code.delx.au - gnu-emacs-elpa/blob - tests/parser.el

   1 ;;; tests/parser.el --- Some tests for js2-mode.
   2
   3 ;; Copyright (C) 2009, 2011-2013  Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software: you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation, either version 3 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 ;;; Code:
  21
  22 (require 'ert)
  23 (require 'ert-x)
  24 (require 'js2-mode)
  25 (require 'cl-lib)
  26
  27 (defmacro js2-deftest (name buffer-contents &rest body)
  28   (declare (indent defun))
  29   `(ert-deftest ,(intern (format "js2-%s" name)) ()
  30      (with-temp-buffer
  31        (save-excursion
  32          (insert ,buffer-contents))
  33        (unwind-protect
  34            (progn
  35              ,@body)
  36          (fundamental-mode)))))
  37
  38 (defun js2-test-string-to-ast (s)
  39   (insert s)
  40   (js2-mode)
  41   (should (null js2-mode-buffer-dirty-p))
  42   js2-mode-ast)
  43
  44 (cl-defun js2-test-parse-string (code-string &key syntax-error errors-count
  45                                              reference)
  46   (ert-with-test-buffer (:name 'origin)
  47     (let ((ast (js2-test-string-to-ast code-string)))
  48       (if syntax-error
  49           (let ((errors (js2-ast-root-errors ast)))
  50             (should (= (or errors-count 1) (length errors)))
  51             (cl-destructuring-bind (_ pos len) (car (last errors))
  52               (should (string= syntax-error (substring code-string
  53                                                        (1- pos) (+ pos len -1))))))
  54         (should (= 0 (length (js2-ast-root-errors ast))))
  55         (ert-with-test-buffer (:name 'copy)
  56           (js2-print-tree ast)
  57           (skip-chars-backward " \t\n")
  58           (should (string= (or reference code-string)
  59                            (buffer-substring-no-properties
  60                             (point-min) (point)))))))))
  61
  62 (cl-defmacro js2-deftest-parse (name code-string &key bind syntax-error errors-count
  63                                      reference)
  64   "Parse CODE-STRING.  If SYNTAX-ERROR is nil, print syntax tree
  65 with `js2-print-tree' and assert the result to be equal to
  66 REFERENCE, if present, or the original string.  If SYNTAX-ERROR
  67 is passed, expect syntax error highlighting substring equal to
  68 SYNTAX-ERROR value.  BIND defines bindings to apply them around
  69 the test."
  70   (declare (indent defun))
  71   `(ert-deftest ,(intern (format "js2-%s" name)) ()
  72      (let ,(append bind '((js2-basic-offset 2)))
  73        (js2-test-parse-string ,code-string
  74                               :syntax-error ,syntax-error
  75                               :errors-count ,errors-count
  76                               :reference ,reference))))
  77
  78 ;;; Basics
  79
  80 (js2-deftest-parse variable-assignment
  81   "a = 1;")
  82
  83 (js2-deftest-parse empty-object-literal
  84   "b = {};")
  85
  86 (js2-deftest-parse empty-array-literal
  87   "c = [];")
  88
  89 (js2-deftest-parse array-with-missing-elements
  90   "var a = [1, 2, ,];")
  91
  92 (js2-deftest-parse comma-after-regexp
  93   "d = /eee/, 42;")
  94
  95 (js2-deftest-parse return-statement
  96   "function foo() {\n  return 2;\n}")
  97
  98 (js2-deftest-parse function-statement
  99   "function foo() {\n}")
 100
 101 (js2-deftest-parse function-statement-inside-block
 102   "if (true) {\n  function foo() {\n  }\n}")
 103
 104 (js2-deftest-parse function-expression-statements-are-verboten
 105   "function() {}" :syntax-error "(")
 106
 107 (js2-deftest-parse member-expr-as-function-name
 108   "function a.b.c[2](x, y) {\n}"
 109   :bind ((js2-allow-member-expr-as-function-name t)))
 110
 111 (js2-deftest-parse named-function-expression
 112   "a = function b() {};")
 113
 114 (js2-deftest-parse parenthesized-expression
 115   "(1 + 2);")
 116
 117 (js2-deftest-parse for-with-in-operator-in-parens
 118   "for (var y = (0 in []) in {}) {\n}")
 119
 120 (js2-deftest-parse for-with-in-operator-in-cond
 121   "for (var y = 1 ? 0 in [] : false in {}) {\n}")
 122
 123 (js2-deftest-parse let-expression
 124   "(let (x = 42) x);")
 125
 126 (js2-deftest-parse let-expression-statement
 127   "let (x = 42) x;")
 128
 129 (js2-deftest-parse void
 130   "void 0;")
 131
 132 ;;; Callers of `js2-valid-prop-name-token'
 133
 134 (js2-deftest-parse parse-property-access-when-not-keyword
 135   "A.foo = 3;")
 136
 137 (js2-deftest-parse parse-property-access-when-keyword
 138   "A.in = 3;"
 139   :bind ((js2-allow-keywords-as-property-names t)))
 140
 141 (js2-deftest-parse parse-property-access-when-keyword-no-xml
 142   "A.in = 3;"
 143   :bind ((js2-allow-keywords-as-property-names t)
 144          (js2-compiler-xml-available nil)))
 145
 146 (js2-deftest-parse parse-object-literal-when-not-keyword
 147   "a = {b: 1};")
 148
 149 (js2-deftest-parse parse-object-literal-when-keyword
 150   "a = {in: 1};"
 151   :bind ((js2-allow-keywords-as-property-names t)))
 152
 153 ;;; 'of' contextual keyword
 154
 155 (js2-deftest-parse parse-legacy-array-comp-loop-with-of
 156   "[a for (a of [])];")
 157
 158 (js2-deftest-parse parse-array-comp-loop
 159   "[for (a of []) a];")
 160
 161 (js2-deftest-parse parse-for-of
 162   "for (var a of []) {\n}")
 163
 164 (js2-deftest-parse of-can-be-name
 165   "void of;")
 166
 167 (js2-deftest-parse of-can-be-object-name
 168   "of.z;")
 169
 170 (js2-deftest-parse of-can-be-var-name
 171   "var of = 3;")
 172
 173 (js2-deftest-parse of-can-be-function-name
 174   "function of() {\n}")
 175
 176 ;;; Destructuring binding
 177
 178 (js2-deftest-parse destruct-in-declaration
 179   "var {a, b} = {a: 1, b: 2};")
 180
 181 (js2-deftest-parse destruct-in-arguments
 182   "function f({a: aa, b: bb}) {\n}")
 183
 184 (js2-deftest-parse destruct-in-array-comp-loop
 185   "[a + b for ([a, b] in [[0, 1], [1, 2]])];")
 186
 187 (js2-deftest-parse destruct-in-catch-clause
 188   "try {\n} catch ({a, b}) {\n  a + b;\n}")
 189
 190 (js2-deftest-parse destruct-with-initializer-in-object
 191   "var {a, b = 2, c} = {};")
 192
 193 (js2-deftest-parse destruct-with-initializer-in-array
 194   "var [a, b = 2, c] = [];")
 195
 196 (js2-deftest-parse destruct-non-name-target-is-error
 197   "var {1=1} = {};" :syntax-error "1" :errors-count 1)
 198
 199 (js2-deftest-parse destruct-with-initializer-in-function-params
 200   "function f({a, b = 1, c}, [d, e = 1, f]) {\n}")
 201
 202 (js2-deftest-parse destruct-with-default-in-function-params
 203   "function f({x = 1, y = 2} = {}, [x, y] = [1, 2]) {\n}")
 204
 205 (js2-deftest-parse destruct-name-conflict-is-error-in-object
 206   "\"use strict\";\nvar {a=1,a=2} = {};" :syntax-error "a" :errors-count 1)
 207
 208 (js2-deftest destruct-name-conflict-is-warning-in-array "\"use strict\";\nvar [a=1,a=2] = [];"
 209   (js2-mode)
 210   (should (equal '("msg.var.redecl" "a")
 211                  (caar js2-parsed-warnings))))
 212
 213 (js2-deftest initializer-outside-destruct-is-error "({a=1});"
 214   (js2-mode)
 215   (should (equal "msg.init.no.destruct"
 216                  (car (caar js2-parsed-errors)))))
 217
 218 ;;; Object literals
 219
 220 (js2-deftest-parse object-literal-shorthand
 221   "var x = {a: 1, b, c: 1, d};")
 222
 223 (js2-deftest-parse object-literal-shorthard-with-number
 224   "var a = {1};" :syntax-error "}" :errors-count 2)
 225
 226 (js2-deftest-parse object-literal-method
 227   "var x = {f(y) {  return y;\n}};")
 228
 229 (js2-deftest object-literal-method-own-name-in-scope "({f(){f();}});"
 230   (js2-mode)
 231   (should (equal '("msg.undeclared.variable" "f")
 232                  (caar js2-parsed-warnings))))
 233
 234 (js2-deftest-parse object-literal-getter-method
 235   "var x = {get f() {  return 42;\n}};")
 236
 237 (js2-deftest-parse object-literal-setter-method
 238   "var x = {set f(y) {  x = y;\n}};")
 239
 240 (js2-deftest-parse object-literal-computed-keys
 241   "var x = {[Symbol.iterator]: function() {}};")
 242
 243 (js2-deftest-parse object-literal-computed-function-keys
 244   "var x = {[foo + bar](y) {  return y;\n}};")
 245
 246 (js2-deftest-parse object-literal-computed-getter-key
 247   "var x = {get [foo + bar]() {  return 42;\n}};")
 248
 249 (js2-deftest-parse object-literal-generator
 250   "var x = {*foo() {  yield 42;\n}};")
 251
 252 (js2-deftest-parse object-literal-computed-generator-key
 253   "var x = {*[foo + bar]() {  yield 42;\n}};")
 254
 255 ;;; Function definition
 256
 257 (js2-deftest function-redeclaring-var "var gen = 3; function gen() {};"
 258   (js2-mode)
 259   (should (= (length (js2-ast-root-warnings js2-mode-ast)) 1)))
 260
 261 (js2-deftest function-expression-var-same-name "var gen = function gen() {};"
 262   (js2-mode)
 263   (should (null (js2-ast-root-warnings js2-mode-ast))))
 264
 265 ;;; Function parameters
 266
 267 (js2-deftest-parse function-with-default-parameters
 268   "function foo(a = 1, b = a + 1) {\n}")
 269
 270 (js2-deftest-parse function-with-no-default-after-default
 271   "function foo(a = 1, b) {\n}")
 272
 273 (js2-deftest-parse function-with-destruct-after-default
 274   "function foo(a = 1, {b, c}) {\n}")
 275
 276 (js2-deftest-parse function-with-rest-parameter
 277   "function foo(a, b, ...rest) {\n}")
 278
 279 (js2-deftest-parse function-with-param-after-rest-parameter
 280   "function foo(a, ...b, rest) {\n}"
 281   :syntax-error "rest")
 282
 283 (js2-deftest-parse function-with-destruct-after-rest-parameter
 284   "function foo(a, ...b, {}) {\n}"
 285   :syntax-error "{}")
 286
 287 (js2-deftest-parse function-with-rest-after-default-parameter
 288   "function foo(a = 1, ...rest) {\n}")
 289
 290 ;;; Strict mode errors
 291
 292 (js2-deftest-parse function-bad-strict-parameters
 293   "'use strict';\nfunction foo(eval, {arguments}, bar) {\n}"
 294   :syntax-error "eval" :errors-count 2)
 295
 296 (js2-deftest-parse function-retroactive-bad-strict-parameters
 297   "function foo(arguments) {'use strict';}"
 298   :syntax-error "arguments" :errors-count 1)
 299
 300 (js2-deftest-parse function-duplicate-strict-parameters
 301   "'use strict';\nfunction foo(a, a) {\n}"
 302   :syntax-error "a" :errors-count 1)
 303
 304 (js2-deftest-parse function-bad-strict-function-name
 305   "'use strict';\nfunction eval() {\n}"
 306   :syntax-error "eval" :errors-count 1)
 307
 308 (js2-deftest-parse function-bad-retroactive-strict-function-name
 309   "function arguments() {'use strict';}"
 310   :syntax-error "arguments" :errors-count 1)
 311
 312 (js2-deftest-parse function-bad-strict-catch-name
 313   "'use strict';\ntry {} catch (eval) {}"
 314   :syntax-error "eval" :errors-count 1)
 315
 316 (js2-deftest-parse function-bad-strict-variable-name
 317   "'use strict';\nvar eval = 'kekeke';"
 318   :syntax-error "eval" :errors-count 1)
 319
 320 (js2-deftest-parse function-bad-strict-assignment
 321   "'use strict';\narguments = 'fufufu';"
 322   :syntax-error "arguments" :errors-count 1)
 323
 324 (js2-deftest-parse function-property-strict-assignment
 325   "'use strict';\narguments.okay = 'alright';")
 326
 327 (js2-deftest-parse function-strict-with
 328   "'use strict';\nwith ({}) {}"
 329   :syntax-error "with" :errors-count 1)
 330
 331 (js2-deftest-parse function-strict-octal
 332   "'use strict';\nvar number = 0644;"
 333   :syntax-error "0644" :errors-count 1)
 334
 335 (js2-deftest-parse function-strict-octal-allow-0o
 336   "'use strict';\n0o644;" :reference "'use strict';\n420;")
 337
 338 (js2-deftest-parse function-strict-duplicate-keys
 339   "'use strict';\nvar object = {a: 1, a: 2, 'a': 3, ['a']: 4, 1: 5, '1': 6, [1 + 1]: 7};"
 340   :syntax-error "a" :errors-count 4) ; "a" has 3 dupes, "1" has 1 dupe.
 341
 342 (js2-deftest-parse function-strict-duplicate-getter
 343   "'use strict';\nvar a = {get x() {}, get x() {}};"
 344   :syntax-error "x" :errors-count 1)
 345
 346 (js2-deftest-parse function-strict-duplicate-setter
 347   "'use strict';\nvar a = {set x() {}, set x() {}};"
 348   :syntax-error "x" :errors-count 1)
 349
 350 ;;; Lack of errors in strict mode
 351
 352 (js2-deftest-parse function-strict-const-scope
 353   "'use strict';\nconst a;\nif (1) {\n  const a;\n}")
 354
 355 (js2-deftest-parse function-strict-no-getter-setter-duplicate
 356   "'use strict';\nvar a = {get x() {}, set x() {}};")
 357
 358 ;;; Spread operator
 359
 360 (js2-deftest-parse spread-in-array-literal
 361   "[1, ...[2, 3], 4, ...[5, 6]];")
 362
 363 (js2-deftest-parse spread-in-function-call
 364   "f(3, ...[t(2), t(3)], 42, ...[t(4)]);")
 365
 366 (js2-deftest-parse rest-in-array-destructure
 367   "let [x, y, z, ...w] = [1, ...a, ...b, c];")
 368
 369 (js2-deftest-parse comma-after-rest-in-array
 370   "let [...x,] = [1, 2, 3];"
 371   :syntax-error "," :errors-count 1)
 372
 373 (js2-deftest-parse elem-after-rest-in-array
 374   "let [...x, y] = [1, 2, 3];"
 375   :syntax-error "," :errors-count 2)
 376
 377 (js2-deftest-parse array-destructure-expr-default
 378   "let [[x] = [3]] = y;")
 379
 380 ;;; Arrow functions
 381
 382 (js2-deftest-parse arrow-function-with-empty-args-and-no-curlies
 383   "() => false;" :reference "() => {false};")
 384
 385 (js2-deftest-parse arrow-function-with-args-and-curlies
 386   "(a, b = 1, ...c) => {  c;\n};")
 387
 388 (js2-deftest-parse arrow-function-with-destructuring
 389   "([{a}, b]) => {  a + b;\n};")
 390
 391 (js2-deftest-parse parenless-arrow-function-prohibits-rest
 392   "...b => {b + 1;};" :syntax-error "=>")
 393
 394 (js2-deftest-parse parenless-arrow-function-prohibits-destructuring
 395   "[a, b] => {a + b;};" :syntax-error "]" :errors-count 4)
 396
 397 (js2-deftest-parse arrow-function-recovers-from-error
 398   "[(,foo) => 1];" :syntax-error "," :errors-count 6)
 399
 400 ;;; Automatic semicolon insertion
 401
 402 (js2-deftest-parse no-auto-semi-insertion-after-if
 403   "if (true) {\n}")
 404
 405 (js2-deftest-parse auto-semi-insertion-after-function
 406   "a = function() {}" :reference "a = function() {};")
 407
 408 (js2-deftest-parse auto-semi-one-variable-per-line
 409   "x\ny" :reference "x;\ny;")
 410
 411 ;;; Labels
 412
 413 (js2-deftest-parse labeled-stmt-node
 414   "foo:\nbar:\nx = y + 1;")
 415
 416 (js2-deftest no-label-node-inside-expr "x = y:"
 417   (let (js2-parse-interruptable-p)
 418     (js2-mode))
 419   (let ((assignment (js2-expr-stmt-node-expr (car (js2-scope-kids js2-mode-ast)))))
 420     (should (js2-name-node-p (js2-assign-node-right assignment)))))
 421
 422 (js2-deftest-parse label-and-loops "for (; ; ) {
 423   loop:
 424   for (; ; ) {
 425     continue loop;
 426   }
 427 }")
 428
 429 ;;; Generators
 430
 431 (js2-deftest-parse legacy-generator "function foo() {\n  yield 1;\n}")
 432
 433 (js2-deftest-parse legacy-generator-cannot-return
 434   "function foo() {\n  yield 1;\n return 2;\n}" :syntax-error "return 2")
 435
 436 (js2-deftest-parse harmony-generator "function* bar() {\n  yield 2;\n  return 3;\n}")
 437
 438 (js2-deftest-parse harmony-generator-yield-star "(function*(a) {  yield* a;\n});")
 439
 440 ;;; Comprehensions
 441
 442 (js2-deftest-parse parse-legacy-array-comp-loop-with-filter
 443   "[a for (a in b) if (a == 2)];")
 444
 445 (js2-deftest-parse parse-array-comp-loop-with-filters
 446   "[for (a in b) if (a == 2) if (b != 10) a];")
 447
 448 (js2-deftest-parse parse-generator-comp-loop-with-filters
 449   "(for (x of y) if (x != 4) x);")
 450
 451 (js2-deftest-parse parse-array-comp-with-yield-is-ok
 452   "(function() {  return [for (x of []) yield x];\n});")
 453
 454 (js2-deftest-parse parse-generator-comp-with-yield-is-not-ok
 455   "(function() {  return (for (x of []) yield x);\n});"
 456   :syntax-error "yield")
 457
 458 (js2-deftest-parse parse-generator-comp-with-yield-inside-function-is-ok
 459   "(for (x of []) function*() {  yield x;\n});")
 460
 461 ;;; Async
 462
 463 (js2-deftest-parse async-function-statement
 464   "async function foo() {\n}")
 465
 466 (js2-deftest-parse async-function-statement-inside-block
 467   "if (true) {\n  async function foo() {\n  }\n}")
 468
 469 (js2-deftest-parse async-function-expression-statements-are-verboten
 470   "async function() {}" :syntax-error "(")
 471
 472 (js2-deftest-parse async-named-function-expression
 473   "a = async function b() {};")
 474
 475 (js2-deftest-parse async-arrow-function-expression
 476   "a = async (b) => {  b;\n};")
 477
 478 (js2-deftest-parse async-method-in-object-literal
 479   "({async f() {}});")
 480
 481 (js2-deftest-parse async-method-in-class-body
 482   "class C {\n  async foo() {}\n}")
 483
 484 (js2-deftest-parse static-async-method-in-class-body
 485   "class C {\n  static async foo() {}\n}")
 486
 487 (js2-deftest-parse async-method-allow-await
 488   "({async f() {  await x;\n}});")
 489
 490 ;;; Await
 491
 492 (js2-deftest-parse await-is-ok "async function foo() {\n  await bar();\n}")
 493
 494 (js2-deftest-parse await-inside-assignment-is-ok
 495                    "async function foo() {\n  var result = await bar();\n}")
 496
 497 (js2-deftest-parse await-inside-array-is-ok
 498                    "async function foo() {\n  var results = [await bar(), await baz()];\n}")
 499
 500 (js2-deftest-parse await-inside-non-async-function-is-not-ok
 501                    "function foo() {\n  await bar();\n}"
 502                    :syntax-error "await")
 503
 504 (js2-deftest-parse await-inside-non-async-arrow-function-is-not-ok
 505                    "a = () => {  await bar();\n}"
 506                    :syntax-error "await")
 507
 508 ;;; 'async' and 'await' are contextual keywords
 509
 510 (js2-deftest-parse async-can-be-name
 511   "void async;")
 512
 513 (js2-deftest-parse async-can-be-object-name
 514   "async.z;")
 515
 516 (js2-deftest-parse async-can-be-var-name
 517   "var async = 3;")
 518
 519 (js2-deftest-parse async-can-be-function-name
 520   "function async() {\n}")
 521
 522 (js2-deftest-parse await-can-be-name
 523   "void await;")
 524
 525 (js2-deftest-parse await-can-be-object-name
 526   "await.z;")
 527
 528 (js2-deftest-parse await-can-be-var-name
 529   "var await = 3;")
 530
 531 (js2-deftest-parse await-can-be-function-name
 532   "function await() {\n}")
 533
 534 ;;; Numbers
 535
 536 (js2-deftest-parse decimal-starting-with-zero "081;" :reference "81;")
 537
 538 (js2-deftest-parse huge-hex "0x0123456789abcdefABCDEF;" :reference "-1;")
 539
 540 (js2-deftest-parse octal-without-o "071;" :reference "57;")
 541
 542 (js2-deftest-parse hex-number-okay "0x123;" :reference "291;")
 543
 544 (js2-deftest-parse hex-number-broken "0xz23;"
 545   :syntax-error "0xz" :errors-count 2)
 546
 547 (js2-deftest-parse binary-number-okay "0b101;" :reference "5;")
 548
 549 (js2-deftest-parse binary-number-broken "0b210;"
 550   :syntax-error "0b2" :errors-count 2)
 551
 552 (js2-deftest-parse octal-number-okay "0o765;" :reference "501;")
 553
 554 (js2-deftest-parse octal-number-broken "0o812;"
 555   :syntax-error "0o8" :errors-count 2)
 556
 557 ;;; Modules
 558
 559 (js2-deftest parse-export-bindings "{one, two as dos}"
 560   (js2-init-scanner)
 561   (should (js2-match-token js2-LC))
 562   (let ((imports (js2-parse-export-bindings)))
 563     (should (not (equal nil imports)))
 564     (should (= 2 (length imports)))
 565     (let ((first (nth 0 imports))
 566           (second (nth 1 imports)))
 567       (should (equal "one" (js2-name-node-name (js2-export-binding-node-extern-name first))))
 568       (should (equal "two" (js2-name-node-name (js2-export-binding-node-extern-name second))))
 569       (let ((first-name (js2-export-binding-node-local-name first))
 570             (second-name (js2-export-binding-node-local-name second)))
 571         (should (equal first (js2-node-parent first-name)))
 572         (should (equal 3 (js2-node-len first-name)))
 573         (should (equal "one" (js2-name-node-name first-name)))
 574         (should (equal second (js2-node-parent second-name)))
 575         (should (equal 3 (js2-node-len second-name)))
 576         (should (equal "dos" (js2-name-node-name second-name)))))))
 577
 578 (js2-deftest parse-export-binding-as-default "one as default"
 579   (js2-init-scanner)
 580   (let ((binding (js2-maybe-parse-export-binding)))
 581     (should binding)
 582     (should (js2-export-binding-node-p binding))
 583     (let ((name (js2-export-binding-node-local-name binding)))
 584       (should name)
 585       (should (equal "default" (js2-name-node-name name))))))
 586
 587 (js2-deftest parse-namepsace-import "* as lib;"
 588   (js2-init-scanner)
 589   (should (js2-match-token js2-MUL))
 590   (let ((namespace-import (js2-parse-namespace-import)))
 591     (should (not (equal nil namespace-import)))
 592     (should (js2-namespace-import-node-p namespace-import))
 593     (should (= 1 (js2-node-pos namespace-import)))
 594     (should (equal 8 (js2-node-len namespace-import)))
 595     (let ((name-node (js2-namespace-import-node-name namespace-import)))
 596       (should (equal "lib" (js2-name-node-name name-node)))
 597       (should (= 5 (js2-node-pos name-node))))))
 598
 599 (js2-deftest parse-from-clause "from 'foo/bar';"
 600   (js2-init-scanner)
 601   (let ((from (js2-parse-from-clause)))
 602     (should (not (equal nil from)))
 603     (should (= 1 (js2-node-pos from)))
 604     (should (= 14 (js2-node-len from)))
 605     (should (equal "foo/bar" (js2-from-clause-node-module-id from)))))
 606
 607 (js2-deftest parse-import-module-id-only "import 'src/lib'"
 608   (js2-init-scanner)
 609   (should (js2-match-token js2-IMPORT))
 610   (let ((import (js2-parse-import)))
 611     (should (not (equal nil import)))
 612     (should (= 1 (js2-node-pos import)))
 613     (should (= 16 (js2-node-len import)))
 614     (should (equal nil (js2-import-node-import import)))
 615     (should (equal nil (js2-import-node-from import)))))
 616
 617 (js2-deftest parse-imported-default-binding "import theDefault from 'src/lib'"
 618   (js2-push-scope (make-js2-scope :pos 0))
 619   (js2-init-scanner)
 620   (should (js2-match-token js2-IMPORT))
 621   (let ((import-node (js2-parse-import)))
 622     (should (not (equal nil import-node)))
 623     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 624     (let ((import (js2-import-node-import import-node)))
 625       (should (not (equal nil import)))
 626       (should (equal nil (js2-import-clause-node-namespace-import import)))
 627       (should (equal nil (js2-import-clause-node-named-imports import)))
 628       (let ((default (js2-import-clause-node-default-binding import)))
 629         (should (not (equal nil default)))
 630         (should (js2-export-binding-node-p default))
 631         (should (equal "theDefault" (js2-name-node-name (js2-export-binding-node-extern-name default)))))))
 632   (should (js2-scope-get-symbol js2-current-scope "theDefault")))
 633
 634 (js2-deftest parse-import-namespace-binding "import * as lib from 'src/lib'"
 635   (js2-push-scope (make-js2-scope :pos 0))
 636   (js2-init-scanner)
 637   (should (js2-match-token js2-IMPORT))
 638   (let ((import-node (js2-parse-import)))
 639     (should (not (equal nil import-node)))
 640     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 641     (let ((import (js2-import-node-import import-node)))
 642       (should (not (equal nil import)))
 643       (should (equal nil (js2-import-clause-node-default-binding import)))
 644       (should (equal nil (js2-import-clause-node-named-imports import)))
 645       (let ((ns-import (js2-import-clause-node-namespace-import import)))
 646         (should (not (equal nil ns-import)))
 647         (should (js2-namespace-import-node-p ns-import))
 648         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 649   (should (js2-scope-get-symbol js2-current-scope "lib")))
 650
 651 (js2-deftest parse-import-named-imports "import {foo as bar, baz} from 'src/lib'"
 652   (js2-push-scope (make-js2-scope :pos 0))
 653   (js2-init-scanner)
 654   (should (js2-match-token js2-IMPORT))
 655   (let ((import-node (js2-parse-import)))
 656     (should (not (equal nil import-node)))
 657     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 658     (let ((import (js2-import-node-import import-node)))
 659       (should (not (equal nil import)))
 660       (should (equal nil (js2-import-clause-node-default-binding import)))
 661       (should (equal nil (js2-import-clause-node-namespace-import import)))
 662       (let ((named-imports (js2-import-clause-node-named-imports import)))
 663         (should (not (equal nil named-imports)))
 664         (should (listp named-imports))
 665         (should (= 2 (length named-imports)))
 666         (let ((first (nth 0 named-imports))
 667               (second (nth 1 named-imports)))
 668           (should (equal "bar" (js2-name-node-name (js2-export-binding-node-local-name first))))
 669           (should (equal "baz" (js2-name-node-name (js2-export-binding-node-local-name second))))))))
 670   (should (js2-scope-get-symbol js2-current-scope "bar"))
 671   (should (js2-scope-get-symbol js2-current-scope "baz")))
 672
 673 (js2-deftest parse-import-default-and-namespace "import stuff, * as lib from 'src/lib'"
 674   (js2-push-scope (make-js2-scope :pos 0))
 675   (js2-init-scanner)
 676   (should (js2-match-token js2-IMPORT))
 677   (let ((import-node (js2-parse-import)))
 678     (should (not (equal nil import-node)))
 679     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 680     (let ((import (js2-import-node-import import-node)))
 681       (should (not (equal nil import)))
 682       (should (equal nil (js2-import-clause-node-named-imports import)))
 683       (let ((default (js2-import-clause-node-default-binding import))
 684             (ns-import (js2-import-clause-node-namespace-import import)))
 685         (should (not (equal nil default)))
 686         (should (equal "stuff" (js2-name-node-name (js2-export-binding-node-local-name default))))
 687         (should (not (equal nil ns-import)))
 688         (should (js2-namespace-import-node-p ns-import))
 689         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 690   (should (js2-scope-get-symbol js2-current-scope "stuff"))
 691   (should (js2-scope-get-symbol js2-current-scope "lib")))
 692
 693 (js2-deftest parse-import-default-and-named-imports
 694   "import robert as bob, {cookies, pi as PIE} from 'src/lib'"
 695   (js2-push-scope (make-js2-scope :pos 0))
 696   (js2-init-scanner)
 697   (should (js2-match-token js2-IMPORT))
 698   (let ((import-node (js2-parse-import)))
 699     (should (not (equal nil import-node)))
 700     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 701     (let ((import (js2-import-node-import import-node)))
 702       (should (not (equal nil import)))
 703       (should (not (equal nil (js2-import-clause-node-named-imports import))))
 704       (let ((default (js2-import-clause-node-default-binding import))
 705             (named-imports (js2-import-clause-node-named-imports import)))
 706         (should (not (equal nil default)))
 707         (should (equal "bob" (js2-name-node-name (js2-export-binding-node-local-name default))))
 708         (should (not (equal nil named-imports)))
 709         (should (= 2 (length named-imports))))))
 710   (should (js2-scope-get-symbol js2-current-scope "bob"))
 711   (should (js2-scope-get-symbol js2-current-scope "cookies"))
 712   (should (js2-scope-get-symbol js2-current-scope "PIE")))
 713
 714 (js2-deftest parse-this-module-in-from-clause "import {url} from this module;"
 715   (js2-push-scope (make-js2-scope :pos 0))
 716   (js2-init-scanner)
 717   (should (js2-match-token js2-IMPORT))
 718   (let ((import-node (js2-parse-import)))
 719     (should import-node)
 720     (let ((from-clause (js2-import-node-from import-node)))
 721       (should from-clause)
 722       (should (equal "this" (js2-from-clause-node-module-id from-clause)))
 723       (should (js2-from-clause-node-metadata-p from-clause)))))
 724
 725 (js2-deftest-parse import-only-for-side-effects "import 'src/lib';")
 726 (js2-deftest-parse import-default-only "import theDefault from 'src/lib';")
 727 (js2-deftest-parse import-named-only "import {one, two} from 'src/lib';")
 728 (js2-deftest-parse import-default-and-named "import theDefault, {one, two} from 'src/lib';")
 729 (js2-deftest-parse import-renaming-default "import * as lib from 'src/mylib';")
 730 (js2-deftest-parse import-renaming-named "import {one as uno, two as dos} from 'src/lib';")
 731 (js2-deftest-parse import-default-and-namespace "import robert as bob, * as lib from 'src/lib';")
 732 (js2-deftest-parse import-from-this-module "import {url} from this module;")
 733
 734 ;; Module Exports
 735
 736 (js2-deftest export-rexport "export * from 'other/lib'"
 737   (js2-init-scanner)
 738   (should (js2-match-token js2-EXPORT))
 739   (let ((export-node (js2-parse-export)))
 740     (should export-node)
 741     (should (js2-export-node-from-clause export-node))))
 742
 743 (js2-deftest export-export-named-list "export {foo, bar as bang};"
 744   (js2-init-scanner)
 745   (should (js2-match-token js2-EXPORT))
 746   (let ((export-node (js2-parse-export)))
 747     (should export-node)
 748     (let ((exports (js2-export-node-exports-list export-node)))
 749       (should exports)
 750       (should (= 2 (length exports))))))
 751
 752 (js2-deftest re-export-named-list "export {foo, bar as bang} from 'other/lib'"
 753   (js2-init-scanner)
 754   (should (js2-match-token js2-EXPORT))
 755   (let ((export-node (js2-parse-export)))
 756     (should export-node)
 757     (should (js2-export-node-from-clause export-node))
 758     (let ((exports (js2-export-node-exports-list export-node)))
 759       (should exports)
 760       (should (= 2 (length exports))))))
 761
 762 (js2-deftest export-variable-statement "export var foo = 'bar', baz = 'bang';"
 763   (js2-init-scanner)
 764   (js2-push-scope (make-js2-scope :pos 0))
 765   (should (js2-match-token js2-EXPORT))
 766   (let ((export-node (js2-parse-export)))
 767     (should export-node)
 768     (should (js2-export-node-declaration export-node))))
 769
 770 (js2-deftest export-const-declaration "export const PI = Math.PI;"
 771   (js2-init-scanner)
 772   (js2-push-scope (make-js2-scope :pos 0))
 773   (should (js2-match-token js2-EXPORT))
 774   (let ((export-node (js2-parse-export)))
 775     (should export-node)
 776     (should (js2-export-node-declaration export-node))))
 777
 778 (js2-deftest export-let-declaration "export let foo = [1];"
 779   (js2-init-scanner)
 780   (js2-push-scope (make-js2-scope :pos 0))
 781   (should (js2-match-token js2-EXPORT))
 782   (let ((export-node (js2-parse-export)))
 783     (should export-node)
 784     (should (js2-var-decl-node-p (js2-export-node-declaration export-node)))))
 785
 786 (js2-deftest export-class-declaration "export class Foo {}"
 787   (js2-init-scanner)
 788   (js2-push-scope (make-js2-scope :pos 0))
 789   (should (js2-match-token js2-EXPORT))
 790   (let ((export-node (js2-parse-export)))
 791     (should export-node)
 792     (should (js2-class-node-p (js2-export-node-declaration export-node)))))
 793
 794 (js2-deftest export-function-declaration "export default function doStuff() {}"
 795   (js2-init-scanner)
 796   (js2-push-scope (make-js2-scope :pos 0))
 797   (should (js2-match-token js2-EXPORT))
 798   (let ((export-node (js2-parse-export)))
 799     (should export-node)
 800     (should (js2-export-node-default export-node))))
 801
 802 (js2-deftest export-generator-declaration "export default function* one() {}"
 803   (js2-init-scanner)
 804   (js2-push-scope (make-js2-scope :pos 0))
 805   (should (js2-match-token js2-EXPORT))
 806   (let ((export-node (js2-parse-export)))
 807     (should export-node)
 808     (should (js2-export-node-default export-node))))
 809
 810 (js2-deftest export-assignment-expression "export default a = b;"
 811   (js2-init-scanner)
 812   (js2-push-scope (make-js2-scope :pos 0))
 813   (should (js2-match-token js2-EXPORT))
 814   (let ((export-node (js2-parse-export)))
 815     (should export-node)
 816     (should (js2-export-node-default export-node))))
 817
 818 (js2-deftest export-function-no-semicolon "export default function foo() {}"
 819   (js2-mode)
 820   (should (equal nil js2-parsed-warnings)))
 821 (js2-deftest export-default-function-no-semicolon "export function foo() {}"
 822   (js2-mode)
 823   (should (equal nil js2-parsed-warnings)))
 824 (js2-deftest export-anything-else-does-require-a-semicolon "export var obj = {}"
 825   (js2-mode)
 826   (should (not (equal nil js2-parsed-warnings))))
 827
 828 (js2-deftest export-default-async-function-no-semicolon "export default async function foo() {}"
 829   (js2-mode)
 830   (should (equal nil js2-parsed-warnings)))
 831 (js2-deftest export-async-function-no-semicolon "export async function foo() {}"
 832   (js2-mode)
 833   (should (equal nil js2-parsed-warnings)))
 834
 835 (js2-deftest-parse parse-export-rexport "export * from 'other/lib';")
 836 (js2-deftest-parse parse-export-export-named-list "export {foo, bar as bang};")
 837 (js2-deftest-parse parse-re-export-named-list "export {foo, bar as bang} from 'other/lib';")
 838 (js2-deftest-parse parse-export-const-declaration "export const PI = Math.PI;")
 839 (js2-deftest-parse parse-export-let-declaration "export let foo = [1];")
 840 (js2-deftest-parse parse-export-function-declaration "export default function doStuff() {\n}")
 841 (js2-deftest-parse parse-export-generator-declaration "export default function* one() {\n}")
 842 (js2-deftest-parse parse-export-assignment-expression "export default a = b;")
 843
 844 (js2-deftest-parse parse-export-function-declaration-no-semi
 845   "export function f() {\n}")
 846
 847 (js2-deftest-parse parse-export-class-declaration-no-semi
 848   "export class C {\n}")
 849
 850 (js2-deftest-parse parse-export-async-function-allow-await
 851   "export async function f() {\n  await f();\n}")
 852
 853 (js2-deftest-parse parse-export-default-async-function-allow-await
 854   "export default async function f() {\n  await f();\n}")
 855
 856 ;;; Strings
 857
 858 (js2-deftest-parse string-literal
 859   "var x = 'y';")
 860
 861 (js2-deftest-parse object-get-string-literal
 862   "var x = {y: 5};\nvar z = x[\"y\"];")
 863
 864 (js2-deftest-parse template-no-substritutions
 865   "var x = `abc
 866             def`, y = `\\u0000`;")
 867
 868 (js2-deftest-parse template-with-substitutions
 869   "var y = `${a + b} ${d + e + f}`;")
 870
 871 (js2-deftest-parse tagged-template
 872   "foo.args`${++x, \"o\"}k`;")
 873
 874 ;;; Classes
 875
 876 (js2-deftest-parse parse-harmony-class-statement
 877   "class Foo {\n  get bar() {  return 42;\n}\n  set bar(x) {  y = x;\n}\n}")
 878
 879 (js2-deftest-parse parse-harmony-class-statement-without-name-is-not-ok
 880   "class {\n  get bar() {  return 42;\n}\n}"
 881   :syntax-error "{")
 882
 883 (js2-deftest-parse parse-harmony-class-expression
 884   "var Foo1 = class Foo {\n  bar() {  return 42;\n}\n};")
 885
 886 (js2-deftest-parse parse-harmony-anonymous-class-expression
 887   "var Foo = class {\n  set bar(x) {  bar = x;\n}\n};")
 888
 889 (js2-deftest-parse parse-harmony-class-with-extends
 890   "class Foo extends Bar {\n}")
 891
 892 (js2-deftest-parse parse-harmony-anonymous-class-with-extends
 893   "foo.Foo = class extends Bar {\n  set bar(x) {  bar = x;\n}\n};")
 894
 895 (js2-deftest-parse parse-harmony-class-with-complex-extends
 896   "class Foo extends foo[BAR][2].Baz {\n}")
 897
 898 (js2-deftest-parse parse-harmony-class-missing-extended-class-is-not-ok
 899   "class Foo extends {\n}"
 900   :syntax-error "extends")
 901
 902 (js2-deftest-parse parse-harmony-class-static-method
 903   "class Foo extends Bar {\n  static bar() {  return 42;\n}\n}")
 904
 905 (js2-deftest-parse parse-unterminated-class-is-not-okay
 906   "class Foo {\n  get bar() {  return 42;\n}"
 907   :syntax-error "}")
 908
 909 (js2-deftest-parse parse-super-keyword
 910   "class Foo {\n  constructor() {  super(42);\n}\n  foo() {  super.foo();\n}\n}")
 911
 912 (js2-deftest-parse parse-class-keywordlike-method
 913   "class C {\n  delete() {}\n  if() {}\n}")
 914
 915 (js2-deftest-parse parse-harmony-class-allow-semicolon-element
 916   "class Foo {;}" :reference "class Foo {\n}")
 917
 918 ;;; Scopes
 919
 920 (js2-deftest ast-symbol-table-includes-fn-node "function foo() {}"
 921   (js2-mode)
 922   (let ((entry (js2-scope-get-symbol js2-mode-ast 'foo)))
 923     (should (= (js2-symbol-decl-type entry) js2-FUNCTION))
 924     (should (equal (js2-symbol-name entry) "foo"))
 925     (should (js2-function-node-p (js2-symbol-ast-node entry)))))
 926
 927 (js2-deftest fn-symbol-table-includes-nested-fn "function foo() {
 928   function bar() {}
 929   var x;
 930 }"
 931   (js2-mode)
 932   (let* ((scope (js2-node-at-point (point-min)))
 933          (fn-entry (js2-scope-get-symbol scope 'bar))
 934          (var-entry (js2-scope-get-symbol scope 'x)))
 935     (should (string= (js2-name-node-name (js2-function-node-name scope)) "foo"))
 936     (should (= (js2-symbol-decl-type fn-entry) js2-FUNCTION))
 937     (should (js2-function-node-p (js2-symbol-ast-node fn-entry)))
 938     (should (= (js2-symbol-decl-type var-entry) js2-VAR))
 939     (should (js2-name-node-p (js2-symbol-ast-node var-entry)))))
 940
 941 (defun js2-test-scope-of-nth-variable-satisifies-predicate (variable nth predicate)
 942   (goto-char (point-min))
 943   (dotimes (n (1+ nth)) (search-forward variable))
 944   (forward-char -1)
 945   (let ((scope (js2-node-get-enclosing-scope (js2-node-at-point))))
 946     (should (funcall predicate (js2-get-defining-scope scope variable)))))
 947
 948 (js2-deftest for-node-is-declaration-scope "for (let i = 0; i; ++i) {};"
 949   (js2-mode)
 950   (js2-test-scope-of-nth-variable-satisifies-predicate "i" 0 #'js2-for-node-p))
 951
 952 (js2-deftest const-scope-sloppy-script "{const a;} a;"
 953   (js2-mode)
 954   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-script-node-p)
 955   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'js2-script-node-p))
 956
 957 (js2-deftest const-scope-strict-script "'use strict'; { const a; } a;"
 958   (js2-mode)
 959   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-block-node-p)
 960   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'null))
 961
 962 (js2-deftest const-scope-sloppy-function "function f() { { const a; } a; }"
 963   (js2-mode)
 964   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-function-node-p)
 965   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'js2-function-node-p))
 966
 967 (js2-deftest const-scope-strict-function "function f() { 'use strict'; { const a; } a; }"
 968   (js2-mode)
 969   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-block-node-p)
 970   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'null))
 971
 972 (js2-deftest array-comp-is-result-scope "[x * 2 for (x in y)];"
 973   (js2-mode)
 974   (js2-test-scope-of-nth-variable-satisifies-predicate "x" 0 #'js2-comp-loop-node-p))
 975
 976 (js2-deftest array-comp-has-parent-scope
 977              "var a,b=[for (i of [[1,2]]) for (j of i) j * a];"
 978   (js2-mode)
 979   (search-forward "for")
 980   (forward-char -3)
 981   (let ((node (js2-node-at-point)))
 982     (should (js2-scope-parent-scope node))
 983     (should (js2-get-defining-scope node "j"))))
 984
 985 ;;; Tokenizer
 986
 987 (js2-deftest get-token "(1+1)"
 988   (js2-init-scanner)
 989   (should (eq js2-LP (js2-next-token)))
 990   (should (eq js2-NUMBER (js2-next-token)))
 991   (should (eq js2-ADD (js2-next-token)))
 992   (should (eq js2-NUMBER (js2-next-token)))
 993   (should (eq js2-RP (js2-next-token))))
 994
 995 (js2-deftest unget-token "()"
 996   (js2-init-scanner)
 997   (should (eq js2-LP (js2-next-token)))
 998   (js2-unget-token)
 999   (should (eq js2-LP (js2-next-token)))
1000   (should (eq js2-RP (js2-next-token))))
1001
1002 (js2-deftest get-token-or-eol "x\n++;"
1003   (js2-init-scanner)
1004   (should (eq js2-NAME (js2-next-token)))
1005   (should (eq js2-EOL (js2-peek-token-or-eol)))
1006   (should (eq js2-INC (js2-next-token)))
1007   (should (eq js2-SEMI (js2-peek-token-or-eol))))
1008
1009 (js2-deftest unget-token-over-eol-and-comment "x\n//abc\ny"
1010   (js2-init-scanner)
1011   (should (eq js2-NAME (js2-next-token)))
1012   (should (eq js2-NAME (js2-next-token)))
1013   (should (equal "y" (js2-current-token-string)))
1014   (js2-unget-token)
1015   (should (eq js2-NAME (js2-current-token-type)))
1016   (should (equal "x" (js2-current-token-string))))
1017
1018 (js2-deftest ts-seek "(1+2)"
1019   (js2-init-scanner)
1020   (should (eq js2-LP (js2-next-token)))
1021   (should (eq js2-NUMBER (js2-next-token)))
1022   (js2-unget-token)
1023   (let ((state (make-js2-ts-state)))
1024     (should (eq js2-NUMBER (js2-next-token)))
1025     (should (eq js2-ADD (js2-next-token)))
1026     (js2-ts-seek state)
1027     (should (eq 1 js2-ti-lookahead))
1028     (should (eq js2-NUMBER (js2-next-token)))
1029     (should (eq 1 (js2-token-number
1030                    (js2-current-token))))))
1031
1032 (js2-deftest get-token-template-literal "`abc ${i} z ${j} def`"
1033   (js2-init-scanner)
1034   (should (eq js2-TEMPLATE_HEAD (js2-next-token)))
1035   (should (equal "abc " (js2-current-token-string)))
1036   (should (eq js2-NAME (js2-next-token)))
1037   (should (eq js2-RC (js2-next-token)))
1038   (should (eq js2-TEMPLATE_HEAD (js2-next-token 'TEMPLATE_TAIL)))
1039   (should (equal " z " (js2-current-token-string)))
1040   (should (eq js2-NAME (js2-next-token)))
1041   (should (eq js2-RC (js2-next-token)))
1042   (should (eq js2-NO_SUBS_TEMPLATE (js2-next-token 'TEMPLATE_TAIL)))
1043   (should (equal " def" (js2-current-token-string))))
1044
1045 ;;; Error handling
1046
1047 (js2-deftest for-node-with-error-len "for "
1048   (js2-mode)
1049   (let ((node (js2-node-at-point (point-min))))
1050     (should (= (js2-node-len (js2-node-parent node)) 4))))
1051
1052 (js2-deftest function-without-parens-error "function b {}"
1053   ;; Should finish the parse.
1054   (js2-mode))
1055
1056 ;;; Comments
1057
1058 (js2-deftest comment-node-length "//"
1059   (js2-mode)
1060   (let ((node (js2-node-at-point (point-min))))
1061     (should (= (js2-node-len node) 2))))
1062
1063 (js2-deftest comment-node-length-newline "//\n"
1064   (js2-mode)
1065   (let ((node (js2-node-at-point (point-min))))
1066     (should (= (js2-node-len node) 3))))
1067
1068 ;;; Variables classification
1069
1070 (defun js2--variables-summary (vars)
1071   (let (r)
1072     (setq vars (let (aslist)
1073                  (maphash (lambda (k v) (push (cons k v) aslist)) vars)
1074                  aslist))
1075     (dolist (v (sort vars (lambda (a b) (< (js2-node-abs-pos (js2-symbol-ast-node (car a)))
1076                                       (js2-node-abs-pos (js2-symbol-ast-node (car b)))))))
1077       (let* ((symbol (car v))
1078              (inition (cadr v))
1079              (uses (cddr v))
1080              (symn (js2-symbol-ast-node symbol))
1081              (namen (js2--get-name-node symn)))
1082         (push (format "%s@%s:%s"
1083                       (js2-symbol-name symbol)
1084                       (js2-node-abs-pos namen)
1085                       (if (eq inition ?P)
1086                           "P"
1087                         (if uses
1088                             (if inition "I" "N")
1089                           "U"))) r)
1090         (dolist (u (sort (cddr v) (lambda (a b) (< (js2-node-abs-pos a)
1091                                               (js2-node-abs-pos b)))))
1092           (push (js2-node-abs-pos u) r))))
1093     (reverse r)))
1094
1095 (defmacro js2-deftest-classify-variables (name buffer-contents summary)
1096  (declare (indent defun))
1097   `(ert-deftest ,(intern (format "js2-classify-variables-%s" name)) ()
1098      (with-temp-buffer
1099        (save-excursion
1100          (insert ,buffer-contents))
1101        (unwind-protect
1102            (progn
1103              (js2-mode)
1104              (should (equal ,summary (js2--variables-summary
1105                                       (js2--classify-variables)))))
1106          (fundamental-mode)))))
1107
1108 (js2-deftest-classify-variables incomplete-var-statement
1109   "var"
1110   '())
1111
1112 (js2-deftest-classify-variables unused-variable
1113   "function foo () { var x; return 42; }"
1114   '("foo@10:U" "x@23:U"))
1115
1116 (js2-deftest-classify-variables unused-variable-declared-twice
1117   "function foo (a) { var x; function bar () { var x; x=42; }; return a;}"
1118   '("foo@10:U" "a@15:P" 68 "x@24:U" "bar@36:U" "x@49:U"))
1119
1120 (js2-deftest-classify-variables assigned-variable
1121   "function foo () { var x; x=42; return x; }"
1122   '("foo@10:U" "x@23:I" 39))
1123
1124 (js2-deftest-classify-variables assignment-in-nested-function
1125   "function foo () { var x; function bar () { x=42; }; }"
1126   '("foo@10:U" "x@23:U" "bar@35:U"))
1127
1128 (js2-deftest-classify-variables unused-nested-function
1129   "function foo() { var i, j=1; function bar() { var x, y=42, z=i; return y; } return i; }"
1130   '("foo@10:U" "i@22:N" 62 84 "j@25:U" "bar@39:U" "x@51:U" "y@54:I" 72 "z@60:U"))
1131
1132 (js2-deftest-classify-variables prop-get-initialized
1133   "function foo () { var x, y={}; y.a=x; }"
1134   '("foo@10:U" "x@23:N" 36 "y@26:I" 32))
1135
1136 (js2-deftest-classify-variables prop-get-uninitialized
1137   "function foo () { var x; if(x.foo) alert('boom'); }"
1138   '("foo@10:U" "x@23:N" 29))
1139
1140 (js2-deftest-classify-variables prop-get-function-assignment
1141   "(function(w) { w.f = function() { var a=42, m; return a; }; })(window);"
1142   '("w@11:P" 11 16 "a@39:I" 55 "m@45:U"))
1143
1144 (js2-deftest-classify-variables let-declaration
1145   "function foo () { let x,y=1; return x; }"
1146   '("foo@10:U" "x@23:N" 37 "y@25:U"))
1147
1148 (js2-deftest-classify-variables external-function-call
1149   "function foo (m) { console.log(m, arguments); }"
1150   '("foo@10:U" "m@15:P" 32))
1151
1152 (js2-deftest-classify-variables global-function-call
1153   "function bar () { return 42; } function foo (a) { return bar(); }"
1154   '("bar@10:I" 58 "foo@41:U" "a@46:P"))
1155
1156 (js2-deftest-classify-variables let-declaration-for-scope
1157   "function foo () { for(let x=1,y; x<y; y++) {} }"
1158   '("foo@10:U" "x@27:I" 34 "y@31:N" 36 39))
1159
1160 (js2-deftest-classify-variables arguments-implicit-var
1161   "function foo () { var p; for(p in arguments) { return p; } }"
1162   '("foo@10:U" "p@23:I" 55))
1163
1164 (js2-deftest-classify-variables catch-error-variable
1165   "function foo () { try { throw 'Foo'; } catch (e) { console.log(e); }"
1166   '("foo@10:U" "e@47:I" 64))
1167
1168 (js2-deftest-classify-variables prop-get-assignment
1169   "function foo () { var x={y:{z:{}}}; x.y.z=42; }"
1170   '("foo@10:U" "x@23:I" 37))
1171
1172 (js2-deftest-classify-variables unused-function-argument
1173   "function foo (a) { return 42; }"
1174   '("foo@10:U" "a@15:P"))
1175
1176 (js2-deftest-classify-variables used-function-argument
1177   "function foo (a) { a=42; return a; }"
1178   '("foo@10:U" "a@15:P" 33))
1179
1180 (js2-deftest-classify-variables prop-get
1181   "function foo (a) { a=navigator.x||navigator.y; return a; }"
1182   '("foo@10:U" "a@15:P" 55))
1183
1184 (js2-deftest-classify-variables for-in-loop
1185   "function foo () { var d={}; for(var k in d) {var v=d[k]; } }"
1186   '("foo@10:U" "d@23:I" 42 52 "k@37:I" 54 "v@50:U"))
1187
1188 (js2-deftest-classify-variables array-comprehension-legacy
1189   "function foo() { var j,a=[for (i of [1,2,3]) i*j]; }"
1190   '("foo@10:U" "j@22:N" 48 "a@24:U" "i@32:I" 46))
1191
1192 (js2-deftest-classify-variables array-comprehension
1193   "function foo() { var j,a=[[i,j] for (i of [1,2,3])]; }"
1194   '("foo@10:U" "j@22:N" 30 "a@24:U" "i@38:I" 28))
1195
1196 (js2-deftest-classify-variables return-named-function
1197   "function foo() { var a=42; return function bar() { return a; } }"
1198   '("foo@10:U" "a@22:I" 59 "bar@44:I" 44))
1199
1200 (js2-deftest-classify-variables named-wrapper-function
1201   "function foo() { var a; (function bar() { a=42; })(); return a; }"
1202   '("foo@10:U" "a@22:I" 62 "bar@35:I" 35))