after parsing the interface. 1009 verifyFormat("interface a {}\n" 1010 "export function b() {}\n" 1011 "var x;"); 1012 1013 // Arrays of object type literals. 1014 verifyFormat("interface I {\n" 1015 " o: {}[];\n" 1016 "}"); 1017 } 1018 1019 TEST_F(FormatTestJS, EnumDeclarations) { 1020 verifyFormat("enum Foo {\n" 1021 " A = 1,\n" 1022 " B\n" 1023 "}"); 1024 verifyFormat("export /* somecomment*/ enum Foo {\n" 1025 " A = 1,\n" 1026 " B\n" 1027 "}"); 1028 verifyFormat("enum Foo {\n" 1029 " A = 1, // comment\n" 1030 " B\n" 1031 "}\n" 1032 "var x = 1;"); 1033 } 1034 1035 TEST_F(FormatTestJS, MetadataAnnotations) { 1036 verifyFormat("@A\nclass C {\n}"); 1037 verifyFormat("@A({arg: 'value'})\nclass C {\n}"); 1038 verifyFormat("@A\n@B\nclass C {\n}"); 1039 verifyFormat("class C {\n @A x: string;\n}"); 1040 verifyFormat("class C {\n" 1041 " @A\n" 1042 " private x(): string {\n" 1043 " return 'y';\n" 1044 " }\n" 1045 "}"); 1046 verifyFormat("class C {\n" 1047 " private x(@A x: string) {}\n" 1048 "}"); 1049 verifyFormat("class X {}\n" 1050 "class Y {}"); 1051 } 1052 1053 TEST_F(FormatTestJS, TypeAliases) { 1054 verifyFormat("type X = number;\n" 1055 "class C {}"); 1056 verifyFormat("type X<Y> = Z<Y>;"); 1057 verifyFormat("type X = {\n" 1058 " y: number\n" 1059 "};\n" 1060 "class C {}"); 1061 } 1062 1063 TEST_F(FormatTestJS, Modules) { 1064 verifyFormat("import SomeThing from 'some/module.js';"); 1065 verifyFormat("import {X, Y} from 'some/module.js';"); 1066 verifyFormat("import a, {X, Y} from 'some/module.js';"); 1067 verifyFormat("import {X, Y,} from 'some/module.js';"); 1068 verifyFormat("import {X as myLocalX, Y as myLocalY} from 'some/module.js';"); 1069 // Ensure Automatic Semicolon Insertion does not break on "as\n". 1070 verifyFormat("import {X as myX} from 'm';", "import {X as\n" 1071 " myX} from 'm';"); 1072 verifyFormat("import * as lib from 'some/module.js';"); 1073 verifyFormat("var x = {import: 1};\nx.import = 2;"); 1074 1075 verifyFormat("export function fn() {\n" 1076 " return 'fn';\n" 1077 "}"); 1078 verifyFormat("export function A() {}\n" 1079 "export default function B() {}\n" 1080 "export function C() {}"); 1081 verifyFormat("export default () => {\n" 1082 " let x = 1;\n" 1083 " return x;\n" 1084 "}"); 1085 verifyFormat("export const x = 12;"); 1086 verifyFormat("export default class X {}"); 1087 verifyFormat("export {X, Y} from 'some/module.js';"); 1088 verifyFormat("export {X, Y,} from 'some/module.js';"); 1089 verifyFormat("export {SomeVeryLongExport as X, " 1090 "SomeOtherVeryLongExport as Y} from 'some/module.js';"); 1091 // export without 'from' is wrapped. 1092 verifyFormat("export let someRatherLongVariableName =\n" 1093 " someSurprisinglyLongVariable + someOtherRatherLongVar;"); 1094 // ... but not if from is just an identifier. 1095 verifyFormat("export {\n" 1096 " from as from,\n" 1097 " someSurprisinglyLongVariable as\n" 1098 " from\n" 1099 "};", 1100 getGoogleJSStyleWithColumns(20)); 1101 verifyFormat("export class C {\n" 1102 " x: number;\n" 1103 " y: string;\n" 1104 "}"); 1105 verifyFormat("export class X { y: number; }"); 1106 verifyFormat("export abstract class X { y: number; }"); 1107 verifyFormat("export default class X { y: number }"); 1108 verifyFormat("export default function() {\n return 1;\n}"); 1109 verifyFormat("export var x = 12;"); 1110 verifyFormat("class C {}\n" 1111 "export function f() {}\n" 1112 "var v;"); 1113 verifyFormat("export var x: number = 12;"); 1114 verifyFormat("export const y = {\n" 1115 " a: 1,\n" 1116 " b: 2\n" 1117 "};"); 1118 verifyFormat("export enum Foo {\n" 1119 " BAR,\n" 1120 " // adsdasd\n" 1121 " BAZ\n" 1122 "}"); 1123 verifyFormat("export default [\n" 1124 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n" 1125 " bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n" 1126 "];"); 1127 verifyFormat("export default [];"); 1128 verifyFormat("export default () => {};"); 1129 verifyFormat("export interface Foo { foo: number; }\n" 1130 "export class Bar {\n" 1131 " blah(): string {\n" 1132 " return this.blah;\n" 1133 " };\n" 1134 "}"); 1135 } 1136 1137 TEST_F(FormatTestJS, ImportWrapping) { 1138 verifyFormat("import {VeryLongImportsAreAnnoying, VeryLongImportsAreAnnoying," 1139 " VeryLongImportsAreAnnoying, VeryLongImportsAreAnnoying" 1140 "} from 'some/module.js';"); 1141 FormatStyle Style = getGoogleJSStyleWithColumns(80); 1142 Style.JavaScriptWrapImports = true; 1143 verifyFormat("import {\n" 1144 " VeryLongImportsAreAnnoying,\n" 1145 " VeryLongImportsAreAnnoying,\n" 1146 " VeryLongImportsAreAnnoying,\n" 1147 "} from 'some/module.js';", 1148 Style); 1149 verifyFormat("import {\n" 1150 " A,\n" 1151 " A,\n" 1152 "} from 'some/module.js';", 1153 Style); 1154 verifyFormat("export {\n" 1155 " A,\n" 1156 " A,\n" 1157 "} from 'some/module.js';", 1158 Style); 1159 } 1160 1161 TEST_F(FormatTestJS, TemplateStrings) { 1162 // Keeps any whitespace/indentation within the template string. 1163 verifyFormat("var x = `hello\n" 1164 " ${name}\n" 1165 " !`;", 1166 "var x = `hello\n" 1167 " ${ name }\n" 1168 " !`;"); 1169 1170 verifyFormat("var x =\n" 1171 " `hello ${world}` >= some();", 1172 getGoogleJSStyleWithColumns(34)); // Barely doesn't fit. 1173 verifyFormat("var x = `hello ${world}` >= some();", 1174 getGoogleJSStyleWithColumns(35)); // Barely fits. 1175 verifyFormat("var x = `hellö ${wörld}` >= söme();", 1176 getGoogleJSStyleWithColumns(35)); // Fits due to UTF-8. 1177 verifyFormat("var x = `hello\n" 1178 " ${world}` >=\n" 1179 " some();", 1180 "var x =\n" 1181 " `hello\n" 1182 " ${world}` >= some();", 1183 getGoogleJSStyleWithColumns(21)); // Barely doesn't fit. 1184 verifyFormat("var x = `hello\n" 1185 " ${world}` >= some();", 1186 "var x =\n" 1187 " `hello\n" 1188 " ${world}` >= some();", 1189 getGoogleJSStyleWithColumns(22)); // Barely fits. 1190 1191 verifyFormat("var x =\n" 1192 " `h`;", 1193 getGoogleJSStyleWithColumns(11)); 1194 verifyFormat("var x =\n `multi\n line`;", "var x = `multi\n line`;", 1195 getGoogleJSStyleWithColumns(13)); 1196 verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n" 1197 " `aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`);"); 1198 // Repro for an obscure width-miscounting issue with template strings. 1199 verifyFormat( 1200 "someLongVariable =\n" 1201 " " 1202 "`${logPrefix[11]}/${logPrefix[12]}/${logPrefix[13]}${logPrefix[14]}`;", 1203 "someLongVariable = " 1204 "`${logPrefix[11]}/${logPrefix[12]}/${logPrefix[13]}${logPrefix[14]}`;"); 1205 1206 // Make sure template strings get a proper ColumnWidth assigned, even if they 1207 // are first token in line. 1208 verifyFormat( 1209 "var a = aaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n" 1210 " `aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa`;"); 1211 1212 // Two template strings. 1213 verifyFormat("var x = `hello` == `hello`;"); 1214 1215 // Comments in template strings. 1216 verifyFormat("var x = `//a`;\n" 1217 "var y;", 1218 "var x =\n `//a`;\n" 1219 "var y ;"); 1220 verifyFormat("var x = `/*a`;\n" 1221 "var y;", 1222 "var x =\n `/*a`;\n" 1223 "var y;"); 1224 // Unterminated string literals in a template string. 1225 verifyFormat("var x = `'`; // comment with matching quote '\n" 1226 "var y;"); 1227 verifyFormat("var x = `\"`; // comment with matching quote \"\n" 1228 "var y;"); 1229 verifyFormat("it(`'aaaaaaaaaaaaaaa `, aaaaaaaaa);", 1230 "it(`'aaaaaaaaaaaaaaa `, aaaaaaaaa) ;", 1231 getGoogleJSStyleWithColumns(40)); 1232 // Backticks in a comment - not a template string. 1233 verifyFormat("var x = 1 // `/*a`;\n" 1234 " ;", 1235 "var x =\n 1 // `/*a`;\n" 1236 " ;"); 1237 verifyFormat("/* ` */ var x = 1; /* ` */", "/* ` */ var x\n= 1; /* ` */"); 1238 // Comment spans multiple template strings. 1239 verifyFormat("var x = `/*a`;\n" 1240 "var y = ` */ `;", 1241 "var x =\n `/*a`;\n" 1242 "var y =\n ` */ `;"); 1243 // Escaped backtick. 1244 verifyFormat("var x = ` \\` a`;\n" 1245 "var y;", 1246 "var x = ` \\` a`;\n" 1247 "var y;"); 1248 // Escaped dollar. 1249 verifyFormat("var x = ` \\${foo}`;\n"); 1250 } 1251 1252 TEST_F(FormatTestJS, NestedTemplateStrings) { 1253 verifyFormat( 1254 "var x = `<ul>${xs.map(x => `<li>${x}</li>`).join('\\n')}</ul>`;"); 1255 verifyFormat("var x = `he${({text: 'll'}.text)}o`;"); 1256 } 1257 1258 TEST_F(FormatTestJS, TaggedTemplateStrings) { 1259 verifyFormat("var x = html`<ul>`;"); 1260 } 1261 1262 TEST_F(FormatTestJS, CastSyntax) { 1263 verifyFormat("var x = <type>foo;"); 1264 verifyFormat("var x = foo as type;"); 1265 verifyFormat("let x = (a + b) as\n" 1266 " LongTypeIsLong;", 1267 getGoogleJSStyleWithColumns(20)); 1268 verifyFormat("foo = <Bar[]>[\n" 1269 " 1, //\n" 1270 " 2\n" 1271 "];"); 1272 verifyFormat("var x = [{x: 1} as type];"); 1273 verifyFormat("x = x as [a, b];"); 1274 verifyFormat("x = x as {a: string};"); 1275 verifyFormat("x = x as (string);"); 1276 verifyFormat("x = x! as (string);"); 1277 } 1278 1279 TEST_F(FormatTestJS, TypeArguments) { 1280 verifyFormat("class X<Y> {}"); 1281 verifyFormat("new X<Y>();"); 1282 verifyFormat("foo<Y>(a);"); 1283 verifyFormat("var x: X<Y>[];"); 1284 verifyFormat("class C extends D<E> implements F<G>, H<I> {}"); 1285 verifyFormat("function f(a: List<any> = null) {}"); 1286 verifyFormat("function f(): List<any> {}"); 1287 verifyFormat("function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa():\n" 1288 " bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb {}"); 1289 verifyFormat("function aaaaaaaaaa(\n" 1290 " aaaaaaaaaaaaaaaa: aaaaaaaaaaaaaaaaaaa,\n" 1291 " aaaaaaaaaaaaaaaa: aaaaaaaaaaaaaaaaaaa):\n" 1292 " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa {}"); 1293 } 1294 1295 TEST_F(FormatTestJS, UserDefinedTypeGuards) { 1296 verifyFormat( 1297 "function foo(check: Object):\n" 1298 " check is {foo: string, bar: string, baz: string, foobar: string} {\n" 1299 " return 'bar' in check;\n" 1300 "}\n"); 1301 } 1302 1303 TEST_F(FormatTestJS, OptionalTypes) { 1304 verifyFormat("function x(a?: b, c?, d?) {}"); 1305 verifyFormat("class X {\n" 1306 " y?: z;\n" 1307 " z?;\n" 1308 "}"); 1309 verifyFormat("interface X {\n" 1310 " y?(): z;\n" 1311 "}"); 1312 verifyFormat("constructor({aa}: {\n" 1313 " aa?: string,\n" 1314 " aaaaaaaa?: string,\n" 1315 " aaaaaaaaaaaaaaa?: boolean,\n" 1316 " aaaaaa?: List<string>\n" 1317 "}) {}"); 1318 } 1319 1320 TEST_F(FormatTestJS, IndexSignature) { 1321 verifyFormat("var x: {[k: string]: v};"); 1322 } 1323 1324 TEST_F(FormatTestJS, WrapAfterParen) { 1325 verifyFormat("xxxxxxxxxxx(\n" 1326 " aaa, aaa);", 1327 getGoogleJSStyleWithColumns(20)); 1328 verifyFormat("xxxxxxxxxxx(\n" 1329 " aaa, aaa, aaa,\n" 1330 " aaa, aaa, aaa);", 1331 getGoogleJSStyleWithColumns(20)); 1332 verifyFormat("xxxxxxxxxxx(\n" 1333 " aaaaaaaaaaaaaaaaaaaaaaaa,\n" 1334 " function(x) {\n" 1335 " y(); //\n" 1336 " });", 1337 getGoogleJSStyleWithColumns(40)); 1338 verifyFormat("while (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&\n" 1339 " bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}"); 1340 } 1341 1342 TEST_F(FormatTestJS, JSDocAnnotations) { 1343 verifyFormat("/**\n" 1344 " * @export {this.is.a.long.path.to.a.Type}\n" 1345 " */", 1346 "/**\n" 1347 " * @export {this.is.a.long.path.to.a.Type}\n" 1348 " */", 1349 getGoogleJSStyleWithColumns(20)); 1350 } 1351 1352 TEST_F(FormatTestJS, RequoteStringsSingle) { 1353 verifyFormat("var x = 'foo';", "var x = \"foo\";"); 1354 verifyFormat("var x = 'fo\\'o\\'';", "var x = \"fo'o'\";"); 1355 verifyFormat("var x = 'fo\\'o\\'';", "var x = \"fo\\'o'\";"); 1356 verifyFormat( 1357 "var x =\n" 1358 " 'foo\\'';", 1359 // Code below is 15 chars wide, doesn't fit into the line with the 1360 // \ escape added. 1361 "var x = \"foo'\";", getGoogleJSStyleWithColumns(15)); 1362 // Removes no-longer needed \ escape from ". 1363 verifyFormat("var x = 'fo\"o';", "var x = \"fo\\\"o\";"); 1364 // Code below fits into 15 chars *after* removing the \ escape. 1365 verifyFormat("var x = 'fo\"o';", "var x = \"fo\\\"o\";", 1366 getGoogleJSStyleWithColumns(15)); 1367 verifyFormat("// clang-format off\n" 1368 "let x = \"double\";\n" 1369 "// clang-format on\n" 1370 "let x = 'single';\n", 1371 "// clang-format off\n" 1372 "let x = \"double\";\n" 1373 "// clang-format on\n" 1374 "let x = \"single\";\n"); 1375 } 1376 1377 TEST_F(FormatTestJS, RequoteAndIndent) { 1378 verifyFormat("let x = someVeryLongFunctionThatGoesOnAndOn(\n" 1379 " 'double quoted string that needs wrapping');", 1380 "let x = someVeryLongFunctionThatGoesOnAndOn(" 1381 "\"double quoted string that needs wrapping\");"); 1382 1383 verifyFormat("let x =\n" 1384 " 'foo\\'oo';\n" 1385 "let x =\n" 1386 " 'foo\\'oo';", 1387 "let x=\"foo'oo\";\n" 1388 "let x=\"foo'oo\";", 1389 getGoogleJSStyleWithColumns(15)); 1390 } 1391 1392 TEST_F(FormatTestJS, RequoteStringsDouble) { 1393 FormatStyle DoubleQuotes = getGoogleStyle(FormatStyle::LK_JavaScript); 1394 DoubleQuotes.JavaScriptQuotes = FormatStyle::JSQS_Double; 1395 verifyFormat("var x = \"foo\";", DoubleQuotes); 1396 verifyFormat("var x = \"foo\";", "var x = 'foo';", DoubleQuotes); 1397 verifyFormat("var x = \"fo'o\";", "var x = 'fo\\'o';", DoubleQuotes); 1398 } 1399 1400 TEST_F(FormatTestJS, RequoteStringsLeave) { 1401 FormatStyle LeaveQuotes = getGoogleStyle(FormatStyle::LK_JavaScript); 1402 LeaveQuotes.JavaScriptQuotes = FormatStyle::JSQS_Leave; 1403 verifyFormat("var x = \"foo\";", LeaveQuotes); 1404 verifyFormat("var x = 'foo';", LeaveQuotes); 1405 } 1406 1407 TEST_F(FormatTestJS, SupportShebangLines) { 1408 verifyFormat("#!/usr/bin/env node\n" 1409 "var x = hello();", 1410 "#!/usr/bin/env node\n" 1411 "var x = hello();"); 1412 } 1413 1414 TEST_F(FormatTestJS, NonNullAssertionOperator) { 1415 verifyFormat("let x = foo!.bar();\n"); 1416 verifyFormat("let x = foo ? bar! : baz;\n"); 1417 verifyFormat("let x = !foo;\n"); 1418 verifyFormat("let x = foo[0]!;\n"); 1419 verifyFormat("let x = (foo)!;\n"); 1420 verifyFormat("let x = {foo: 1}!;\n"); 1421 } 1422 1423 TEST_F(FormatTestJS, Conditional) { 1424 verifyFormat("y = x ? 1 : 2;"); 1425 verifyFormat("x ? 1 : 2;"); 1426 verifyFormat("class Foo {\n" 1427 " field = true ? 1 : 2;\n" 1428 " method(a = true ? 1 : 2) {}\n" 1429 "}"); 1430 } 1431 1432 } // end namespace tooling 1433 } // end namespace clang 1434