1 ;;; tests/parser.el --- Some tests for js2-mode.
3 ;; Copyright (C) 2009, 2011-2013 Free Software Foundation, Inc.
5 ;; This file is part of GNU Emacs.
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.
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.
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/>.
26 (defmacro js2-deftest (name buffer-contents &rest body)
27 `(ert-deftest ,(intern (format "js2-%s" name)) ()
30 (insert ,buffer-contents))
34 (fundamental-mode)))))
36 (put 'js2-deftest 'lisp-indent-function 'defun)
38 (defun js2-test-string-to-ast (s)
39 (ert-with-test-buffer (:name 'origin)
42 (should (null js2-mode-buffer-dirty-p))
45 (defun* js2-test-parse-string (code-string &key syntax-error errors-count
47 (let ((ast (js2-test-string-to-ast code-string)))
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)
57 (skip-chars-backward " \t\n")
58 (should (string= (or reference code-string)
59 (buffer-substring-no-properties
60 (point-min) (point))))))))
62 (defmacro* js2-deftest-parse (name code-string &key bind syntax-error errors-count
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
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))))
77 (put 'js2-deftest-parse 'lisp-indent-function 'defun)
81 (js2-deftest-parse variable-assignment
84 (js2-deftest-parse empty-object-literal
87 (js2-deftest-parse empty-array-literal
90 (js2-deftest-parse array-with-missing-elements
93 (js2-deftest-parse comma-after-regexp
96 (js2-deftest-parse return-statement
97 "function foo() {\n return 2;\n}")
99 (js2-deftest-parse function-statement
100 "function foo() {\n}")
102 (js2-deftest-parse function-statement-inside-block
103 "if (true) {\n function foo() {\n }\n}")
105 (js2-deftest-parse function-expression-statements-are-verboten
106 "function() {}" :syntax-error "(")
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)))
112 (js2-deftest-parse named-function-expression
113 "a = function b() {};")
115 (js2-deftest-parse parenthesized-expression
118 ;;; Callers of `js2-valid-prop-name-token'
120 (js2-deftest-parse parse-property-access-when-not-keyword
123 (js2-deftest-parse parse-property-access-when-keyword
125 :bind ((js2-allow-keywords-as-property-names t)))
127 (js2-deftest-parse parse-property-access-when-keyword-no-xml
129 :bind ((js2-allow-keywords-as-property-names t)
130 (js2-compiler-xml-available nil)))
132 (js2-deftest-parse parse-object-literal-when-not-keyword
135 (js2-deftest-parse parse-object-literal-when-keyword
137 :bind ((js2-allow-keywords-as-property-names t)))
139 ;;; 'of' contextual keyword
141 (js2-deftest-parse parse-legacy-array-comp-loop-with-of
142 "[a for (a of [])];")
144 (js2-deftest-parse parse-array-comp-loop
145 "[for (a of []) a];")
147 (js2-deftest-parse parse-for-of
148 "for (var a of []) {\n}")
150 (js2-deftest-parse of-can-be-var-name
153 (js2-deftest-parse of-can-be-function-name
154 "function of() {\n}")
156 ;;; Destructuring binding
158 (js2-deftest-parse destruct-in-declaration
159 "var {a, b} = {a: 1, b: 2};")
161 (js2-deftest-parse destruct-in-arguments
162 "function f({a: aa, b: bb}) {\n}")
164 (js2-deftest-parse destruct-in-array-comp-loop
165 "[a + b for ([a, b] in [[0, 1], [1, 2]])];")
167 (js2-deftest-parse destruct-in-catch-clause
168 "try {\n} catch ({a, b}) {\n a + b;\n}")
170 ;;; Function parameters
172 (js2-deftest-parse function-with-default-parameters
173 "function foo(a = 1, b = a + 1) {\n}")
175 (js2-deftest-parse function-with-no-default-after-default
176 "function foo(a = 1, b) {\n}"
179 (js2-deftest-parse function-with-destruct-after-default
180 "function foo(a = 1, {b, c}) {\n}"
183 (js2-deftest-parse function-with-rest-parameter
184 "function foo(a, b, ...rest) {\n}")
186 (js2-deftest-parse function-with-param-after-rest-parameter
187 "function foo(a, ...b, rest) {\n}"
188 :syntax-error "rest")
190 (js2-deftest-parse function-with-destruct-after-rest-parameter
191 "function foo(a, ...b, {}) {\n}"
194 (js2-deftest-parse function-with-rest-after-default-parameter
195 "function foo(a = 1, ...rest) {\n}")
199 (js2-deftest-parse spread-in-array-literal
200 "[1, ...[2, 3], 4, ...[5, 6]];")
202 (js2-deftest-parse spread-in-function-call
203 "f(3, ...[t(2), t(3)], 42, ...[t(4)]);")
207 (js2-deftest-parse arrow-function-with-empty-args-and-no-curlies
208 "() => false;" :reference "() => {false};")
210 (js2-deftest-parse arrow-function-with-args-and-curlies
211 "(a, b = 1, ...c) => { c;\n};")
213 (js2-deftest-parse parenless-arrow-function-prohibits-rest
214 "...b => {b + 1;};" :syntax-error "=>" :errors-count 2)
216 (js2-deftest-parse parenless-arrow-function-prohibits-destructuring
217 "[a, b] => {a + b;};" :syntax-error "=>" :errors-count 5)
219 ;;; Automatic semicolon insertion
221 (js2-deftest-parse no-auto-semi-insertion-after-if
224 (js2-deftest-parse auto-semi-insertion-after-function
225 "a = function() {}" :reference "a = function() {};")
227 (js2-deftest-parse auto-semi-one-variable-per-line
228 "x\ny" :reference "x;\ny;")
232 (js2-deftest-parse labeled-stmt-node
233 "foo:\nbar:\nx = y + 1;")
235 (js2-deftest no-label-node-inside-expr "x = y:"
236 (let (js2-parse-interruptable-p)
238 (let ((assignment (js2-expr-stmt-node-expr (car (js2-scope-kids js2-mode-ast)))))
239 (should (js2-name-node-p (js2-assign-node-right assignment)))))
241 (js2-deftest-parse label-and-loops "for (; ; ) {
250 (js2-deftest-parse legacy-generator "function foo() {\n yield 1;\n}")
252 (js2-deftest-parse legacy-generator-cannot-return
253 "function foo() {\n yield 1;\n return 2;\n}" :syntax-error "return 2")
255 (js2-deftest-parse harmony-generator "function* bar() {\n yield 2;\n return 3;\n}")
257 (js2-deftest-parse harmony-generator-yield-star "(function*(a) { yield* a;\n});")
261 (js2-deftest-parse parse-legacy-array-comp-loop-with-filter
262 "[a for (a in b) if (a == 2)];")
264 (js2-deftest-parse parse-array-comp-loop-with-filters
265 "[for (a in b) if (a == 2) if (b != 10) a];")
267 (js2-deftest-parse parse-generator-comp-loop-with-filters
268 "(for (x of y) if (x != 4) x);")
270 (js2-deftest-parse parse-array-comp-with-yield-is-ok
271 "(function() { return [for (x of []) yield x];\n});")
273 (js2-deftest-parse parse-generator-comp-with-yield-is-not-ok
274 "(function() { return (for (x of []) yield x);\n});"
275 :syntax-error "yield")
277 (js2-deftest-parse parse-generator-comp-with-yield-inside-function-is-ok
278 "(for (x of []) function*() { yield x;\n});")
282 (js2-deftest-parse decimal-starting-with-zero "081;" :reference "81;")
284 (js2-deftest-parse huge-hex "0x0123456789abcdefABCDEF;" :reference "-1;")
286 (js2-deftest-parse octal-without-o "071;" :reference "57;")
288 (js2-deftest-parse hex-number-okay "0x123;" :reference "291;")
290 (js2-deftest-parse hex-number-broken "0xz23;"
291 :syntax-error "0xz" :errors-count 2)
293 (js2-deftest-parse binary-number-okay "0b101;" :reference "5;")
295 (js2-deftest-parse binary-number-broken "0b210;"
296 :syntax-error "0b2" :errors-count 2)
298 (js2-deftest-parse octal-number-okay "0o765;" :reference "501;")
300 (js2-deftest-parse octal-number-broken "0o812;"
301 :syntax-error "0o8" :errors-count 2)
305 (js2-deftest ast-symbol-table-includes-fn-node "function foo() {}"
307 (let ((entry (js2-scope-get-symbol js2-mode-ast 'foo)))
308 (should (= (js2-symbol-decl-type entry) js2-FUNCTION))
309 (should (equal (js2-symbol-name entry) "foo"))
310 (should (js2-function-node-p (js2-symbol-ast-node entry)))))
312 (js2-deftest fn-symbol-table-includes-nested-fn "function foo() {
317 (let* ((scope (js2-node-at-point (point-min)))
318 (fn-entry (js2-scope-get-symbol scope 'bar))
319 (var-entry (js2-scope-get-symbol scope 'x)))
320 (should (string= (js2-name-node-name (js2-function-node-name scope)) "foo"))
321 (should (= (js2-symbol-decl-type fn-entry) js2-FUNCTION))
322 (should (js2-function-node-p (js2-symbol-ast-node fn-entry)))
323 (should (= (js2-symbol-decl-type var-entry) js2-VAR))
324 (should (js2-name-node-p (js2-symbol-ast-node var-entry)))))
328 (js2-deftest get-token "(1+1)"
330 (should (eq js2-LP (js2-next-token)))
331 (should (eq js2-NUMBER (js2-next-token)))
332 (should (eq js2-ADD (js2-next-token)))
333 (should (eq js2-NUMBER (js2-next-token)))
334 (should (eq js2-RP (js2-next-token))))
336 (js2-deftest unget-token "()"
338 (should (eq js2-LP (js2-next-token)))
340 (should (eq js2-LP (js2-next-token)))
341 (should (eq js2-RP (js2-next-token))))
343 (js2-deftest get-token-or-eol "x\n++;"
345 (should (eq js2-NAME (js2-next-token)))
346 (should (eq js2-EOL (js2-peek-token-or-eol)))
347 (should (eq js2-INC (js2-next-token)))
348 (should (eq js2-SEMI (js2-peek-token-or-eol))))
350 (js2-deftest unget-token-over-eol-and-comment "x\n//abc\ny"
352 (should (eq js2-NAME (js2-next-token)))
353 (should (eq js2-NAME (js2-next-token)))
354 (should (equal "y" (js2-current-token-string)))
356 (should (eq js2-NAME (js2-current-token-type)))
357 (should (equal "x" (js2-current-token-string))))
359 (js2-deftest ts-seek "(1+2)"
361 (should (eq js2-LP (js2-next-token)))
362 (should (eq js2-NUMBER (js2-next-token)))
364 (let ((state (make-js2-ts-state)))
365 (should (eq js2-NUMBER (js2-next-token)))
366 (should (eq js2-ADD (js2-next-token)))
368 (should (eq 1 js2-ti-lookahead))
369 (should (eq js2-NUMBER (js2-next-token)))
370 (should (eq 1 (js2-token-number
371 (js2-current-token))))))
375 (js2-deftest for-node-with-error-len "for "
377 (let ((node (js2-node-at-point (point-min))))
378 (should (= (js2-node-len (js2-node-parent node)) 4))))
380 (js2-deftest function-without-parens-error "function b {}"
381 ;; Should finish the parse.