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