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 ;;; Object literals
 182
 183 (js2-deftest-parse object-literal-shorthand
 184   "var x = {a: 1, b, c: 1, d};")
 185
 186 (js2-deftest-parse object-literal-shorthard-with-number
 187   "var a = {1};" :syntax-error "}" :errors-count 2)
 188
 189 (js2-deftest-parse object-literal-method
 190   "var x = {f(y) {  return y;\n}};")
 191
 192 (js2-deftest-parse object-literal-getter-method
 193   "var x = {get f() {  return 42;\n}};")
 194
 195 (js2-deftest-parse object-literal-setter-method
 196   "var x = {set f(y) {  x = y;\n}};")
 197
 198 (js2-deftest-parse object-literal-computed-keys
 199   "var x = {[Symbol.iterator]: function() {}};")
 200
 201 ;;; Function definition
 202
 203 (js2-deftest function-redeclaring-var "var gen = 3; function gen() {};"
 204   (js2-mode)
 205   (should (= (length (js2-ast-root-warnings js2-mode-ast)) 1)))
 206
 207 (js2-deftest function-expression-var-same-name "var gen = function gen() {};"
 208   (js2-mode)
 209   (should (null (js2-ast-root-warnings js2-mode-ast))))
 210
 211 ;;; Function parameters
 212
 213 (js2-deftest-parse function-with-default-parameters
 214   "function foo(a = 1, b = a + 1) {\n}")
 215
 216 (js2-deftest-parse function-with-no-default-after-default
 217   "function foo(a = 1, b) {\n}"
 218   :syntax-error "b")
 219
 220 (js2-deftest-parse function-with-destruct-after-default
 221   "function foo(a = 1, {b, c}) {\n}"
 222   :syntax-error "{")
 223
 224 (js2-deftest-parse function-with-rest-parameter
 225   "function foo(a, b, ...rest) {\n}")
 226
 227 (js2-deftest-parse function-with-param-after-rest-parameter
 228   "function foo(a, ...b, rest) {\n}"
 229   :syntax-error "rest")
 230
 231 (js2-deftest-parse function-with-destruct-after-rest-parameter
 232   "function foo(a, ...b, {}) {\n}"
 233   :syntax-error "{}")
 234
 235 (js2-deftest-parse function-with-rest-after-default-parameter
 236   "function foo(a = 1, ...rest) {\n}")
 237
 238 ;;; Spread operator
 239
 240 (js2-deftest-parse spread-in-array-literal
 241   "[1, ...[2, 3], 4, ...[5, 6]];")
 242
 243 (js2-deftest-parse spread-in-function-call
 244   "f(3, ...[t(2), t(3)], 42, ...[t(4)]);")
 245
 246 ;;; Arrow functions
 247
 248 (js2-deftest-parse arrow-function-with-empty-args-and-no-curlies
 249   "() => false;" :reference "() => {false};")
 250
 251 (js2-deftest-parse arrow-function-with-args-and-curlies
 252   "(a, b = 1, ...c) => {  c;\n};")
 253
 254 (js2-deftest-parse arrow-function-with-destructuring
 255   "([{a}, b]) => {  a + b;\n};")
 256
 257 (js2-deftest-parse parenless-arrow-function-prohibits-rest
 258   "...b => {b + 1;};" :syntax-error "=>")
 259
 260 (js2-deftest-parse parenless-arrow-function-prohibits-destructuring
 261   "[a, b] => {a + b;};" :syntax-error "]" :errors-count 4)
 262
 263 (js2-deftest-parse arrow-function-recovers-from-error
 264   "[(,foo) => 1];" :syntax-error "," :errors-count 6)
 265
 266 ;;; Automatic semicolon insertion
 267
 268 (js2-deftest-parse no-auto-semi-insertion-after-if
 269   "if (true) {\n}")
 270
 271 (js2-deftest-parse auto-semi-insertion-after-function
 272   "a = function() {}" :reference "a = function() {};")
 273
 274 (js2-deftest-parse auto-semi-one-variable-per-line
 275   "x\ny" :reference "x;\ny;")
 276
 277 ;;; Labels
 278
 279 (js2-deftest-parse labeled-stmt-node
 280   "foo:\nbar:\nx = y + 1;")
 281
 282 (js2-deftest no-label-node-inside-expr "x = y:"
 283   (let (js2-parse-interruptable-p)
 284     (js2-mode))
 285   (let ((assignment (js2-expr-stmt-node-expr (car (js2-scope-kids js2-mode-ast)))))
 286     (should (js2-name-node-p (js2-assign-node-right assignment)))))
 287
 288 (js2-deftest-parse label-and-loops "for (; ; ) {
 289   loop:
 290   for (; ; ) {
 291     continue loop;
 292   }
 293 }")
 294
 295 ;;; Generators
 296
 297 (js2-deftest-parse legacy-generator "function foo() {\n  yield 1;\n}")
 298
 299 (js2-deftest-parse legacy-generator-cannot-return
 300   "function foo() {\n  yield 1;\n return 2;\n}" :syntax-error "return 2")
 301
 302 (js2-deftest-parse harmony-generator "function* bar() {\n  yield 2;\n  return 3;\n}")
 303
 304 (js2-deftest-parse harmony-generator-yield-star "(function*(a) {  yield* a;\n});")
 305
 306 ;;; Comprehensions
 307
 308 (js2-deftest-parse parse-legacy-array-comp-loop-with-filter
 309   "[a for (a in b) if (a == 2)];")
 310
 311 (js2-deftest-parse parse-array-comp-loop-with-filters
 312   "[for (a in b) if (a == 2) if (b != 10) a];")
 313
 314 (js2-deftest-parse parse-generator-comp-loop-with-filters
 315   "(for (x of y) if (x != 4) x);")
 316
 317 (js2-deftest-parse parse-array-comp-with-yield-is-ok
 318   "(function() {  return [for (x of []) yield x];\n});")
 319
 320 (js2-deftest-parse parse-generator-comp-with-yield-is-not-ok
 321   "(function() {  return (for (x of []) yield x);\n});"
 322   :syntax-error "yield")
 323
 324 (js2-deftest-parse parse-generator-comp-with-yield-inside-function-is-ok
 325   "(for (x of []) function*() {  yield x;\n});")
 326
 327 ;;; Numbers
 328
 329 (js2-deftest-parse decimal-starting-with-zero "081;" :reference "81;")
 330
 331 (js2-deftest-parse huge-hex "0x0123456789abcdefABCDEF;" :reference "-1;")
 332
 333 (js2-deftest-parse octal-without-o "071;" :reference "57;")
 334
 335 (js2-deftest-parse hex-number-okay "0x123;" :reference "291;")
 336
 337 (js2-deftest-parse hex-number-broken "0xz23;"
 338   :syntax-error "0xz" :errors-count 2)
 339
 340 (js2-deftest-parse binary-number-okay "0b101;" :reference "5;")
 341
 342 (js2-deftest-parse binary-number-broken "0b210;"
 343   :syntax-error "0b2" :errors-count 2)
 344
 345 (js2-deftest-parse octal-number-okay "0o765;" :reference "501;")
 346
 347 (js2-deftest-parse octal-number-broken "0o812;"
 348   :syntax-error "0o8" :errors-count 2)
 349
 350 ;;; Modules
 351
 352 (js2-deftest parse-export-bindings "{one, two as dos}"
 353   (js2-init-scanner)
 354   (should (js2-match-token js2-LC))
 355   (let ((imports (js2-parse-export-bindings)))
 356     (should (not (equal nil imports)))
 357     (should (= 2 (length imports)))
 358     (let ((first (nth 0 imports))
 359           (second (nth 1 imports)))
 360       (should (equal "one" (js2-name-node-name (js2-export-binding-node-extern-name first))))
 361       (should (equal "two" (js2-name-node-name (js2-export-binding-node-extern-name second))))
 362       (let ((first-name (js2-export-binding-node-local-name first))
 363             (second-name (js2-export-binding-node-local-name second)))
 364         (should (equal first (js2-node-parent first-name)))
 365         (should (equal 3 (js2-node-len first-name)))
 366         (should (equal "one" (js2-name-node-name first-name)))
 367         (should (equal second (js2-node-parent second-name)))
 368         (should (equal 3 (js2-node-len second-name)))
 369         (should (equal "dos" (js2-name-node-name second-name)))))))
 370
 371 (js2-deftest parse-export-binding-as-default "one as default"
 372   (js2-init-scanner)
 373   (let ((binding (js2-maybe-parse-export-binding)))
 374     (should binding)
 375     (should (js2-export-binding-node-p binding))
 376     (let ((name (js2-export-binding-node-local-name binding)))
 377       (should name)
 378       (should (equal "default" (js2-name-node-name name))))))
 379
 380 (js2-deftest parse-namepsace-import "* as lib;"
 381   (js2-init-scanner)
 382   (should (js2-match-token js2-MUL))
 383   (let ((namespace-import (js2-parse-namespace-import)))
 384     (should (not (equal nil namespace-import)))
 385     (should (js2-namespace-import-node-p namespace-import))
 386     (should (= 1 (js2-node-pos namespace-import)))
 387     (should (equal 8 (js2-node-len namespace-import)))
 388     (let ((name-node (js2-namespace-import-node-name namespace-import)))
 389       (should (equal "lib" (js2-name-node-name name-node)))
 390       (should (= 5 (js2-node-pos name-node))))))
 391
 392 (js2-deftest parse-from-clause "from 'foo/bar';"
 393   (js2-init-scanner)
 394   (let ((from (js2-parse-from-clause)))
 395     (should (not (equal nil from)))
 396     (should (= 1 (js2-node-pos from)))
 397     (should (= 14 (js2-node-len from)))
 398     (should (equal "foo/bar" (js2-from-clause-node-module-id from)))))
 399
 400 (js2-deftest parse-import-module-id-only "import 'src/lib'"
 401   (js2-init-scanner)
 402   (should (js2-match-token js2-IMPORT))
 403   (let ((import (js2-parse-import)))
 404     (should (not (equal nil import)))
 405     (should (= 1 (js2-node-pos import)))
 406     (should (= 16 (js2-node-len import)))
 407     (should (equal nil (js2-import-node-import import)))
 408     (should (equal nil (js2-import-node-from import)))))
 409
 410 (js2-deftest parse-imported-default-binding "import theDefault from 'src/lib'"
 411   (js2-push-scope (make-js2-scope :pos 0))
 412   (js2-init-scanner)
 413   (should (js2-match-token js2-IMPORT))
 414   (let ((import-node (js2-parse-import)))
 415     (should (not (equal nil import-node)))
 416     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 417     (let ((import (js2-import-node-import import-node)))
 418       (should (not (equal nil import)))
 419       (should (equal nil (js2-import-clause-node-namespace-import import)))
 420       (should (equal nil (js2-import-clause-node-named-imports import)))
 421       (let ((default (js2-import-clause-node-default-binding import)))
 422         (should (not (equal nil default)))
 423         (should (js2-export-binding-node-p default))
 424         (should (equal "theDefault" (js2-name-node-name (js2-export-binding-node-extern-name default)))))))
 425   (should (js2-scope-get-symbol js2-current-scope "theDefault")))
 426
 427 (js2-deftest parse-import-namespace-binding "import * as lib from 'src/lib'"
 428   (js2-push-scope (make-js2-scope :pos 0))
 429   (js2-init-scanner)
 430   (should (js2-match-token js2-IMPORT))
 431   (let ((import-node (js2-parse-import)))
 432     (should (not (equal nil import-node)))
 433     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 434     (let ((import (js2-import-node-import import-node)))
 435       (should (not (equal nil import)))
 436       (should (equal nil (js2-import-clause-node-default-binding import)))
 437       (should (equal nil (js2-import-clause-node-named-imports import)))
 438       (let ((ns-import (js2-import-clause-node-namespace-import import)))
 439         (should (not (equal nil ns-import)))
 440         (should (js2-namespace-import-node-p ns-import))
 441         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 442   (should (js2-scope-get-symbol js2-current-scope "lib")))
 443
 444 (js2-deftest parse-import-named-imports "import {foo as bar, baz} from 'src/lib'"
 445   (js2-push-scope (make-js2-scope :pos 0))
 446   (js2-init-scanner)
 447   (should (js2-match-token js2-IMPORT))
 448   (let ((import-node (js2-parse-import)))
 449     (should (not (equal nil import-node)))
 450     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 451     (let ((import (js2-import-node-import import-node)))
 452       (should (not (equal nil import)))
 453       (should (equal nil (js2-import-clause-node-default-binding import)))
 454       (should (equal nil (js2-import-clause-node-namespace-import import)))
 455       (let ((named-imports (js2-import-clause-node-named-imports import)))
 456         (should (not (equal nil named-imports)))
 457         (should (listp named-imports))
 458         (should (= 2 (length named-imports)))
 459         (let ((first (nth 0 named-imports))
 460               (second (nth 1 named-imports)))
 461           (should (equal "bar" (js2-name-node-name (js2-export-binding-node-local-name first))))
 462           (should (equal "baz" (js2-name-node-name (js2-export-binding-node-local-name second))))))))
 463   (should (js2-scope-get-symbol js2-current-scope "bar"))
 464   (should (js2-scope-get-symbol js2-current-scope "baz")))
 465
 466 (js2-deftest parse-import-default-and-namespace "import stuff, * as lib from 'src/lib'"
 467   (js2-push-scope (make-js2-scope :pos 0))
 468   (js2-init-scanner)
 469   (should (js2-match-token js2-IMPORT))
 470   (let ((import-node (js2-parse-import)))
 471     (should (not (equal nil import-node)))
 472     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 473     (let ((import (js2-import-node-import import-node)))
 474       (should (not (equal nil import)))
 475       (should (equal nil (js2-import-clause-node-named-imports import)))
 476       (let ((default (js2-import-clause-node-default-binding import))
 477             (ns-import (js2-import-clause-node-namespace-import import)))
 478         (should (not (equal nil default)))
 479         (should (equal "stuff" (js2-name-node-name (js2-export-binding-node-local-name default))))
 480         (should (not (equal nil ns-import)))
 481         (should (js2-namespace-import-node-p ns-import))
 482         (should (equal "lib" (js2-name-node-name (js2-namespace-import-node-name ns-import)))))))
 483   (should (js2-scope-get-symbol js2-current-scope "stuff"))
 484   (should (js2-scope-get-symbol js2-current-scope "lib")))
 485
 486 (js2-deftest parse-import-default-and-named-imports
 487   "import robert as bob, {cookies, pi as PIE} from 'src/lib'"
 488   (js2-push-scope (make-js2-scope :pos 0))
 489   (js2-init-scanner)
 490   (should (js2-match-token js2-IMPORT))
 491   (let ((import-node (js2-parse-import)))
 492     (should (not (equal nil import-node)))
 493     (should (equal "src/lib" (js2-import-node-module-id import-node)))
 494     (let ((import (js2-import-node-import import-node)))
 495       (should (not (equal nil import)))
 496       (should (not (equal nil (js2-import-clause-node-named-imports import))))
 497       (let ((default (js2-import-clause-node-default-binding import))
 498             (named-imports (js2-import-clause-node-named-imports import)))
 499         (should (not (equal nil default)))
 500         (should (equal "bob" (js2-name-node-name (js2-export-binding-node-local-name default))))
 501         (should (not (equal nil named-imports)))
 502         (should (= 2 (length named-imports))))))
 503   (should (js2-scope-get-symbol js2-current-scope "bob"))
 504   (should (js2-scope-get-symbol js2-current-scope "cookies"))
 505   (should (js2-scope-get-symbol js2-current-scope "PIE")))
 506
 507 (js2-deftest parse-this-module-in-from-clause "import {url} from this module;"
 508   (js2-push-scope (make-js2-scope :pos 0))
 509   (js2-init-scanner)
 510   (should (js2-match-token js2-IMPORT))
 511   (let ((import-node (js2-parse-import)))
 512     (should import-node)
 513     (let ((from-clause (js2-import-node-from import-node)))
 514       (should from-clause)
 515       (should (equal "this" (js2-from-clause-node-module-id from-clause)))
 516       (should (js2-from-clause-node-metadata-p from-clause)))))
 517
 518 (js2-deftest-parse import-only-for-side-effects "import 'src/lib';")
 519 (js2-deftest-parse import-default-only "import theDefault from 'src/lib';")
 520 (js2-deftest-parse import-named-only "import {one, two} from 'src/lib';")
 521 (js2-deftest-parse import-default-and-named "import theDefault, {one, two} from 'src/lib';")
 522 (js2-deftest-parse import-renaming-default "import * as lib from 'src/mylib';")
 523 (js2-deftest-parse import-renaming-named "import {one as uno, two as dos} from 'src/lib';")
 524 (js2-deftest-parse import-default-and-namespace "import robert as bob, * as lib from 'src/lib';")
 525 (js2-deftest-parse import-from-this-module "import {url} from this module;")
 526
 527 ;; Module Exports
 528
 529 (js2-deftest export-rexport "export * from 'other/lib'"
 530   (js2-init-scanner)
 531   (should (js2-match-token js2-EXPORT))
 532   (let ((export-node (js2-parse-export)))
 533     (should export-node)
 534     (should (js2-export-node-from-clause export-node))))
 535
 536 (js2-deftest export-export-named-list "export {foo, bar as bang};"
 537   (js2-init-scanner)
 538   (should (js2-match-token js2-EXPORT))
 539   (let ((export-node (js2-parse-export)))
 540     (should export-node)
 541     (let ((exports (js2-export-node-exports-list export-node)))
 542       (should exports)
 543       (should (= 2 (length exports))))))
 544
 545 (js2-deftest re-export-named-list "export {foo, bar as bang} from 'other/lib'"
 546   (js2-init-scanner)
 547   (should (js2-match-token js2-EXPORT))
 548   (let ((export-node (js2-parse-export)))
 549     (should export-node)
 550     (should (js2-export-node-from-clause export-node))
 551     (let ((exports (js2-export-node-exports-list export-node)))
 552       (should exports)
 553       (should (= 2 (length exports))))))
 554
 555 (js2-deftest export-variable-statement "export var foo = 'bar', baz = 'bang';"
 556   (js2-init-scanner)
 557   (js2-push-scope (make-js2-scope :pos 0))
 558   (should (js2-match-token js2-EXPORT))
 559   (let ((export-node (js2-parse-export)))
 560     (should export-node)
 561     (should (js2-export-node-declaration export-node))))
 562
 563 (js2-deftest export-const-declaration "export const PI = Math.PI;"
 564   (js2-init-scanner)
 565   (js2-push-scope (make-js2-scope :pos 0))
 566   (should (js2-match-token js2-EXPORT))
 567   (let ((export-node (js2-parse-export)))
 568     (should export-node)
 569     (should (js2-export-node-declaration export-node))))
 570
 571 (js2-deftest export-let-declaration "export let foo = [1];"
 572   (js2-init-scanner)
 573   (js2-push-scope (make-js2-scope :pos 0))
 574   (should (js2-match-token js2-EXPORT))
 575   (let ((export-node (js2-parse-export)))
 576     (should export-node)
 577     (should (js2-var-decl-node-p (js2-export-node-declaration export-node)))))
 578
 579 (js2-deftest export-class-declaration "export class Foo {};"
 580   (js2-init-scanner)
 581   (js2-push-scope (make-js2-scope :pos 0))
 582   (should (js2-match-token js2-EXPORT))
 583   (let ((export-node (js2-parse-export)))
 584     (should export-node)
 585     (should (js2-class-node-p (js2-export-node-declaration export-node)))))
 586
 587 (js2-deftest export-function-declaration "export default function doStuff() {};"
 588   (js2-init-scanner)
 589   (js2-push-scope (make-js2-scope :pos 0))
 590   (should (js2-match-token js2-EXPORT))
 591   (let ((export-node (js2-parse-export)))
 592     (should export-node)
 593     (should (js2-export-node-default export-node))))
 594
 595 (js2-deftest export-generator-declaration "export default function* one() {};"
 596   (js2-init-scanner)
 597   (js2-push-scope (make-js2-scope :pos 0))
 598   (should (js2-match-token js2-EXPORT))
 599   (let ((export-node (js2-parse-export)))
 600     (should export-node)
 601     (should (js2-export-node-default export-node))))
 602
 603 (js2-deftest export-assignment-expression "export default a = b;"
 604   (js2-init-scanner)
 605   (js2-push-scope (make-js2-scope :pos 0))
 606   (should (js2-match-token js2-EXPORT))
 607   (let ((export-node (js2-parse-export)))
 608     (should export-node)
 609     (should (js2-export-node-default export-node))))
 610
 611 (js2-deftest export-function-no-semicolon "export default function foo() {}"
 612   (js2-mode)
 613   (should (equal nil js2-parsed-warnings)))
 614 (js2-deftest export-default-function-no-semicolon "export function foo() {}"
 615   (js2-mode)
 616   (should (equal nil js2-parsed-warnings)))
 617 (js2-deftest export-anything-else-does-require-a-semicolon "export var obj = {}"
 618   (js2-mode)
 619   (should (not (equal nil js2-parsed-warnings))))
 620
 621 (js2-deftest-parse parse-export-rexport "export * from 'other/lib';")
 622 (js2-deftest-parse parse-export-export-named-list "export {foo, bar as bang};")
 623 (js2-deftest-parse parse-re-export-named-list "export {foo, bar as bang} from 'other/lib';")
 624 (js2-deftest-parse parse-export-const-declaration "export const PI = Math.PI;")
 625 (js2-deftest-parse parse-export-let-declaration "export let foo = [1];")
 626 (js2-deftest-parse parse-export-function-declaration "export default function doStuff() {};")
 627 (js2-deftest-parse parse-export-generator-declaration "export default function* one() {};")
 628 (js2-deftest-parse parse-export-assignment-expression "export default a = b;")
 629
 630 ;;; Strings
 631
 632 (js2-deftest-parse string-literal
 633   "var x = 'y';")
 634
 635 (js2-deftest-parse object-get-string-literal
 636   "var x = {y: 5};\nvar z = x[\"y\"];")
 637
 638 (js2-deftest-parse template-no-substritutions
 639   "var x = `abc
 640             def`, y = `\\u0000`;")
 641
 642 (js2-deftest-parse template-with-substitutions
 643   "var y = `${a + b} ${d + e + f}`;")
 644
 645 (js2-deftest-parse tagged-template
 646   "foo.args`${++x, \"o\"}k`;")
 647
 648 ;;; Classes
 649
 650 (js2-deftest-parse parse-harmony-class-statement
 651   "class Foo {\n  get bar() {  return 42;\n}\n  set bar(x) {  y = x;\n}\n}")
 652
 653 (js2-deftest-parse parse-harmony-class-statement-without-name-is-not-ok
 654   "class {\n  get bar() {  return 42;\n}\n}"
 655   :syntax-error "{")
 656
 657 (js2-deftest-parse parse-harmony-class-expression
 658   "var Foo1 = class Foo {\n  bar() {  return 42;\n}\n};")
 659
 660 (js2-deftest-parse parse-harmony-anonymous-class-expression
 661   "var Foo = class {\n  set bar(x) {  bar = x;\n}\n};")
 662
 663 (js2-deftest-parse parse-harmony-class-with-extends
 664   "class Foo extends Bar {\n}")
 665
 666 (js2-deftest-parse parse-harmony-anonymous-class-with-extends
 667   "foo.Foo = class extends Bar {\n  set bar(x) {  bar = x;\n}\n};")
 668
 669 (js2-deftest-parse parse-harmony-class-with-complex-extends
 670   "class Foo extends foo[BAR][2].Baz {\n}")
 671
 672 (js2-deftest-parse parse-harmony-class-missing-extended-class-is-not-ok
 673   "class Foo extends {\n}"
 674   :syntax-error "extends")
 675
 676 (js2-deftest-parse parse-harmony-class-static-method
 677   "class Foo extends Bar {\n  static bar() {  return 42;\n}\n}")
 678
 679 (js2-deftest-parse parse-unterminated-class-is-not-okay
 680   "class Foo {\n  get bar() {  return 42;\n}"
 681   :syntax-error "}")
 682
 683 (js2-deftest-parse parse-super-keyword
 684   "class Foo {\n  constructor() {  super(42);\n}\n  foo() {  super.foo();\n}\n}")
 685
 686 ;;; Scopes
 687
 688 (js2-deftest ast-symbol-table-includes-fn-node "function foo() {}"
 689   (js2-mode)
 690   (let ((entry (js2-scope-get-symbol js2-mode-ast 'foo)))
 691     (should (= (js2-symbol-decl-type entry) js2-FUNCTION))
 692     (should (equal (js2-symbol-name entry) "foo"))
 693     (should (js2-function-node-p (js2-symbol-ast-node entry)))))
 694
 695 (js2-deftest fn-symbol-table-includes-nested-fn "function foo() {
 696   function bar() {}
 697   var x;
 698 }"
 699   (js2-mode)
 700   (let* ((scope (js2-node-at-point (point-min)))
 701          (fn-entry (js2-scope-get-symbol scope 'bar))
 702          (var-entry (js2-scope-get-symbol scope 'x)))
 703     (should (string= (js2-name-node-name (js2-function-node-name scope)) "foo"))
 704     (should (= (js2-symbol-decl-type fn-entry) js2-FUNCTION))
 705     (should (js2-function-node-p (js2-symbol-ast-node fn-entry)))
 706     (should (= (js2-symbol-decl-type var-entry) js2-VAR))
 707     (should (js2-name-node-p (js2-symbol-ast-node var-entry)))))
 708
 709 ;;; Tokenizer
 710
 711 (js2-deftest get-token "(1+1)"
 712   (js2-init-scanner)
 713   (should (eq js2-LP (js2-next-token)))
 714   (should (eq js2-NUMBER (js2-next-token)))
 715   (should (eq js2-ADD (js2-next-token)))
 716   (should (eq js2-NUMBER (js2-next-token)))
 717   (should (eq js2-RP (js2-next-token))))
 718
 719 (js2-deftest unget-token "()"
 720   (js2-init-scanner)
 721   (should (eq js2-LP (js2-next-token)))
 722   (js2-unget-token)
 723   (should (eq js2-LP (js2-next-token)))
 724   (should (eq js2-RP (js2-next-token))))
 725
 726 (js2-deftest get-token-or-eol "x\n++;"
 727   (js2-init-scanner)
 728   (should (eq js2-NAME (js2-next-token)))
 729   (should (eq js2-EOL (js2-peek-token-or-eol)))
 730   (should (eq js2-INC (js2-next-token)))
 731   (should (eq js2-SEMI (js2-peek-token-or-eol))))
 732
 733 (js2-deftest unget-token-over-eol-and-comment "x\n//abc\ny"
 734   (js2-init-scanner)
 735   (should (eq js2-NAME (js2-next-token)))
 736   (should (eq js2-NAME (js2-next-token)))
 737   (should (equal "y" (js2-current-token-string)))
 738   (js2-unget-token)
 739   (should (eq js2-NAME (js2-current-token-type)))
 740   (should (equal "x" (js2-current-token-string))))
 741
 742 (js2-deftest ts-seek "(1+2)"
 743   (js2-init-scanner)
 744   (should (eq js2-LP (js2-next-token)))
 745   (should (eq js2-NUMBER (js2-next-token)))
 746   (js2-unget-token)
 747   (let ((state (make-js2-ts-state)))
 748     (should (eq js2-NUMBER (js2-next-token)))
 749     (should (eq js2-ADD (js2-next-token)))
 750     (js2-ts-seek state)
 751     (should (eq 1 js2-ti-lookahead))
 752     (should (eq js2-NUMBER (js2-next-token)))
 753     (should (eq 1 (js2-token-number
 754                    (js2-current-token))))))
 755
 756 (js2-deftest get-token-template-literal "`abc ${i} z ${j} def`"
 757   (js2-init-scanner)
 758   (should (eq js2-TEMPLATE_HEAD (js2-next-token)))
 759   (should (equal "abc " (js2-current-token-string)))
 760   (should (eq js2-NAME (js2-next-token)))
 761   (should (eq js2-RC (js2-next-token)))
 762   (should (eq js2-TEMPLATE_HEAD (js2-next-token 'TEMPLATE_TAIL)))
 763   (should (equal " z " (js2-current-token-string)))
 764   (should (eq js2-NAME (js2-next-token)))
 765   (should (eq js2-RC (js2-next-token)))
 766   (should (eq js2-NO_SUBS_TEMPLATE (js2-next-token 'TEMPLATE_TAIL)))
 767   (should (equal " def" (js2-current-token-string))))
 768
 769 ;;; Error handling
 770
 771 (js2-deftest for-node-with-error-len "for "
 772   (js2-mode)
 773   (let ((node (js2-node-at-point (point-min))))
 774     (should (= (js2-node-len (js2-node-parent node)) 4))))
 775
 776 (js2-deftest function-without-parens-error "function b {}"
 777   ;; Should finish the parse.
 778   (js2-mode))