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
  26 (defmacro js2-deftest (name buffer-contents &rest body)
  27   `(ert-deftest ,(intern (format "js2-%s" name)) ()
  28      (with-temp-buffer
  29        (save-excursion
  30          (insert ,buffer-contents))
  31        (unwind-protect
  32            (progn
  33              ,@body)
  34          (fundamental-mode)))))
  35
  36 (put 'js2-deftest 'lisp-indent-function 'defun)
  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 (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             (destructuring-bind (_ pos len) (first 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 (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   `(ert-deftest ,(intern (format "js2-%s" name)) ()
  71      (let ,(append bind '((js2-basic-offset 2)))
  72        (js2-test-parse-string ,code-string
  73                               :syntax-error ,syntax-error
  74                               :errors-count ,errors-count
  75                               :reference ,reference))))
  76
  77 (put 'js2-deftest-parse 'lisp-indent-function 'defun)
  78
  79 ;;; Basics
  80
  81 (js2-deftest-parse variable-assignment
  82   "a = 1;")
  83
  84 (js2-deftest-parse empty-object-literal
  85   "b = {};")
  86
  87 (js2-deftest-parse empty-array-literal
  88   "c = [];")
  89
  90 (js2-deftest-parse array-with-missing-elements
  91   "var a = [1, 2, ,];")
  92
  93 (js2-deftest-parse comma-after-regexp
  94   "d = /eee/, 42;")
  95
  96 (js2-deftest-parse return-statement
  97   "function foo() {\n  return 2;\n}")
  98
  99 (js2-deftest-parse function-statement
 100   "function foo() {\n}")
 101
 102 (js2-deftest-parse function-statement-inside-block
 103   "if (true) {\n  function foo() {\n  }\n}")
 104
 105 (js2-deftest-parse function-expression-statements-are-verboten
 106   "function() {}" :syntax-error "(")
 107
 108 (js2-deftest-parse member-expr-as-function-name
 109   "function a.b.c[2](x, y) {\n}"
 110   :bind ((js2-allow-member-expr-as-function-name t)))
 111
 112 (js2-deftest-parse named-function-expression
 113   "a = function b() {};")
 114
 115 (js2-deftest-parse parenthesized-expression
 116   "(1 + 2);")
 117
 118 (js2-deftest-parse for-with-in-operator-in-parens
 119   "for (var y = (0 in []) in {}) {\n}")
 120
 121 (js2-deftest-parse for-with-in-operator-in-cond
 122   "for (var y = 1 ? 0 in [] : false in {}) {\n}")
 123
 124 (js2-deftest-parse let-expression
 125   "(let (x = 42) x);")
 126
 127 (js2-deftest-parse let-expression-statement
 128   "let (x = 42) x;")
 129
 130 ;;; Callers of `js2-valid-prop-name-token'
 131
 132 (js2-deftest-parse parse-property-access-when-not-keyword
 133   "A.foo = 3;")
 134
 135 (js2-deftest-parse parse-property-access-when-keyword
 136   "A.in = 3;"
 137   :bind ((js2-allow-keywords-as-property-names t)))
 138
 139 (js2-deftest-parse parse-property-access-when-keyword-no-xml
 140   "A.in = 3;"
 141   :bind ((js2-allow-keywords-as-property-names t)
 142          (js2-compiler-xml-available nil)))
 143
 144 (js2-deftest-parse parse-object-literal-when-not-keyword
 145   "a = {b: 1};")
 146
 147 (js2-deftest-parse parse-object-literal-when-keyword
 148   "a = {in: 1};"
 149   :bind ((js2-allow-keywords-as-property-names t)))
 150
 151 ;;; 'of' contextual keyword
 152
 153 (js2-deftest-parse parse-legacy-array-comp-loop-with-of
 154   "[a for (a of [])];")
 155
 156 (js2-deftest-parse parse-array-comp-loop
 157   "[for (a of []) a];")
 158
 159 (js2-deftest-parse parse-for-of
 160   "for (var a of []) {\n}")
 161
 162 (js2-deftest-parse of-can-be-var-name
 163   "var of = 3;")
 164
 165 (js2-deftest-parse of-can-be-function-name
 166   "function of() {\n}")
 167
 168 ;;; Destructuring binding
 169
 170 (js2-deftest-parse destruct-in-declaration
 171   "var {a, b} = {a: 1, b: 2};")
 172
 173 (js2-deftest-parse destruct-in-arguments
 174   "function f({a: aa, b: bb}) {\n}")
 175
 176 (js2-deftest-parse destruct-in-array-comp-loop
 177   "[a + b for ([a, b] in [[0, 1], [1, 2]])];")
 178
 179 (js2-deftest-parse destruct-in-catch-clause
 180   "try {\n} catch ({a, b}) {\n  a + b;\n}")
 181
 182 ;;; Object literals
 183
 184 (js2-deftest-parse object-literal-shorthand
 185   "var x = {a: 1, b, c: 1, d};")
 186
 187 (js2-deftest-parse object-literal-shorthard-with-number
 188   "var a = {1};" :syntax-error ";" :errors-count 2)
 189
 190 (js2-deftest-parse object-literal-method
 191   "var x = {f(y) {  return y;\n}};")
 192
 193 (js2-deftest-parse object-literal-getter-method
 194   "var x = {get f() {  return 42;\n}};")
 195
 196 (js2-deftest-parse object-literal-setter-method
 197   "var x = {set f(y) {  x = y;\n}};")
 198
 199 (js2-deftest-parse object-literal-computed-keys
 200   "var x = {[Symbol.iterator]: function() {}};")
 201
 202 ;;; Function definition
 203
 204 (js2-deftest function-redeclaring-var "var gen = 3; function gen() {};"
 205   (js2-mode)
 206   (should (= (length (js2-ast-root-warnings js2-mode-ast)) 1)))
 207
 208 (js2-deftest function-expression-var-same-name "var gen = function gen() {};"
 209   (js2-mode)
 210   (should (null (js2-ast-root-warnings js2-mode-ast))))
 211
 212 ;;; Function parameters
 213
 214 (js2-deftest-parse function-with-default-parameters
 215   "function foo(a = 1, b = a + 1) {\n}")
 216
 217 (js2-deftest-parse function-with-no-default-after-default
 218   "function foo(a = 1, b) {\n}"
 219   :syntax-error "b")
 220
 221 (js2-deftest-parse function-with-destruct-after-default
 222   "function foo(a = 1, {b, c}) {\n}"
 223   :syntax-error "{")
 224
 225 (js2-deftest-parse function-with-rest-parameter
 226   "function foo(a, b, ...rest) {\n}")
 227
 228 (js2-deftest-parse function-with-param-after-rest-parameter
 229   "function foo(a, ...b, rest) {\n}"
 230   :syntax-error "rest")
 231
 232 (js2-deftest-parse function-with-destruct-after-rest-parameter
 233   "function foo(a, ...b, {}) {\n}"
 234   :syntax-error "{}")
 235
 236 (js2-deftest-parse function-with-rest-after-default-parameter
 237   "function foo(a = 1, ...rest) {\n}")
 238
 239 ;;; Spread operator
 240
 241 (js2-deftest-parse spread-in-array-literal
 242   "[1, ...[2, 3], 4, ...[5, 6]];")
 243
 244 (js2-deftest-parse spread-in-function-call
 245   "f(3, ...[t(2), t(3)], 42, ...[t(4)]);")
 246
 247 ;;; Arrow functions
 248
 249 (js2-deftest-parse arrow-function-with-empty-args-and-no-curlies
 250   "() => false;" :reference "() => {false};")
 251
 252 (js2-deftest-parse arrow-function-with-args-and-curlies
 253   "(a, b = 1, ...c) => {  c;\n};")
 254
 255 (js2-deftest-parse arrow-function-with-destructuring
 256   "([{a}, b]) => {  a + b;\n};")
 257
 258 (js2-deftest-parse parenless-arrow-function-prohibits-rest
 259   "...b => {b + 1;};" :syntax-error "=>" :errors-count 1)
 260
 261 (js2-deftest-parse parenless-arrow-function-prohibits-destructuring
 262   "[a, b] => {a + b;};" :syntax-error "=>" :errors-count 4)
 263
 264 ;;; Automatic semicolon insertion
 265
 266 (js2-deftest-parse no-auto-semi-insertion-after-if
 267   "if (true) {\n}")
 268
 269 (js2-deftest-parse auto-semi-insertion-after-function
 270   "a = function() {}" :reference "a = function() {};")
 271
 272 (js2-deftest-parse auto-semi-one-variable-per-line
 273   "x\ny" :reference "x;\ny;")
 274
 275 ;;; Labels
 276
 277 (js2-deftest-parse labeled-stmt-node
 278   "foo:\nbar:\nx = y + 1;")
 279
 280 (js2-deftest no-label-node-inside-expr "x = y:"
 281   (let (js2-parse-interruptable-p)
 282     (js2-mode))
 283   (let ((assignment (js2-expr-stmt-node-expr (car (js2-scope-kids js2-mode-ast)))))
 284     (should (js2-name-node-p (js2-assign-node-right assignment)))))
 285
 286 (js2-deftest-parse label-and-loops "for (; ; ) {
 287   loop:
 288   for (; ; ) {
 289     continue loop;
 290   }
 291 }")
 292
 293 ;;; Generators
 294
 295 (js2-deftest-parse legacy-generator "function foo() {\n  yield 1;\n}")
 296
 297 (js2-deftest-parse legacy-generator-cannot-return
 298   "function foo() {\n  yield 1;\n return 2;\n}" :syntax-error "return 2")
 299
 300 (js2-deftest-parse harmony-generator "function* bar() {\n  yield 2;\n  return 3;\n}")
 301
 302 (js2-deftest-parse harmony-generator-yield-star "(function*(a) {  yield* a;\n});")
 303
 304 ;;; Comprehensions
 305
 306 (js2-deftest-parse parse-legacy-array-comp-loop-with-filter
 307   "[a for (a in b) if (a == 2)];")
 308
 309 (js2-deftest-parse parse-array-comp-loop-with-filters
 310   "[for (a in b) if (a == 2) if (b != 10) a];")
 311
 312 (js2-deftest-parse parse-generator-comp-loop-with-filters
 313   "(for (x of y) if (x != 4) x);")
 314
 315 (js2-deftest-parse parse-array-comp-with-yield-is-ok
 316   "(function() {  return [for (x of []) yield x];\n});")
 317
 318 (js2-deftest-parse parse-generator-comp-with-yield-is-not-ok
 319   "(function() {  return (for (x of []) yield x);\n});"
 320   :syntax-error "yield")
 321
 322 (js2-deftest-parse parse-generator-comp-with-yield-inside-function-is-ok
 323   "(for (x of []) function*() {  yield x;\n});")
 324
 325 ;;; Numbers
 326
 327 (js2-deftest-parse decimal-starting-with-zero "081;" :reference "81;")
 328
 329 (js2-deftest-parse huge-hex "0x0123456789abcdefABCDEF;" :reference "-1;")
 330
 331 (js2-deftest-parse octal-without-o "071;" :reference "57;")
 332
 333 (js2-deftest-parse hex-number-okay "0x123;" :reference "291;")
 334
 335 (js2-deftest-parse hex-number-broken "0xz23;"
 336   :syntax-error "0xz" :errors-count 2)
 337
 338 (js2-deftest-parse binary-number-okay "0b101;" :reference "5;")
 339
 340 (js2-deftest-parse binary-number-broken "0b210;"
 341   :syntax-error "0b2" :errors-count 2)
 342
 343 (js2-deftest-parse octal-number-okay "0o765;" :reference "501;")
 344
 345 (js2-deftest-parse octal-number-broken "0o812;"
 346   :syntax-error "0o8" :errors-count 2)
 347
 348 ;;; Modules
 349
 350 (js2-deftest parse-export-bindings "{one, two as dos}"
 351   (js2-init-scanner)
 352   (should (js2-match-token js2-LC))
 353   (let ((imports (js2-parse-export-bindings)))
 354     (should (not (equal nil imports)))
 355     (should (= 2 (length imports)))
 356     (let ((first (nth 0 imports))
 357           (second (nth 1 imports)))
 358       (should (equal "one" (js2-name-node-name (js2-export-binding-node-extern-name first))))
 359       (should (equal "two" (js2-name-node-name (js2-export-binding-node-extern-name second))))
 360       (let ((first-name (js2-export-binding-node-local-name first))
 361             (second-name (js2-export-binding-node-local-name second)))
 362         (should (equal first (js2-node-parent first-name)))
 363         (should (equal 3 (js2-node-len first-name)))
 364         (should (equal "one" (js2-name-node-name first-name)))
 365         (should (equal second (js2-node-parent second-name)))
 366         (should (equal 3 (js2-node-len second-name)))
 367         (should (equal "dos" (js2-name-node-name second-name)))))))
 368
 369 (js2-deftest parse-export-binding-as-default "one as default"
 370   (js2-init-scanner)
 371   (let ((binding (js2-maybe-parse-export-binding)))
 372     (should binding)
 373     (should (js2-export-binding-node-p binding))
 374     (let ((name (js2-export-binding-node-local-name binding)))
 375       (should name)
 376       (should (equal "default" (js2-name-node-name name))))))
 377
 378 (js2-deftest parse-namepsace-import "* as lib;"
 379   (js2-init-scanner)
 380   (should (js2-match-token js2-MUL))
 381   (let ((namespace-import (js2-parse-namespace-import)))
 382     (should (not (equal nil namespace-import)))
 383     (should (js2-namespace-import-node-p namespace-import))
 384     (should (= 1 (js2-node-pos namespace-import)))
 385     (should (equal 8 (js2-node-len namespace-import)))
 386     (let ((name-node (js2-namespace-import-node-name namespace-import)))
 387       (should (equal "lib" (js2-name-node-name name-node)))
 388       (should (= 5 (js2-node-pos name-node))))))
 389
 390 (js2-deftest parse-from-clause "from 'foo/bar';"
 391   (js2-init-scanner)
 392   (let ((from (js2-parse-from-clause)))
 393     (should (not (equal nil from)))
 394     (should (= 1 (js2-node-pos from)))
 395     (should (= 14 (js2-node-len from)))
 396     (should (equal "foo/bar" (js2-from-clause-node-module-id from)))))
 397
 398 (js2-deftest parse-import-module-id-only "import 'src/lib'"
 399   (js2-init-scanner)
 400   (should (js2-match-token js2-IMPORT))
 401   (let ((import (js2-parse-import)))
 402     (should (not (equal nil import)))
 403     (should (= 1 (js2-node-pos import)))
 404     (should (= 16 (js2-node-len import)))
 405     (should (equal nil (js2-import-node-import import)))
 406     (should (equal nil (js2-import-node-from import)))))
 407
 408 (js2-deftest parse-imported-default-binding "import theDefault from 'src/lib'"
 409   (js2-push-scope (make-js2-scope :pos 0))
 410   (js2-init-scanner)
 411   (should (js2-match-token js2-IMPORT))
 412   (let ((import-node (js2-parse-import)))
 413     (should (not (equal nil import-node)))
 414     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 415     (let ((import (js2-import-node-import import-node)))
 416       (should (not (equal nil import)))
 417       (should (equal nil (js2-import-clause-node-namespace-import import)))
 418       (should (equal nil (js2-import-clause-node-named-imports import)))
 419       (let ((default (js2-import-clause-node-default-binding import)))
 420         (should (not (equal nil default)))
 421         (should (js2-export-binding-node-p default))
 422         (should (equal "theDefault" (js2-name-node-name (js2-export-binding-node-extern-name default)))))))
 423   (should (js2-scope-get-symbol js2-current-scope "theDefault")))
 424
 425 (js2-deftest parse-import-namespace-binding "import * as lib from 'src/lib'"
 426   (js2-push-scope (make-js2-scope :pos 0))
 427   (js2-init-scanner)
 428   (should (js2-match-token js2-IMPORT))
 429   (let ((import-node (js2-parse-import)))
 430     (should (not (equal nil import-node)))
 431     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 432     (let ((import (js2-import-node-import import-node)))
 433       (should (not (equal nil import)))
 434       (should (equal nil (js2-import-clause-node-default-binding import)))
 435       (should (equal nil (js2-import-clause-node-named-imports import)))
 436       (let ((ns-import (js2-import-clause-node-namespace-import import)))
 437         (should (not (equal nil ns-import)))
 438         (should (js2-namespace-import-node-p ns-import))
 439         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 440   (should (js2-scope-get-symbol js2-current-scope "lib")))
 441
 442 (js2-deftest parse-import-named-imports "import {foo as bar, baz} from 'src/lib'"
 443   (js2-push-scope (make-js2-scope :pos 0))
 444   (js2-init-scanner)
 445   (should (js2-match-token js2-IMPORT))
 446   (let ((import-node (js2-parse-import)))
 447     (should (not (equal nil import-node)))
 448     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 449     (let ((import (js2-import-node-import import-node)))
 450       (should (not (equal nil import)))
 451       (should (equal nil (js2-import-clause-node-default-binding import)))
 452       (should (equal nil (js2-import-clause-node-namespace-import import)))
 453       (let ((named-imports (js2-import-clause-node-named-imports import)))
 454         (should (not (equal nil named-imports)))
 455         (should (listp named-imports))
 456         (should (= 2 (length named-imports)))
 457         (let ((first (nth 0 named-imports))
 458               (second (nth 1 named-imports)))
 459           (should (equal "bar" (js2-name-node-name (js2-export-binding-node-local-name first))))
 460           (should (equal "baz" (js2-name-node-name (js2-export-binding-node-local-name second))))))))
 461   (should (js2-scope-get-symbol js2-current-scope "bar"))
 462   (should (js2-scope-get-symbol js2-current-scope "baz")))
 463
 464 (js2-deftest parse-import-default-and-namespace "import stuff, * as lib from 'src/lib'"
 465   (js2-push-scope (make-js2-scope :pos 0))
 466   (js2-init-scanner)
 467   (should (js2-match-token js2-IMPORT))
 468   (let ((import-node (js2-parse-import)))
 469     (should (not (equal nil import-node)))
 470     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 471     (let ((import (js2-import-node-import import-node)))
 472       (should (not (equal nil import)))
 473       (should (equal nil (js2-import-clause-node-named-imports import)))
 474       (let ((default (js2-import-clause-node-default-binding import))
 475             (ns-import (js2-import-clause-node-namespace-import import)))
 476         (should (not (equal nil default)))
 477         (should (equal "stuff" (js2-name-node-name (js2-export-binding-node-local-name default))))
 478         (should (not (equal nil ns-import)))
 479         (should (js2-namespace-import-node-p ns-import))
 480         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 481   (should (js2-scope-get-symbol js2-current-scope "stuff"))
 482   (should (js2-scope-get-symbol js2-current-scope "lib")))
 483
 484 (js2-deftest parse-import-default-and-named-imports
 485   "import robert as bob, {cookies, pi as PIE} from 'src/lib'"
 486   (js2-push-scope (make-js2-scope :pos 0))
 487   (js2-init-scanner)
 488   (should (js2-match-token js2-IMPORT))
 489   (let ((import-node (js2-parse-import)))
 490     (should (not (equal nil import-node)))
 491     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 492     (let ((import (js2-import-node-import import-node)))
 493       (should (not (equal nil import)))
 494       (should (not (equal nil (js2-import-clause-node-named-imports import))))
 495       (let ((default (js2-import-clause-node-default-binding import))
 496             (named-imports (js2-import-clause-node-named-imports import)))
 497         (should (not (equal nil default)))
 498         (should (equal "bob" (js2-name-node-name (js2-export-binding-node-local-name default))))
 499         (should (not (equal nil named-imports)))
 500         (should (= 2 (length named-imports))))))
 501   (should (js2-scope-get-symbol js2-current-scope "bob"))
 502   (should (js2-scope-get-symbol js2-current-scope "cookies"))
 503   (should (js2-scope-get-symbol js2-current-scope "PIE")))
 504
 505 (js2-deftest parse-this-module-in-from-clause "import {url} from this module;"
 506   (js2-push-scope (make-js2-scope :pos 0))
 507   (js2-init-scanner)
 508   (should (js2-match-token js2-IMPORT))
 509   (let ((import-node (js2-parse-import)))
 510     (should import-node)
 511     (let ((from-clause (js2-import-node-from import-node)))
 512       (should from-clause)
 513       (should (equal "this" (js2-from-clause-node-module-id from-clause)))
 514       (should (js2-from-clause-node-metadata-p from-clause)))))
 515
 516 (js2-deftest-parse import-only-for-side-effects "import 'src/lib';")
 517 (js2-deftest-parse import-default-only "import theDefault from 'src/lib';")
 518 (js2-deftest-parse import-named-only "import {one, two} from 'src/lib';")
 519 (js2-deftest-parse import-default-and-named "import theDefault, {one, two} from 'src/lib';")
 520 (js2-deftest-parse import-renaming-default "import * as lib from 'src/mylib';")
 521 (js2-deftest-parse import-renaming-named "import {one as uno, two as dos} from 'src/lib';")
 522 (js2-deftest-parse import-default-and-namespace "import robert as bob, * as lib from 'src/lib';")
 523 (js2-deftest-parse import-from-this-module "import {url} from this module;")
 524
 525 ;; Module Exports
 526
 527 (js2-deftest export-rexport "export * from 'other/lib'"
 528   (js2-init-scanner)
 529   (should (js2-match-token js2-EXPORT))
 530   (let ((export-node (js2-parse-export)))
 531     (should export-node)
 532     (should (js2-export-node-from-clause export-node))))
 533
 534 (js2-deftest export-export-named-list "export {foo, bar as bang};"
 535   (js2-init-scanner)
 536   (should (js2-match-token js2-EXPORT))
 537   (let ((export-node (js2-parse-export)))
 538     (should export-node)
 539     (let ((exports (js2-export-node-exports-list export-node)))
 540       (should exports)
 541       (should (= 2 (length exports))))))
 542
 543 (js2-deftest re-export-named-list "export {foo, bar as bang} from 'other/lib'"
 544   (js2-init-scanner)
 545   (should (js2-match-token js2-EXPORT))
 546   (let ((export-node (js2-parse-export)))
 547     (should export-node)
 548     (should (js2-export-node-from-clause export-node))
 549     (let ((exports (js2-export-node-exports-list export-node)))
 550       (should exports)
 551       (should (= 2 (length exports))))))
 552
 553 (js2-deftest export-variable-statement "export var foo = 'bar', baz = 'bang';"
 554   (js2-init-scanner)
 555   (js2-push-scope (make-js2-scope :pos 0))
 556   (should (js2-match-token js2-EXPORT))
 557   (let ((export-node (js2-parse-export)))
 558     (should export-node)
 559     (should (js2-export-node-declaration export-node))))
 560
 561 (js2-deftest export-const-declaration "export const PI = Math.PI;"
 562   (js2-init-scanner)
 563   (js2-push-scope (make-js2-scope :pos 0))
 564   (should (js2-match-token js2-EXPORT))
 565   (let ((export-node (js2-parse-export)))
 566     (should export-node)
 567     (should (js2-export-node-declaration export-node))))
 568
 569 (js2-deftest export-let-declaration "export let foo = [1];"
 570   (js2-init-scanner)
 571   (js2-push-scope (make-js2-scope :pos 0))
 572   (should (js2-match-token js2-EXPORT))
 573   (let ((export-node (js2-parse-export)))
 574     (should export-node)
 575     (should (js2-var-decl-node-p (js2-export-node-declaration export-node)))))
 576
 577 (js2-deftest export-class-declaration "export class Foo {};"
 578   (js2-init-scanner)
 579   (js2-push-scope (make-js2-scope :pos 0))
 580   (should (js2-match-token js2-EXPORT))
 581   (let ((export-node (js2-parse-export)))
 582     (should export-node)
 583     (should (js2-class-node-p (js2-export-node-declaration export-node)))))
 584
 585 (js2-deftest export-function-declaration "export default function doStuff() {};"
 586   (js2-init-scanner)
 587   (js2-push-scope (make-js2-scope :pos 0))
 588   (should (js2-match-token js2-EXPORT))
 589   (let ((export-node (js2-parse-export)))
 590     (should export-node)
 591     (should (js2-export-node-default export-node))))
 592
 593 (js2-deftest export-generator-declaration "export default function* one() {};"
 594   (js2-init-scanner)
 595   (js2-push-scope (make-js2-scope :pos 0))
 596   (should (js2-match-token js2-EXPORT))
 597   (let ((export-node (js2-parse-export)))
 598     (should export-node)
 599     (should (js2-export-node-default export-node))))
 600
 601 (js2-deftest export-assignment-expression "export default a = b;"
 602   (js2-init-scanner)
 603   (js2-push-scope (make-js2-scope :pos 0))
 604   (should (js2-match-token js2-EXPORT))
 605   (let ((export-node (js2-parse-export)))
 606     (should export-node)
 607     (should (js2-export-node-default export-node))))
 608
 609 (js2-deftest-parse parse-export-rexport "export * from 'other/lib';")
 610 (js2-deftest-parse parse-export-export-named-list "export {foo, bar as bang};")
 611 (js2-deftest-parse parse-re-export-named-list "export {foo, bar as bang} from 'other/lib';")
 612 (js2-deftest-parse parse-export-const-declaration "export const PI = Math.PI;")
 613 (js2-deftest-parse parse-export-let-declaration "export let foo = [1];")
 614 (js2-deftest-parse parse-export-function-declaration "export default function doStuff() {};")
 615 (js2-deftest-parse parse-export-generator-declaration "export default function* one() {};")
 616 (js2-deftest-parse parse-export-assignment-expression "export default a = b;")
 617
 618 ;;; Strings
 619
 620 (js2-deftest-parse string-literal
 621   "var x = 'y';")
 622
 623 (js2-deftest-parse object-get-string-literal
 624   "var x = {y: 5};\nvar z = x[\"y\"];")
 625
 626 (js2-deftest-parse template-no-substritutions
 627   "var x = `abc
 628             def`, y = `\\u0000`;")
 629
 630 (js2-deftest-parse template-with-substitutions
 631   "var y = `${a + b} ${d + e + f}`;")
 632
 633 (js2-deftest-parse tagged-template
 634   "foo.args`${++x, \"o\"}k`;")
 635
 636 ;;; Classes
 637
 638 (js2-deftest-parse parse-harmony-class-statement
 639   "class Foo {\n  get bar() {  return 42;\n}\n  set bar(x) {  y = x;\n}\n}")
 640
 641 (js2-deftest-parse parse-harmony-class-statement-without-name-is-not-ok
 642   "class {\n  get bar() {  return 42;\n}\n}"
 643   :syntax-error "{")
 644
 645 (js2-deftest-parse parse-harmony-class-expression
 646   "var Foo1 = class Foo {\n  bar() {  return 42;\n}\n};")
 647
 648 (js2-deftest-parse parse-harmony-anonymous-class-expression
 649   "var Foo = class {\n  set bar(x) {  bar = x;\n}\n};")
 650
 651 (js2-deftest-parse parse-harmony-class-with-extends
 652   "class Foo extends Bar {\n}")
 653
 654 (js2-deftest-parse parse-harmony-anonymous-class-with-extends
 655   "foo.Foo = class extends Bar {\n  set bar(x) {  bar = x;\n}\n};")
 656
 657 (js2-deftest-parse parse-harmony-class-with-complex-extends
 658   "class Foo extends foo[BAR][2].Baz {\n}")
 659
 660 (js2-deftest-parse parse-harmony-class-missing-extended-class-is-not-ok
 661   "class Foo extends {\n}"
 662   :syntax-error "extends")
 663
 664 (js2-deftest-parse parse-harmony-class-static-method
 665   "class Foo extends Bar {\n  static bar() {  return 42;\n}\n}")
 666
 667 (js2-deftest-parse parse-unterminated-class-is-not-okay
 668   "class Foo {\n  get bar() {  return 42;\n}"
 669   :syntax-error "}")
 670
 671 (js2-deftest-parse parse-super-keyword
 672   "class Foo {\n  constructor() {  super(42);\n}\n  foo() {  super.foo();\n}\n}")
 673
 674 ;;; Scopes
 675
 676 (js2-deftest ast-symbol-table-includes-fn-node "function foo() {}"
 677   (js2-mode)
 678   (let ((entry (js2-scope-get-symbol js2-mode-ast 'foo)))
 679     (should (= (js2-symbol-decl-type entry) js2-FUNCTION))
 680     (should (equal (js2-symbol-name entry) "foo"))
 681     (should (js2-function-node-p (js2-symbol-ast-node entry)))))
 682
 683 (js2-deftest fn-symbol-table-includes-nested-fn "function foo() {
 684   function bar() {}
 685   var x;
 686 }"
 687   (js2-mode)
 688   (let* ((scope (js2-node-at-point (point-min)))
 689          (fn-entry (js2-scope-get-symbol scope 'bar))
 690          (var-entry (js2-scope-get-symbol scope 'x)))
 691     (should (string= (js2-name-node-name (js2-function-node-name scope)) "foo"))
 692     (should (= (js2-symbol-decl-type fn-entry) js2-FUNCTION))
 693     (should (js2-function-node-p (js2-symbol-ast-node fn-entry)))
 694     (should (= (js2-symbol-decl-type var-entry) js2-VAR))
 695     (should (js2-name-node-p (js2-symbol-ast-node var-entry)))))
 696
 697 ;;; Tokenizer
 698
 699 (js2-deftest get-token "(1+1)"
 700   (js2-init-scanner)
 701   (should (eq js2-LP (js2-next-token)))
 702   (should (eq js2-NUMBER (js2-next-token)))
 703   (should (eq js2-ADD (js2-next-token)))
 704   (should (eq js2-NUMBER (js2-next-token)))
 705   (should (eq js2-RP (js2-next-token))))
 706
 707 (js2-deftest unget-token "()"
 708   (js2-init-scanner)
 709   (should (eq js2-LP (js2-next-token)))
 710   (js2-unget-token)
 711   (should (eq js2-LP (js2-next-token)))
 712   (should (eq js2-RP (js2-next-token))))
 713
 714 (js2-deftest get-token-or-eol "x\n++;"
 715   (js2-init-scanner)
 716   (should (eq js2-NAME (js2-next-token)))
 717   (should (eq js2-EOL (js2-peek-token-or-eol)))
 718   (should (eq js2-INC (js2-next-token)))
 719   (should (eq js2-SEMI (js2-peek-token-or-eol))))
 720
 721 (js2-deftest unget-token-over-eol-and-comment "x\n//abc\ny"
 722   (js2-init-scanner)
 723   (should (eq js2-NAME (js2-next-token)))
 724   (should (eq js2-NAME (js2-next-token)))
 725   (should (equal "y" (js2-current-token-string)))
 726   (js2-unget-token)
 727   (should (eq js2-NAME (js2-current-token-type)))
 728   (should (equal "x" (js2-current-token-string))))
 729
 730 (js2-deftest ts-seek "(1+2)"
 731   (js2-init-scanner)
 732   (should (eq js2-LP (js2-next-token)))
 733   (should (eq js2-NUMBER (js2-next-token)))
 734   (js2-unget-token)
 735   (let ((state (make-js2-ts-state)))
 736     (should (eq js2-NUMBER (js2-next-token)))
 737     (should (eq js2-ADD (js2-next-token)))
 738     (js2-ts-seek state)
 739     (should (eq 1 js2-ti-lookahead))
 740     (should (eq js2-NUMBER (js2-next-token)))
 741     (should (eq 1 (js2-token-number
 742                    (js2-current-token))))))
 743
 744 (js2-deftest get-token-template-literal "`abc ${i} z ${j} def`"
 745   (js2-init-scanner)
 746   (should (eq js2-TEMPLATE_HEAD (js2-next-token)))
 747   (should (equal "abc " (js2-current-token-string)))
 748   (should (eq js2-NAME (js2-next-token)))
 749   (should (eq js2-RC (js2-next-token)))
 750   (should (eq js2-TEMPLATE_HEAD (js2-next-token 'TEMPLATE_TAIL)))
 751   (should (equal " z " (js2-current-token-string)))
 752   (should (eq js2-NAME (js2-next-token)))
 753   (should (eq js2-RC (js2-next-token)))
 754   (should (eq js2-NO_SUBS_TEMPLATE (js2-next-token 'TEMPLATE_TAIL)))
 755   (should (equal " def" (js2-current-token-string))))
 756
 757 ;;; Error handling
 758
 759 (js2-deftest for-node-with-error-len "for "
 760   (js2-mode)
 761   (let ((node (js2-node-at-point (point-min))))
 762     (should (= (js2-node-len (js2-node-parent node)) 4))))
 763
 764 (js2-deftest function-without-parens-error "function b {}"
 765   ;; Should finish the parse.
 766   (js2-mode))