code.delx.au - gnu-emacs-elpa/blob - packages/js2-mode/tests/parser.el

   1 ;;; tests/parser.el --- Some tests for js2-mode.
   2
   3 ;; Copyright (C) 2009, 2011-2016  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-mode--and-parse ()
  39   (js2-mode)
  40   (js2-reparse))
  41
  42 (defun js2-test-string-to-ast (s)
  43   (insert s)
  44   (js2-mode--and-parse)
  45   (should (null js2-mode-buffer-dirty-p))
  46   js2-mode-ast)
  47
  48 (cl-defun js2-test-parse-string (code-string &key syntax-error errors-count
  49                                              reference warnings-count)
  50   (ert-with-test-buffer (:name 'origin)
  51     (let ((ast (js2-test-string-to-ast code-string)))
  52       (if syntax-error
  53           (let ((errors (js2-ast-root-errors ast)))
  54             (should (= (or errors-count 1) (length errors)))
  55             (cl-destructuring-bind (_ pos len) (car (last errors))
  56               (should (string= syntax-error (substring code-string
  57                                                        (1- pos) (+ pos len -1))))))
  58         (should (= 0 (length (js2-ast-root-errors ast))))
  59         (ert-with-test-buffer (:name 'copy)
  60           (js2-print-tree ast)
  61           (skip-chars-backward " \t\n")
  62           (should (string= (or reference code-string)
  63                            (buffer-substring-no-properties
  64                             (point-min) (point)))))
  65         (when warnings-count
  66           (should (= warnings-count
  67                      (length (js2-ast-root-warnings ast)))))))))
  68
  69 (cl-defmacro js2-deftest-parse (name code-string &key bind syntax-error errors-count
  70                                      reference warnings-count)
  71   "Parse CODE-STRING.  If SYNTAX-ERROR is nil, print syntax tree
  72 with `js2-print-tree' and assert the result to be equal to
  73 REFERENCE, if present, or the original string.  If SYNTAX-ERROR
  74 is passed, expect syntax error highlighting substring equal to
  75 SYNTAX-ERROR value.  BIND defines bindings to apply them around
  76 the test."
  77   (declare (indent defun))
  78   `(ert-deftest ,(intern (format "js2-%s" name)) ()
  79      (let ,(append bind '((js2-basic-offset 2)))
  80        (js2-test-parse-string ,code-string
  81                               :syntax-error ,syntax-error
  82                               :errors-count ,errors-count
  83                               :warnings-count ,warnings-count
  84                               :reference ,reference))))
  85
  86 ;;; Basics
  87
  88 (js2-deftest-parse variable-assignment
  89   "a = 1;")
  90
  91 (js2-deftest-parse empty-object-literal
  92   "b = {};")
  93
  94 (js2-deftest-parse empty-array-literal
  95   "c = [];")
  96
  97 (js2-deftest-parse array-with-missing-elements
  98   "var a = [1, 2, ,];")
  99
 100 (js2-deftest-parse comma-after-regexp
 101   "d = /eee/, 42;")
 102
 103 (js2-deftest-parse return-statement
 104   "function foo() {\n  return 2;\n}")
 105
 106 (js2-deftest-parse function-statement
 107   "function foo() {\n}")
 108
 109 (js2-deftest-parse function-statement-inside-block
 110   "if (true) {\n  function foo() {\n  }\n}")
 111
 112 (js2-deftest-parse function-expression-statements-are-verboten
 113   "function() {}" :syntax-error "(")
 114
 115 (js2-deftest-parse member-expr-as-function-name
 116   "function a.b.c[2](x, y) {\n}"
 117   :bind ((js2-allow-member-expr-as-function-name t)))
 118
 119 (js2-deftest-parse named-function-expression
 120   "a = function b() {};")
 121
 122 (js2-deftest-parse parenthesized-expression
 123   "(1 + 2);")
 124
 125 (js2-deftest-parse for-with-in-operator-in-parens
 126   "for (var y = (0 in []) in {}) {\n}")
 127
 128 (js2-deftest-parse for-with-in-operator-in-cond
 129   "for (var y = 1 ? 0 in [] : false in {}) {\n}")
 130
 131 (js2-deftest-parse let-expression
 132   "(let (x = 42) x);")
 133
 134 (js2-deftest-parse let-expression-statement
 135   "let (x = 42) x;")
 136
 137 (js2-deftest-parse void
 138   "void 0;")
 139
 140 ;;; Callers of `js2-valid-prop-name-token'
 141
 142 (js2-deftest-parse parse-property-access-when-not-keyword
 143   "A.foo = 3;")
 144
 145 (js2-deftest-parse parse-property-access-when-keyword
 146   "A.in = 3;"
 147   :bind ((js2-allow-keywords-as-property-names t)))
 148
 149 (js2-deftest-parse parse-property-access-when-keyword-no-xml
 150   "A.in = 3;"
 151   :bind ((js2-allow-keywords-as-property-names t)
 152          (js2-compiler-xml-available nil)))
 153
 154 (js2-deftest-parse parse-object-literal-when-not-keyword
 155   "a = {b: 1};")
 156
 157 (js2-deftest-parse parse-object-literal-when-keyword
 158   "a = {in: 1};"
 159   :bind ((js2-allow-keywords-as-property-names t)))
 160
 161 ;;; 'of' contextual keyword
 162
 163 (js2-deftest-parse parse-legacy-array-comp-loop-with-of
 164   "[a for (a of [])];")
 165
 166 (js2-deftest-parse parse-array-comp-loop
 167   "[for (a of []) a];")
 168
 169 (js2-deftest-parse parse-for-of
 170   "for (var a of []) {\n}")
 171
 172 (js2-deftest-parse of-can-be-name
 173   "void of;")
 174
 175 (js2-deftest-parse of-can-be-object-name
 176   "of.z;")
 177
 178 (js2-deftest-parse of-can-be-var-name
 179   "var of = 3;")
 180
 181 (js2-deftest-parse of-can-be-function-name
 182   "function of() {\n}")
 183
 184 ;;; Destructuring binding
 185
 186 (js2-deftest-parse destruct-in-declaration
 187   "var {a, b} = {a: 1, b: 2};"
 188   :warnings-count 0)
 189
 190 (js2-deftest-parse destruct-in-arguments
 191   "function f({a: aa, b: bb}) {\n}"
 192   :warnings-count 0)
 193
 194 (js2-deftest-parse destruct-in-array-comp-loop
 195   "[a + b for ([a, b] in [[0, 1], [1, 2]])];")
 196
 197 (js2-deftest-parse destruct-in-catch-clause
 198   "try {\n} catch ({a, b}) {\n  a + b;\n}"
 199   :warnings-count 0)
 200
 201 (js2-deftest-parse destruct-with-initializer-in-object
 202   "var {a, b = 2, c} = {};\nb;"
 203   :warnings-count 0)
 204
 205 (js2-deftest-parse destruct-with-initializer-in-array
 206   "var [a, b = 2, c] = [];\nb;"
 207   :warnings-count 0)
 208
 209 (js2-deftest-parse destruct-non-name-target-is-error
 210   "var {1=1} = {};" :syntax-error "1" :errors-count 1)
 211
 212 (js2-deftest-parse destruct-with-initializer-in-function-params
 213   "function f({a, b = 1, c}, [d, e = 1, f]) {\n}")
 214
 215 (js2-deftest-parse destruct-with-default-in-function-params
 216   "function f({x = 1, y = 2} = {}, [x, y] = [1, 2]) {\n}")
 217
 218 (js2-deftest-parse destruct-name-conflict-is-error-in-object
 219   "\"use strict\";\nvar {a=1,a=2} = {};" :syntax-error "a" :errors-count 1)
 220
 221 (js2-deftest destruct-name-conflict-is-warning-in-array "\"use strict\";\nvar [a=1,a=2] = [];"
 222   (js2-mode--and-parse)
 223   (should (equal '("msg.var.redecl" "a")
 224                  (caar js2-parsed-warnings))))
 225
 226 (js2-deftest initializer-outside-destruct-is-error "({a=1});"
 227   (js2-mode--and-parse)
 228   (should (equal "msg.init.no.destruct"
 229                  (car (caar js2-parsed-errors)))))
 230
 231 ;;; Object literals
 232
 233 (js2-deftest-parse object-literal-shorthand
 234   "var x = {a: 1, b, c: 1, d};")
 235
 236 (js2-deftest-parse object-literal-shorthard-with-number
 237   "var a = {1};" :syntax-error "}" :errors-count 2)
 238
 239 (js2-deftest-parse object-literal-method
 240   "var x = {f(y) {  return y;\n}};")
 241
 242 (js2-deftest object-literal-method-own-name-in-scope "({f(){f();}});"
 243   (js2-mode--and-parse)
 244   (should (equal '("msg.undeclared.variable" "f")
 245                  (caar js2-parsed-warnings))))
 246
 247 (js2-deftest-parse object-literal-getter-method
 248   "var x = {get f() {  return 42;\n}};")
 249
 250 (js2-deftest-parse object-literal-setter-method
 251   "var x = {set f(y) {  x = y;\n}};")
 252
 253 (js2-deftest-parse object-literal-computed-keys
 254   "var x = {[Symbol.iterator]: function() {}};")
 255
 256 (js2-deftest-parse object-literal-computed-function-keys
 257   "var x = {[foo + bar](y) {  return y;\n}};")
 258
 259 (js2-deftest-parse object-literal-computed-getter-key
 260   "var x = {get [foo + bar]() {  return 42;\n}};")
 261
 262 (js2-deftest-parse object-literal-generator
 263   "var x = {*foo() {  yield* 42;\n}};")
 264
 265 (js2-deftest-parse object-literal-computed-generator-key
 266   "var x = {*[foo + bar]() {  yield 42;\n}};")
 267
 268 ;;; Function definition
 269
 270 (js2-deftest function-redeclaring-var "var gen = 3; function gen() {};"
 271   (js2-mode--and-parse)
 272   (should (= (length (js2-ast-root-warnings js2-mode-ast)) 1)))
 273
 274 (js2-deftest function-expression-var-same-name "var gen = function gen() {};"
 275   (js2-mode--and-parse)
 276   (should (null (js2-ast-root-warnings js2-mode-ast))))
 277
 278 ;;; Function parameters
 279
 280 (js2-deftest-parse function-with-default-parameters
 281   "function foo(a = 1, b = a + 1) {\n}")
 282
 283 (js2-deftest-parse function-with-no-default-after-default
 284   "function foo(a = 1, b) {\n}")
 285
 286 (js2-deftest-parse function-with-destruct-after-default
 287   "function foo(a = 1, {b, c}) {\n}")
 288
 289 (js2-deftest-parse function-with-rest-parameter
 290   "function foo(a, b, ...rest) {\n}")
 291
 292 (js2-deftest-parse function-with-param-after-rest-parameter
 293   "function foo(a, ...b, rest) {\n}"
 294   :syntax-error "rest")
 295
 296 (js2-deftest-parse function-with-destruct-after-rest-parameter
 297   "function foo(a, ...b, {}) {\n}"
 298   :syntax-error "{}")
 299
 300 (js2-deftest-parse function-with-rest-after-default-parameter
 301   "function foo(a = 1, ...rest) {\n}")
 302
 303 ;;; Strict mode errors
 304
 305 (js2-deftest-parse function-bad-strict-parameters
 306   "'use strict';\nfunction foo(eval, {arguments}, bar) {\n}"
 307   :syntax-error "eval" :errors-count 2)
 308
 309 (js2-deftest-parse function-retroactive-bad-strict-parameters
 310   "function foo(arguments) {'use strict';}"
 311   :syntax-error "arguments" :errors-count 1)
 312
 313 (js2-deftest-parse function-duplicate-strict-parameters
 314   "'use strict';\nfunction foo(a, a) {\n}"
 315   :syntax-error "a" :errors-count 1)
 316
 317 (js2-deftest-parse function-bad-strict-function-name
 318   "'use strict';\nfunction eval() {\n}"
 319   :syntax-error "eval" :errors-count 1)
 320
 321 (js2-deftest-parse function-bad-retroactive-strict-function-name
 322   "function arguments() {'use strict';}"
 323   :syntax-error "arguments" :errors-count 1)
 324
 325 (js2-deftest-parse function-bad-strict-catch-name
 326   "'use strict';\ntry {} catch (eval) {}"
 327   :syntax-error "eval" :errors-count 1)
 328
 329 (js2-deftest-parse function-bad-strict-variable-name
 330   "'use strict';\nvar eval = 'kekeke';"
 331   :syntax-error "eval" :errors-count 1)
 332
 333 (js2-deftest-parse function-bad-strict-assignment
 334   "'use strict';\narguments = 'fufufu';"
 335   :syntax-error "arguments" :errors-count 1)
 336
 337 (js2-deftest-parse function-property-strict-assignment
 338   "'use strict';\narguments.okay = 'alright';")
 339
 340 (js2-deftest-parse function-strict-with
 341   "'use strict';\nwith ({}) {}"
 342   :syntax-error "with" :errors-count 1)
 343
 344 (js2-deftest-parse function-strict-octal
 345   "'use strict';\nvar number = 0644;"
 346   :syntax-error "0644" :errors-count 1)
 347
 348 (js2-deftest-parse function-strict-octal-allow-0o
 349   "'use strict';\n0o644;" :reference "'use strict';\n420;")
 350
 351 (js2-deftest-parse function-strict-duplicate-keys
 352   "'use strict';\nvar object = {a: 1, a: 2, 'a': 3, ['a']: 4, 1: 5, '1': 6, [1 + 1]: 7};"
 353   :syntax-error "a" :errors-count 4) ; "a" has 3 dupes, "1" has 1 dupe.
 354
 355 (js2-deftest-parse function-strict-duplicate-getter
 356   "'use strict';\nvar a = {get x() {}, get x() {}};"
 357   :syntax-error "x" :errors-count 1)
 358
 359 (js2-deftest-parse function-strict-duplicate-setter
 360   "'use strict';\nvar a = {set x() {}, set x() {}};"
 361   :syntax-error "x" :errors-count 1)
 362
 363 ;;; Lack of errors in strict mode
 364
 365 (js2-deftest-parse function-strict-const-scope
 366   "'use strict';\nconst a;\nif (1) {\n  const a;\n}")
 367
 368 (js2-deftest-parse function-strict-no-getter-setter-duplicate
 369   "'use strict';\nvar a = {get x() {}, set x() {}};")
 370
 371 ;;; Spread operator
 372
 373 (js2-deftest-parse spread-in-array-literal
 374   "[1, ...[2, 3], 4, ...[5, 6]];")
 375
 376 (js2-deftest-parse spread-in-function-call
 377   "f(3, ...[t(2), t(3)], 42, ...[t(4)]);")
 378
 379 (js2-deftest-parse rest-in-array-destructure
 380   "let [x, y, z, ...w] = [1, ...a, ...b, c];")
 381
 382 (js2-deftest-parse comma-after-rest-in-array
 383   "let [...x,] = [1, 2, 3];"
 384   :syntax-error "," :errors-count 1)
 385
 386 (js2-deftest-parse elem-after-rest-in-array
 387   "let [...x, y] = [1, 2, 3];"
 388   :syntax-error "," :errors-count 2)
 389
 390 (js2-deftest-parse array-destructure-expr-default
 391   "let [[x] = [3]] = y;")
 392
 393 (js2-deftest-parse spread-in-object-literal
 394   "f({x, y, ...z});")
 395
 396 (js2-deftest-parse rest-in-object-literal
 397   "const {x, y, ...z} = f();")
 398
 399 ;;; Arrow functions
 400
 401 (js2-deftest-parse arrow-function-with-empty-args-and-no-curlies
 402   "() => false;" :reference "() => {false};")
 403
 404 (js2-deftest-parse arrow-function-with-args-and-curlies
 405   "(a, b = 1, ...c) => {  c;\n};")
 406
 407 (js2-deftest-parse arrow-function-with-destructuring
 408   "([{a}, b]) => {  a + b;\n};")
 409
 410 (js2-deftest-parse parenless-arrow-function-prohibits-rest
 411   "...b => {b + 1;};" :syntax-error "=>")
 412
 413 (js2-deftest-parse parenless-arrow-function-prohibits-destructuring
 414   "[a, b] => {a + b;};" :syntax-error "]" :errors-count 4)
 415
 416 (js2-deftest-parse arrow-function-recovers-from-error
 417   "[(,foo) => 1];" :syntax-error "," :errors-count 6)
 418
 419 ;;; Automatic semicolon insertion
 420
 421 (js2-deftest-parse no-auto-semi-insertion-after-if
 422   "if (true) {\n}")
 423
 424 (js2-deftest-parse auto-semi-insertion-after-function
 425   "a = function() {}" :reference "a = function() {};")
 426
 427 (js2-deftest-parse auto-semi-one-variable-per-line
 428   "x\ny" :reference "x;\ny;")
 429
 430 ;;; Labels
 431
 432 (js2-deftest-parse labeled-stmt-node
 433   "foo:\nbar:\nx = y + 1;")
 434
 435 (js2-deftest no-label-node-inside-expr "x = y:"
 436   (let (js2-parse-interruptable-p)
 437     (js2-mode--and-parse))
 438   (let ((assignment (js2-expr-stmt-node-expr (car (js2-scope-kids js2-mode-ast)))))
 439     (should (js2-name-node-p (js2-assign-node-right assignment)))))
 440
 441 (js2-deftest-parse label-and-loops "for (; ; ) {
 442   loop:
 443   for (; ; ) {
 444     continue loop;
 445   }
 446 }")
 447
 448 ;;; Generators
 449
 450 (js2-deftest-parse legacy-generator "function foo() {\n  yield 1;\n}")
 451
 452 (js2-deftest-parse legacy-generator-cannot-return
 453   "function foo() {\n  yield 1;\n return 2;\n}" :syntax-error "return 2")
 454
 455 (js2-deftest-parse harmony-generator "function* bar() {\n  yield 2;\n  return 3;\n}")
 456
 457 (js2-deftest-parse harmony-generator-yield-star "(function*(a) {  yield* a;\n});")
 458
 459 ;;; Comprehensions
 460
 461 (js2-deftest-parse parse-legacy-array-comp-loop-with-filter
 462   "[a for (a in b) if (a == 2)];")
 463
 464 (js2-deftest-parse parse-array-comp-loop-with-filters
 465   "[for (a in b) if (a == 2) if (b != 10) a];")
 466
 467 (js2-deftest-parse parse-generator-comp-loop-with-filters
 468   "(for (x of y) if (x != 4) x);")
 469
 470 (js2-deftest-parse parse-array-comp-with-yield-is-ok
 471   "(function() {  return [for (x of []) yield x];\n});")
 472
 473 (js2-deftest-parse parse-generator-comp-with-yield-is-not-ok
 474   "(function() {  return (for (x of []) yield x);\n});"
 475   :syntax-error "yield")
 476
 477 (js2-deftest-parse parse-generator-comp-with-yield-inside-function-is-ok
 478   "(for (x of []) function*() {  yield x;\n});")
 479
 480 ;;; Async
 481
 482 (js2-deftest-parse async-function-statement
 483   "async function foo() {\n}")
 484
 485 (js2-deftest-parse async-function-statement-inside-block
 486   "if (true) {\n  async function foo() {\n  }\n}")
 487
 488 (js2-deftest-parse async-function-expression-statements-are-verboten
 489   "async function() {}" :syntax-error "(")
 490
 491 (js2-deftest-parse async-named-function-expression
 492   "a = async function b() {};")
 493
 494 (js2-deftest-parse async-arrow-function-expression
 495   "a = async (b) => {  b;\n};")
 496
 497 (js2-deftest-parse async-method-in-object-literal
 498   "({async f() {}});")
 499
 500 (js2-deftest-parse async-method-in-class-body
 501   "class C {\n  async foo() {}\n}")
 502
 503 (js2-deftest-parse static-async-method-in-class-body
 504   "class C {\n  static async foo() {}\n}")
 505
 506 (js2-deftest-parse async-method-allow-await
 507   "({async f() {  await x;\n}});")
 508
 509 ;;; Await
 510
 511 (js2-deftest-parse await-is-ok "async function foo() {\n  await bar();\n}")
 512
 513 (js2-deftest-parse await-inside-assignment-is-ok
 514                    "async function foo() {\n  var result = await bar();\n}")
 515
 516 (js2-deftest-parse await-inside-array-is-ok
 517                    "async function foo() {\n  var results = [await bar(), await baz()];\n}")
 518
 519 (js2-deftest-parse await-inside-non-async-function-is-not-ok
 520                    "function foo() {\n  await bar();\n}"
 521                    :syntax-error "await")
 522
 523 (js2-deftest-parse await-inside-non-async-arrow-function-is-not-ok
 524                    "a = () => {  await bar();\n}"
 525                    :syntax-error "await")
 526
 527 ;;; 'async' and 'await' are contextual keywords
 528
 529 (js2-deftest-parse async-can-be-name
 530   "void async;")
 531
 532 (js2-deftest-parse async-can-be-object-name
 533   "async.z;")
 534
 535 (js2-deftest-parse async-can-be-var-name
 536   "var async = 3;")
 537
 538 (js2-deftest-parse async-can-be-function-name
 539   "function async() {\n}")
 540
 541 (js2-deftest-parse await-can-be-name
 542   "void await;")
 543
 544 (js2-deftest-parse await-can-be-object-name
 545   "await.z;")
 546
 547 (js2-deftest-parse await-can-be-var-name
 548   "var await = 3;")
 549
 550 (js2-deftest-parse await-can-be-function-name
 551   "function await() {\n}")
 552
 553 ;;; Numbers
 554
 555 (js2-deftest-parse decimal-starting-with-zero "081;" :reference "81;")
 556
 557 (js2-deftest-parse huge-hex "0x0123456789abcdefABCDEF;" :reference "-1;")
 558
 559 (js2-deftest-parse octal-without-o "071;" :reference "57;")
 560
 561 (js2-deftest-parse hex-number-okay "0x123;" :reference "291;")
 562
 563 (js2-deftest-parse hex-number-broken "0xz23;"
 564   :syntax-error "0xz" :errors-count 2)
 565
 566 (js2-deftest-parse binary-number-okay "0b101;" :reference "5;")
 567
 568 (js2-deftest-parse binary-number-broken "0b210;"
 569   :syntax-error "0b2" :errors-count 2)
 570
 571 (js2-deftest-parse octal-number-okay "0o765;" :reference "501;")
 572
 573 (js2-deftest-parse octal-number-broken "0o812;"
 574   :syntax-error "0o8" :errors-count 2)
 575
 576 ;;; Modules
 577
 578 (js2-deftest parse-export-bindings "{one, two as dos}"
 579   (js2-init-scanner)
 580   (should (js2-match-token js2-LC))
 581   (let ((imports (js2-parse-export-bindings)))
 582     (should (not (equal nil imports)))
 583     (should (= 2 (length imports)))
 584     (let ((first (nth 0 imports))
 585           (second (nth 1 imports)))
 586       (should (equal "one" (js2-name-node-name (js2-export-binding-node-extern-name first))))
 587       (should (equal "two" (js2-name-node-name (js2-export-binding-node-extern-name second))))
 588       (let ((first-name (js2-export-binding-node-local-name first))
 589             (second-name (js2-export-binding-node-local-name second)))
 590         (should (equal first (js2-node-parent first-name)))
 591         (should (equal 3 (js2-node-len first-name)))
 592         (should (equal "one" (js2-name-node-name first-name)))
 593         (should (equal second (js2-node-parent second-name)))
 594         (should (equal 3 (js2-node-len second-name)))
 595         (should (equal "dos" (js2-name-node-name second-name)))))))
 596
 597 (js2-deftest parse-export-binding-as-default "one as default"
 598   (js2-init-scanner)
 599   (let ((binding (js2-maybe-parse-export-binding)))
 600     (should binding)
 601     (should (js2-export-binding-node-p binding))
 602     (let ((name (js2-export-binding-node-local-name binding)))
 603       (should name)
 604       (should (equal "default" (js2-name-node-name name))))))
 605
 606 (js2-deftest parse-namepsace-import "* as lib;"
 607   (js2-init-scanner)
 608   (should (js2-match-token js2-MUL))
 609   (let ((namespace-import (js2-parse-namespace-import)))
 610     (should (not (equal nil namespace-import)))
 611     (should (js2-namespace-import-node-p namespace-import))
 612     (should (= 1 (js2-node-pos namespace-import)))
 613     (should (equal 8 (js2-node-len namespace-import)))
 614     (let ((name-node (js2-namespace-import-node-name namespace-import)))
 615       (should (equal "lib" (js2-name-node-name name-node)))
 616       (should (= 5 (js2-node-pos name-node))))))
 617
 618 (js2-deftest parse-from-clause "from 'foo/bar';"
 619   (js2-init-scanner)
 620   (let ((from (js2-parse-from-clause)))
 621     (should (not (equal nil from)))
 622     (should (= 1 (js2-node-pos from)))
 623     (should (= 14 (js2-node-len from)))
 624     (should (equal "foo/bar" (js2-from-clause-node-module-id from)))))
 625
 626 (js2-deftest parse-import-module-id-only "import 'src/lib'"
 627   (js2-init-scanner)
 628   (should (js2-match-token js2-IMPORT))
 629   (let ((import (js2-parse-import)))
 630     (should (not (equal nil import)))
 631     (should (= 1 (js2-node-pos import)))
 632     (should (= 16 (js2-node-len import)))
 633     (should (equal nil (js2-import-node-import import)))
 634     (should (equal nil (js2-import-node-from import)))))
 635
 636 (js2-deftest parse-imported-default-binding "import theDefault from 'src/lib'"
 637   (js2-push-scope (make-js2-scope :pos 0))
 638   (js2-init-scanner)
 639   (should (js2-match-token js2-IMPORT))
 640   (let ((import-node (js2-parse-import)))
 641     (should (not (equal nil import-node)))
 642     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 643     (let ((import (js2-import-node-import import-node)))
 644       (should (not (equal nil import)))
 645       (should (equal nil (js2-import-clause-node-namespace-import import)))
 646       (should (equal nil (js2-import-clause-node-named-imports import)))
 647       (let ((default (js2-import-clause-node-default-binding import)))
 648         (should (not (equal nil default)))
 649         (should (js2-export-binding-node-p default))
 650         (should (equal "theDefault" (js2-name-node-name (js2-export-binding-node-extern-name default)))))))
 651   (should (js2-scope-get-symbol js2-current-scope "theDefault")))
 652
 653 (js2-deftest parse-import-namespace-binding "import * as lib from 'src/lib'"
 654   (js2-push-scope (make-js2-scope :pos 0))
 655   (js2-init-scanner)
 656   (should (js2-match-token js2-IMPORT))
 657   (let ((import-node (js2-parse-import)))
 658     (should (not (equal nil import-node)))
 659     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 660     (let ((import (js2-import-node-import import-node)))
 661       (should (not (equal nil import)))
 662       (should (equal nil (js2-import-clause-node-default-binding import)))
 663       (should (equal nil (js2-import-clause-node-named-imports import)))
 664       (let ((ns-import (js2-import-clause-node-namespace-import import)))
 665         (should (not (equal nil ns-import)))
 666         (should (js2-namespace-import-node-p ns-import))
 667         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 668   (should (js2-scope-get-symbol js2-current-scope "lib")))
 669
 670 (js2-deftest parse-import-named-imports "import {foo as bar, baz} from 'src/lib'"
 671   (js2-push-scope (make-js2-scope :pos 0))
 672   (js2-init-scanner)
 673   (should (js2-match-token js2-IMPORT))
 674   (let ((import-node (js2-parse-import)))
 675     (should (not (equal nil import-node)))
 676     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 677     (let ((import (js2-import-node-import import-node)))
 678       (should (not (equal nil import)))
 679       (should (equal nil (js2-import-clause-node-default-binding import)))
 680       (should (equal nil (js2-import-clause-node-namespace-import import)))
 681       (let ((named-imports (js2-import-clause-node-named-imports import)))
 682         (should (not (equal nil named-imports)))
 683         (should (listp named-imports))
 684         (should (= 2 (length named-imports)))
 685         (let ((first (nth 0 named-imports))
 686               (second (nth 1 named-imports)))
 687           (should (equal "bar" (js2-name-node-name (js2-export-binding-node-local-name first))))
 688           (should (equal "baz" (js2-name-node-name (js2-export-binding-node-local-name second))))))))
 689   (should (js2-scope-get-symbol js2-current-scope "bar"))
 690   (should (js2-scope-get-symbol js2-current-scope "baz")))
 691
 692 (js2-deftest parse-import-default-and-namespace "import stuff, * as lib from 'src/lib'"
 693   (js2-push-scope (make-js2-scope :pos 0))
 694   (js2-init-scanner)
 695   (should (js2-match-token js2-IMPORT))
 696   (let ((import-node (js2-parse-import)))
 697     (should (not (equal nil import-node)))
 698     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 699     (let ((import (js2-import-node-import import-node)))
 700       (should (not (equal nil import)))
 701       (should (equal nil (js2-import-clause-node-named-imports import)))
 702       (let ((default (js2-import-clause-node-default-binding import))
 703             (ns-import (js2-import-clause-node-namespace-import import)))
 704         (should (not (equal nil default)))
 705         (should (equal "stuff" (js2-name-node-name (js2-export-binding-node-local-name default))))
 706         (should (not (equal nil ns-import)))
 707         (should (js2-namespace-import-node-p ns-import))
 708         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 709   (should (js2-scope-get-symbol js2-current-scope "stuff"))
 710   (should (js2-scope-get-symbol js2-current-scope "lib")))
 711
 712 (js2-deftest parse-import-default-and-named-imports
 713   "import robert as bob, {cookies, pi as PIE} from 'src/lib'"
 714   (js2-push-scope (make-js2-scope :pos 0))
 715   (js2-init-scanner)
 716   (should (js2-match-token js2-IMPORT))
 717   (let ((import-node (js2-parse-import)))
 718     (should (not (equal nil import-node)))
 719     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 720     (let ((import (js2-import-node-import import-node)))
 721       (should (not (equal nil import)))
 722       (should (not (equal nil (js2-import-clause-node-named-imports import))))
 723       (let ((default (js2-import-clause-node-default-binding import))
 724             (named-imports (js2-import-clause-node-named-imports import)))
 725         (should (not (equal nil default)))
 726         (should (equal "bob" (js2-name-node-name (js2-export-binding-node-local-name default))))
 727         (should (not (equal nil named-imports)))
 728         (should (= 2 (length named-imports))))))
 729   (should (js2-scope-get-symbol js2-current-scope "bob"))
 730   (should (js2-scope-get-symbol js2-current-scope "cookies"))
 731   (should (js2-scope-get-symbol js2-current-scope "PIE")))
 732
 733 (js2-deftest parse-this-module-in-from-clause "import {url} from this module;"
 734   (js2-push-scope (make-js2-scope :pos 0))
 735   (js2-init-scanner)
 736   (should (js2-match-token js2-IMPORT))
 737   (let ((import-node (js2-parse-import)))
 738     (should import-node)
 739     (let ((from-clause (js2-import-node-from import-node)))
 740       (should from-clause)
 741       (should (equal "this" (js2-from-clause-node-module-id from-clause)))
 742       (should (js2-from-clause-node-metadata-p from-clause)))))
 743
 744 (js2-deftest-parse import-only-for-side-effects "import 'src/lib';")
 745 (js2-deftest-parse import-default-only "import theDefault from 'src/lib';")
 746 (js2-deftest-parse import-named-only "import {one, two} from 'src/lib';")
 747 (js2-deftest-parse import-default-and-named "import theDefault, {one, two} from 'src/lib';")
 748 (js2-deftest-parse import-renaming-default "import * as lib from 'src/mylib';")
 749 (js2-deftest-parse import-renaming-named "import {one as uno, two as dos} from 'src/lib';")
 750 (js2-deftest-parse import-default-and-namespace "import robert as bob, * as lib from 'src/lib';")
 751 (js2-deftest-parse import-from-this-module "import {url} from this module;")
 752
 753 ;; Module Exports
 754
 755 (js2-deftest export-rexport "export * from 'other/lib'"
 756   (js2-init-scanner)
 757   (should (js2-match-token js2-EXPORT))
 758   (let ((export-node (js2-parse-export)))
 759     (should export-node)
 760     (should (js2-export-node-from-clause export-node))))
 761
 762 (js2-deftest export-export-named-list "export {foo, bar as bang};"
 763   (js2-init-scanner)
 764   (should (js2-match-token js2-EXPORT))
 765   (let ((export-node (js2-parse-export)))
 766     (should export-node)
 767     (let ((exports (js2-export-node-exports-list export-node)))
 768       (should exports)
 769       (should (= 2 (length exports))))))
 770
 771 (js2-deftest re-export-named-list "export {foo, bar as bang} from 'other/lib'"
 772   (js2-init-scanner)
 773   (should (js2-match-token js2-EXPORT))
 774   (let ((export-node (js2-parse-export)))
 775     (should export-node)
 776     (should (js2-export-node-from-clause export-node))
 777     (let ((exports (js2-export-node-exports-list export-node)))
 778       (should exports)
 779       (should (= 2 (length exports))))))
 780
 781 (js2-deftest export-variable-statement "export var foo = 'bar', baz = 'bang';"
 782   (js2-init-scanner)
 783   (js2-push-scope (make-js2-scope :pos 0))
 784   (should (js2-match-token js2-EXPORT))
 785   (let ((export-node (js2-parse-export)))
 786     (should export-node)
 787     (should (js2-export-node-declaration export-node))))
 788
 789 (js2-deftest export-const-declaration "export const PI = Math.PI;"
 790   (js2-init-scanner)
 791   (js2-push-scope (make-js2-scope :pos 0))
 792   (should (js2-match-token js2-EXPORT))
 793   (let ((export-node (js2-parse-export)))
 794     (should export-node)
 795     (should (js2-export-node-declaration export-node))))
 796
 797 (js2-deftest export-let-declaration "export let foo = [1];"
 798   (js2-init-scanner)
 799   (js2-push-scope (make-js2-scope :pos 0))
 800   (should (js2-match-token js2-EXPORT))
 801   (let ((export-node (js2-parse-export)))
 802     (should export-node)
 803     (should (js2-var-decl-node-p (js2-export-node-declaration export-node)))))
 804
 805 (js2-deftest export-class-declaration "export class Foo {}"
 806   (js2-init-scanner)
 807   (js2-push-scope (make-js2-scope :pos 0))
 808   (should (js2-match-token js2-EXPORT))
 809   (let ((export-node (js2-parse-export)))
 810     (should export-node)
 811     (should (js2-class-node-p (js2-export-node-declaration export-node)))))
 812
 813 (js2-deftest export-function-declaration "export default function doStuff() {}"
 814   (js2-init-scanner)
 815   (js2-push-scope (make-js2-scope :pos 0))
 816   (should (js2-match-token js2-EXPORT))
 817   (let ((export-node (js2-parse-export)))
 818     (should export-node)
 819     (should (js2-export-node-default export-node))))
 820
 821 (js2-deftest export-generator-declaration "export default function* one() {}"
 822   (js2-init-scanner)
 823   (js2-push-scope (make-js2-scope :pos 0))
 824   (should (js2-match-token js2-EXPORT))
 825   (let ((export-node (js2-parse-export)))
 826     (should export-node)
 827     (should (js2-export-node-default export-node))))
 828
 829 (js2-deftest export-assignment-expression "export default a = b;"
 830   (js2-init-scanner)
 831   (js2-push-scope (make-js2-scope :pos 0))
 832   (should (js2-match-token js2-EXPORT))
 833   (let ((export-node (js2-parse-export)))
 834     (should export-node)
 835     (should (js2-export-node-default export-node))))
 836
 837 (js2-deftest export-function-no-semicolon "export default function foo() {}"
 838   (js2-mode--and-parse)
 839   (should (equal nil js2-parsed-warnings)))
 840 (js2-deftest export-default-function-no-semicolon "export function foo() {}"
 841   (js2-mode--and-parse)
 842   (should (equal nil js2-parsed-warnings)))
 843 (js2-deftest export-anything-else-does-require-a-semicolon "export var obj = {}"
 844   (js2-mode--and-parse)
 845   (should (not (equal nil js2-parsed-warnings))))
 846
 847 (js2-deftest export-default-async-function-no-semicolon "export default async function foo() {}"
 848   (js2-mode--and-parse)
 849   (should (equal nil js2-parsed-warnings)))
 850 (js2-deftest export-async-function-no-semicolon "export async function foo() {}"
 851   (js2-mode--and-parse)
 852   (should (equal nil js2-parsed-warnings)))
 853
 854 (js2-deftest-parse parse-export-rexport "export * from 'other/lib';")
 855 (js2-deftest-parse parse-export-export-named-list "export {foo, bar as bang};")
 856 (js2-deftest-parse parse-re-export-named-list "export {foo, bar as bang} from 'other/lib';")
 857 (js2-deftest-parse parse-export-const-declaration "export const PI = Math.PI;")
 858 (js2-deftest-parse parse-export-let-declaration "export let foo = [1];")
 859 (js2-deftest-parse parse-export-function-declaration "export default function doStuff() {\n}")
 860 (js2-deftest-parse parse-export-generator-declaration "export default function* one() {\n}")
 861 (js2-deftest-parse parse-export-assignment-expression "export default a = b;")
 862
 863 (js2-deftest-parse parse-export-function-declaration-no-semi
 864   "export function f() {\n}")
 865
 866 (js2-deftest-parse parse-export-class-declaration-no-semi
 867   "export class C {\n}")
 868
 869 (js2-deftest-parse parse-export-async-function-allow-await
 870   "export async function f() {\n  await f();\n}")
 871
 872 (js2-deftest-parse parse-export-default-async-function-allow-await
 873   "export default async function f() {\n  await f();\n}")
 874
 875 ;;; Strings
 876
 877 (js2-deftest-parse string-literal
 878   "var x = 'y';")
 879
 880 (js2-deftest-parse object-get-string-literal
 881   "var x = {y: 5};\nvar z = x[\"y\"];")
 882
 883 (js2-deftest-parse template-no-substritutions
 884   "var x = `abc
 885             def`, y = `\\u0000`;")
 886
 887 (js2-deftest-parse template-with-substitutions
 888   "var y = `${a + b} ${d + e + f}`;")
 889
 890 (js2-deftest-parse tagged-template
 891   "foo.args`${++x, \"o\"}k`;")
 892
 893 ;;; Classes
 894
 895 (js2-deftest-parse parse-harmony-class-statement
 896   "class Foo {\n  get bar() {  return 42;\n}\n  set bar(x) {  y = x;\n}\n}")
 897
 898 (js2-deftest-parse parse-harmony-class-statement-without-name-is-not-ok
 899   "class {\n  get bar() {  return 42;\n}\n}"
 900   :syntax-error "{")
 901
 902 (js2-deftest-parse parse-harmony-class-expression
 903   "var Foo1 = class Foo {\n  bar() {  return 42;\n}\n};")
 904
 905 (js2-deftest-parse parse-harmony-anonymous-class-expression
 906   "var Foo = class {\n  set bar(x) {  bar = x;\n}\n};")
 907
 908 (js2-deftest-parse parse-harmony-class-with-extends
 909   "class Foo extends Bar {\n}")
 910
 911 (js2-deftest-parse parse-harmony-anonymous-class-with-extends
 912   "foo.Foo = class extends Bar {\n  set bar(x) {  bar = x;\n}\n};")
 913
 914 (js2-deftest-parse parse-harmony-class-with-complex-extends
 915   "class Foo extends foo[BAR][2].Baz {\n}")
 916
 917 (js2-deftest-parse parse-harmony-class-missing-extended-class-is-not-ok
 918   "class Foo extends {\n}"
 919   :syntax-error "extends")
 920
 921 (js2-deftest-parse parse-harmony-class-static-method
 922   "class Foo extends Bar {\n  static bar() {  return 42;\n}\n}")
 923
 924 (js2-deftest-parse parse-unterminated-class-is-not-okay
 925   "class Foo {\n  get bar() {  return 42;\n}"
 926   :syntax-error "}")
 927
 928 (js2-deftest-parse parse-super-keyword
 929   "class Foo {\n  constructor() {  super(42);\n}\n  foo() {  super.foo();\n}\n}")
 930
 931 (js2-deftest-parse parse-class-keywordlike-method
 932   "class C {\n  delete() {}\n  if() {}\n}")
 933
 934 (js2-deftest-parse parse-harmony-class-allow-semicolon-element
 935   "class Foo {;}" :reference "class Foo {\n}")
 936
 937 ;;; Scopes
 938
 939 (js2-deftest ast-symbol-table-includes-fn-node "function foo() {}"
 940   (js2-mode--and-parse)
 941   (let ((entry (js2-scope-get-symbol js2-mode-ast 'foo)))
 942     (should (= (js2-symbol-decl-type entry) js2-FUNCTION))
 943     (should (equal (js2-symbol-name entry) "foo"))
 944     (should (js2-function-node-p (js2-symbol-ast-node entry)))))
 945
 946 (js2-deftest fn-symbol-table-includes-nested-fn "function foo() {
 947   function bar() {}
 948   var x;
 949 }"
 950   (js2-mode--and-parse)
 951   (let* ((scope (js2-node-at-point (point-min)))
 952          (fn-entry (js2-scope-get-symbol scope 'bar))
 953          (var-entry (js2-scope-get-symbol scope 'x)))
 954     (should (string= (js2-name-node-name (js2-function-node-name scope)) "foo"))
 955     (should (= (js2-symbol-decl-type fn-entry) js2-FUNCTION))
 956     (should (js2-function-node-p (js2-symbol-ast-node fn-entry)))
 957     (should (= (js2-symbol-decl-type var-entry) js2-VAR))
 958     (should (js2-name-node-p (js2-symbol-ast-node var-entry)))))
 959
 960 (defun js2-test-scope-of-nth-variable-satisifies-predicate (variable nth predicate)
 961   (goto-char (point-min))
 962   (dotimes (n (1+ nth)) (search-forward variable))
 963   (forward-char -1)
 964   (let ((scope (js2-node-get-enclosing-scope (js2-node-at-point))))
 965     (should (funcall predicate (js2-get-defining-scope scope variable)))))
 966
 967 (js2-deftest for-node-is-declaration-scope "for (let i = 0; i; ++i) {};"
 968   (js2-mode--and-parse)
 969   (js2-test-scope-of-nth-variable-satisifies-predicate "i" 0 #'js2-for-node-p))
 970
 971 (js2-deftest const-scope-inside-script "{ const a; } a;"
 972   (js2-mode--and-parse)
 973   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-block-node-p)
 974   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'null))
 975
 976 (js2-deftest const-scope-inside-function "function f() { { const a; } a; }"
 977   (js2-mode--and-parse)
 978   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 0 #'js2-block-node-p)
 979   (js2-test-scope-of-nth-variable-satisifies-predicate "a" 1 #'null))
 980
 981 (js2-deftest array-comp-is-result-scope "[x * 2 for (x in y)];"
 982   (js2-mode--and-parse)
 983   (js2-test-scope-of-nth-variable-satisifies-predicate "x" 0 #'js2-comp-loop-node-p))
 984
 985 (js2-deftest array-comp-has-parent-scope
 986              "var a,b=[for (i of [[1,2]]) for (j of i) j * a];"
 987   (js2-mode--and-parse)
 988   (search-forward "for")
 989   (forward-char -3)
 990   (let ((node (js2-node-at-point)))
 991     (should (js2-scope-parent-scope node))
 992     (should (js2-get-defining-scope node "j"))))
 993
 994 ;;; Tokenizer
 995
 996 (js2-deftest get-token "(1+1)"
 997   (js2-init-scanner)
 998   (should (eq js2-LP (js2-next-token)))
 999   (should (eq js2-NUMBER (js2-next-token)))
1000   (should (eq js2-ADD (js2-next-token)))
1001   (should (eq js2-NUMBER (js2-next-token)))
1002   (should (eq js2-RP (js2-next-token))))
1003
1004 (js2-deftest unget-token "()"
1005   (js2-init-scanner)
1006   (should (eq js2-LP (js2-next-token)))
1007   (js2-unget-token)
1008   (should (eq js2-LP (js2-next-token)))
1009   (should (eq js2-RP (js2-next-token))))
1010
1011 (js2-deftest get-token-or-eol "x\n++;"
1012   (js2-init-scanner)
1013   (should (eq js2-NAME (js2-next-token)))
1014   (should (eq js2-EOL (js2-peek-token-or-eol)))
1015   (should (eq js2-INC (js2-next-token)))
1016   (should (eq js2-SEMI (js2-peek-token-or-eol))))
1017
1018 (js2-deftest unget-token-over-eol-and-comment "x\n//abc\ny"
1019   (js2-init-scanner)
1020   (should (eq js2-NAME (js2-next-token)))
1021   (should (eq js2-NAME (js2-next-token)))
1022   (should (equal "y" (js2-current-token-string)))
1023   (js2-unget-token)
1024   (should (eq js2-NAME (js2-current-token-type)))
1025   (should (equal "x" (js2-current-token-string))))
1026
1027 (js2-deftest ts-seek "(1+2)"
1028   (js2-init-scanner)
1029   (should (eq js2-LP (js2-next-token)))
1030   (should (eq js2-NUMBER (js2-next-token)))
1031   (js2-unget-token)
1032   (let ((state (make-js2-ts-state)))
1033     (should (eq js2-NUMBER (js2-next-token)))
1034     (should (eq js2-ADD (js2-next-token)))
1035     (js2-ts-seek state)
1036     (should (eq 1 js2-ti-lookahead))
1037     (should (eq js2-NUMBER (js2-next-token)))
1038     (should (eq 1 (js2-token-number
1039                    (js2-current-token))))))
1040
1041 (js2-deftest get-token-template-literal "`abc ${i} z ${j} def`"
1042   (js2-init-scanner)
1043   (should (eq js2-TEMPLATE_HEAD (js2-next-token)))
1044   (should (equal "abc " (js2-current-token-string)))
1045   (should (eq js2-NAME (js2-next-token)))
1046   (should (eq js2-RC (js2-next-token)))
1047   (should (eq js2-TEMPLATE_HEAD (js2-next-token 'TEMPLATE_TAIL)))
1048   (should (equal " z " (js2-current-token-string)))
1049   (should (eq js2-NAME (js2-next-token)))
1050   (should (eq js2-RC (js2-next-token)))
1051   (should (eq js2-NO_SUBS_TEMPLATE (js2-next-token 'TEMPLATE_TAIL)))
1052   (should (equal " def" (js2-current-token-string))))
1053
1054 ;;; Error handling
1055
1056 (js2-deftest for-node-with-error-len "for "
1057   (js2-mode--and-parse)
1058   (let ((node (js2-node-at-point (point-min))))
1059     (should (= (js2-node-len (js2-node-parent node)) 4))))
1060
1061 (js2-deftest function-without-parens-error "function b {}"
1062   ;; Should finish the parse.
1063   (js2-mode--and-parse))
1064
1065 ;;; Comments
1066
1067 (js2-deftest comment-node-length "//"
1068   (js2-mode--and-parse)
1069   (let ((node (js2-node-at-point (point-min))))
1070     (should (= (js2-node-len node) 2))))
1071
1072 (js2-deftest comment-node-length-newline "//\n"
1073   (js2-mode--and-parse)
1074   (let ((node (js2-node-at-point (point-min))))
1075     (should (= (js2-node-len node) 3))))
1076
1077 ;;; Variables classification
1078
1079 (defun js2--variables-summary (vars)
1080   (let (r)
1081     (setq vars (let (aslist)
1082                  (maphash (lambda (k v) (push (cons k v) aslist)) vars)
1083                  aslist))
1084     (dolist (v (sort vars (lambda (a b) (< (js2-node-abs-pos (js2-symbol-ast-node (car a)))
1085                                       (js2-node-abs-pos (js2-symbol-ast-node (car b)))))))
1086       (let* ((symbol (car v))
1087              (inition (cadr v))
1088              (uses (cddr v))
1089              (symn (js2-symbol-ast-node symbol))
1090              (namen (js2--get-name-node symn)))
1091         (push (format "%s@%s:%s"
1092                       (js2-symbol-name symbol)
1093                       (js2-node-abs-pos namen)
1094                       (if (eq inition ?P)
1095                           "P"
1096                         (if uses
1097                             (if inition "I" "N")
1098                           "U"))) r)
1099         (dolist (u (sort (cddr v) (lambda (a b) (< (js2-node-abs-pos a)
1100                                               (js2-node-abs-pos b)))))
1101           (push (js2-node-abs-pos u) r))))
1102     (reverse r)))
1103
1104 (defmacro js2-deftest-classify-variables (name buffer-contents summary)
1105  (declare (indent defun))
1106   `(ert-deftest ,(intern (format "js2-classify-variables-%s" name)) ()
1107      (with-temp-buffer
1108        (save-excursion
1109          (insert ,buffer-contents))
1110        (unwind-protect
1111            (progn
1112              (js2-mode--and-parse)
1113              (should (equal ,summary (js2--variables-summary
1114                                       (js2--classify-variables)))))
1115          (fundamental-mode)))))
1116
1117 (js2-deftest-classify-variables incomplete-var-statement
1118   "var"
1119   '())
1120
1121 (js2-deftest-classify-variables unused-variable
1122   "function foo () { var x; return 42; }"
1123   '("foo@10:U" "x@23:U"))
1124
1125 (js2-deftest-classify-variables unused-variable-declared-twice
1126   "function foo (a) { var x; function bar () { var x; x=42; }; return a;}"
1127   '("foo@10:U" "a@15:P" 68 "x@24:U" "bar@36:U" "x@49:U"))
1128
1129 (js2-deftest-classify-variables assigned-variable
1130   "function foo () { var x; x=42; return x; }"
1131   '("foo@10:U" "x@23:I" 39))
1132
1133 (js2-deftest-classify-variables assignment-in-nested-function
1134   "function foo () { var x; function bar () { x=42; }; }"
1135   '("foo@10:U" "x@23:U" "bar@35:U"))
1136
1137 (js2-deftest-classify-variables unused-nested-function
1138   "function foo() { var i, j=1; function bar() { var x, y=42, z=i; return y; } return i; }"
1139   '("foo@10:U" "i@22:N" 62 84 "j@25:U" "bar@39:U" "x@51:U" "y@54:I" 72 "z@60:U"))
1140
1141 (js2-deftest-classify-variables prop-get-initialized
1142   "function foo () { var x, y={}; y.a=x; }"
1143   '("foo@10:U" "x@23:N" 36 "y@26:I" 32))
1144
1145 (js2-deftest-classify-variables prop-get-uninitialized
1146   "function foo () { var x; if(x.foo) alert('boom'); }"
1147   '("foo@10:U" "x@23:N" 29))
1148
1149 (js2-deftest-classify-variables prop-get-function-assignment
1150   "(function(w) { w.f = function() { var a=42, m; return a; }; })(window);"
1151   '("w@11:P" 11 16 "a@39:I" 55 "m@45:U"))
1152
1153 (js2-deftest-classify-variables let-declaration
1154   "function foo () { let x,y=1; return x; }"
1155   '("foo@10:U" "x@23:N" 37 "y@25:U"))
1156
1157 (js2-deftest-classify-variables external-function-call
1158   "function foo (m) { console.log(m, arguments); }"
1159   '("foo@10:U" "m@15:P" 32))
1160
1161 (js2-deftest-classify-variables global-function-call
1162   "function bar () { return 42; } function foo (a) { return bar(); }"
1163   '("bar@10:I" 58 "foo@41:U" "a@46:P"))
1164
1165 (js2-deftest-classify-variables let-declaration-for-scope
1166   "function foo () { for(let x=1,y; x<y; y++) {} }"
1167   '("foo@10:U" "x@27:I" 34 "y@31:N" 36 39))
1168
1169 (js2-deftest-classify-variables arguments-implicit-var
1170   "function foo () { var p; for(p in arguments) { return p; } }"
1171   '("foo@10:U" "p@23:I" 55))
1172
1173 (js2-deftest-classify-variables catch-error-variable
1174   "function foo () { try { throw 'Foo'; } catch (e) { console.log(e); }"
1175   '("foo@10:U" "e@47:I" 64))
1176
1177 (js2-deftest-classify-variables prop-get-assignment
1178   "function foo () { var x={y:{z:{}}}; x.y.z=42; }"
1179   '("foo@10:U" "x@23:I" 37))
1180
1181 (js2-deftest-classify-variables unused-function-argument
1182   "function foo (a) { return 42; }"
1183   '("foo@10:U" "a@15:P"))
1184
1185 (js2-deftest-classify-variables used-function-argument
1186   "function foo (a) { a=42; return a; }"
1187   '("foo@10:U" "a@15:P" 33))
1188
1189 (js2-deftest-classify-variables prop-get
1190   "function foo (a) { a=navigator.x||navigator.y; return a; }"
1191   '("foo@10:U" "a@15:P" 55))
1192
1193 (js2-deftest-classify-variables for-in-loop
1194   "function foo () { var d={}; for(var k in d) {var v=d[k]; } }"
1195   '("foo@10:U" "d@23:I" 42 52 "k@37:I" 54 "v@50:U"))
1196
1197 (js2-deftest-classify-variables array-comprehension-legacy
1198   "function foo() { var j,a=[for (i of [1,2,3]) i*j]; }"
1199   '("foo@10:U" "j@22:N" 48 "a@24:U" "i@32:I" 46))
1200
1201 (js2-deftest-classify-variables array-comprehension
1202   "function foo() { var j,a=[[i,j] for (i of [1,2,3])]; }"
1203   '("foo@10:U" "j@22:N" 30 "a@24:U" "i@38:I" 28))
1204
1205 (js2-deftest-classify-variables return-named-function
1206   "function foo() { var a=42; return function bar() { return a; } }"
1207   '("foo@10:U" "a@22:I" 59 "bar@44:I" 44))
1208
1209 (js2-deftest-classify-variables named-wrapper-function
1210   "function foo() { var a; (function bar() { a=42; })(); return a; }"
1211   '("foo@10:U" "a@22:I" 62 "bar@35:I" 35))