1 #!/usr/bin/env python
2
3 from __future__ import unicode_literals
4
5 # Allow direct execution
6 import os
7 import sys
8 import unittest
9 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
10
11 import math
12 import re
13
14 from youtube_dl.compat import compat_re_Pattern
15
16 from youtube_dl.jsinterp import JS_Undefined, JSInterpreter
17
18
19 class TestJSInterpreter(unittest.TestCase):
20 def test_basic(self):
21 jsi = JSInterpreter('function x(){;}')
22 self.assertEqual(jsi.call_function('x'), None)
23
24 jsi = JSInterpreter('function x3(){return 42;}')
25 self.assertEqual(jsi.call_function('x3'), 42)
26
27 jsi = JSInterpreter('function x3(){42}')
28 self.assertEqual(jsi.call_function('x3'), None)
29
30 jsi = JSInterpreter('var x5 = function(){return 42;}')
31 self.assertEqual(jsi.call_function('x5'), 42)
32
33 def test_calc(self):
34 jsi = JSInterpreter('function x4(a){return 2*a+1;}')
35 self.assertEqual(jsi.call_function('x4', 3), 7)
36
37 def test_empty_return(self):
38 jsi = JSInterpreter('function f(){return; y()}')
39 self.assertEqual(jsi.call_function('f'), None)
40
41 def test_morespace(self):
42 jsi = JSInterpreter('function x (a) { return 2 * a + 1 ; }')
43 self.assertEqual(jsi.call_function('x', 3), 7)
44
45 jsi = JSInterpreter('function f () { x = 2 ; return x; }')
46 self.assertEqual(jsi.call_function('f'), 2)
47
48 def test_strange_chars(self):
49 jsi = JSInterpreter('function $_xY1 ($_axY1) { var $_axY2 = $_axY1 + 1; return $_axY2; }')
50 self.assertEqual(jsi.call_function('$_xY1', 20), 21)
51
52 def test_operators(self):
53 jsi = JSInterpreter('function f(){return 1 << 5;}')
54 self.assertEqual(jsi.call_function('f'), 32)
55
56 jsi = JSInterpreter('function f(){return 2 ** 5}')
57 self.assertEqual(jsi.call_function('f'), 32)
58
59 jsi = JSInterpreter('function f(){return 19 & 21;}')
60 self.assertEqual(jsi.call_function('f'), 17)
61
62 jsi = JSInterpreter('function f(){return 11 >> 2;}')
63 self.assertEqual(jsi.call_function('f'), 2)
64
65 jsi = JSInterpreter('function f(){return []? 2+3: 4;}')
66 self.assertEqual(jsi.call_function('f'), 5)
67
68 jsi = JSInterpreter('function f(){return 1 == 2}')
69 self.assertEqual(jsi.call_function('f'), False)
70
71 jsi = JSInterpreter('function f(){return 0 && 1 || 2;}')
72 self.assertEqual(jsi.call_function('f'), 2)
73
74 jsi = JSInterpreter('function f(){return 0 ?? 42;}')
75 self.assertEqual(jsi.call_function('f'), 0)
76
77 jsi = JSInterpreter('function f(){return "life, the universe and everything" < 42;}')
78 self.assertFalse(jsi.call_function('f'))
79
80 def test_array_access(self):
81 jsi = JSInterpreter('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2.0] = 7; return x;}')
82 self.assertEqual(jsi.call_function('f'), [5, 2, 7])
83
84 def test_parens(self):
85 jsi = JSInterpreter('function f(){return (1) + (2) * ((( (( (((((3)))))) )) ));}')
86 self.assertEqual(jsi.call_function('f'), 7)
87
88 jsi = JSInterpreter('function f(){return (1 + 2) * 3;}')
89 self.assertEqual(jsi.call_function('f'), 9)
90
91 def test_quotes(self):
92 jsi = JSInterpreter(r'function f(){return "a\"\\("}')
93 self.assertEqual(jsi.call_function('f'), r'a"\(')
94
95 def test_assignments(self):
96 jsi = JSInterpreter('function f(){var x = 20; x = 30 + 1; return x;}')
97 self.assertEqual(jsi.call_function('f'), 31)
98
99 jsi = JSInterpreter('function f(){var x = 20; x += 30 + 1; return x;}')
100 self.assertEqual(jsi.call_function('f'), 51)
101
102 jsi = JSInterpreter('function f(){var x = 20; x -= 30 + 1; return x;}')
103 self.assertEqual(jsi.call_function('f'), -11)
104
105 def test_comments(self):
106 'Skipping: Not yet fully implemented'
107 return
108 jsi = JSInterpreter('''
109 function x() {
110 var x = /* 1 + */ 2;
111 var y = /* 30
112 * 40 */ 50;
113 return x + y;
114 }
115 ''')
116 self.assertEqual(jsi.call_function('x'), 52)
117
118 jsi = JSInterpreter('''
119 function f() {
120 var x = "/*";
121 var y = 1 /* comment */ + 2;
122 return y;
123 }
124 ''')
125 self.assertEqual(jsi.call_function('f'), 3)
126
127 def test_precedence(self):
128 jsi = JSInterpreter('''
129 function x() {
130 var a = [10, 20, 30, 40, 50];
131 var b = 6;
132 a[0]=a[b%a.length];
133 return a;
134 }''')
135 self.assertEqual(jsi.call_function('x'), [20, 20, 30, 40, 50])
136
137 def test_builtins(self):
138 jsi = JSInterpreter('''
139 function x() { return NaN }
140 ''')
141 self.assertTrue(math.isnan(jsi.call_function('x')))
142
143 jsi = JSInterpreter('''
144 function x() { return new Date('Wednesday 31 December 1969 18:01:26 MDT') - 0; }
145 ''')
146 self.assertEqual(jsi.call_function('x'), 86000)
147 jsi = JSInterpreter('''
148 function x(dt) { return new Date(dt) - 0; }
149 ''')
150 self.assertEqual(jsi.call_function('x', 'Wednesday 31 December 1969 18:01:26 MDT'), 86000)
151
152 def test_call(self):
153 jsi = JSInterpreter('''
154 function x() { return 2; }
155 function y(a) { return x() + (a?a:0); }
156 function z() { return y(3); }
157 ''')
158 self.assertEqual(jsi.call_function('z'), 5)
159 self.assertEqual(jsi.call_function('y'), 2)
160
161 def test_for_loop(self):
162 # function x() { a=0; for (i=0; i-10; i++) {a++} a }
163 jsi = JSInterpreter('''
164 function x() { a=0; for (i=0; i-10; i++) {a++} return a }
165 ''')
166 self.assertEqual(jsi.call_function('x'), 10)
167
168 def test_switch(self):
169 jsi = JSInterpreter('''
170 function x(f) { switch(f){
171 case 1:f+=1;
172 case 2:f+=2;
173 case 3:f+=3;break;
174 case 4:f+=4;
175 default:f=0;
176 } return f }
177 ''')
178 self.assertEqual(jsi.call_function('x', 1), 7)
179 self.assertEqual(jsi.call_function('x', 3), 6)
180 self.assertEqual(jsi.call_function('x', 5), 0)
181
182 def test_switch_default(self):
183 jsi = JSInterpreter('''
184 function x(f) { switch(f){
185 case 2: f+=2;
186 default: f-=1;
187 case 5:
188 case 6: f+=6;
189 case 0: break;
190 case 1: f+=1;
191 } return f }
192 ''')
193 self.assertEqual(jsi.call_function('x', 1), 2)
194 self.assertEqual(jsi.call_function('x', 5), 11)
195 self.assertEqual(jsi.call_function('x', 9), 14)
196
197 def test_try(self):
198 jsi = JSInterpreter('''
199 function x() { try{return 10} catch(e){return 5} }
200 ''')
201 self.assertEqual(jsi.call_function('x'), 10)
202
203 def test_catch(self):
204 jsi = JSInterpreter('''
205 function x() { try{throw 10} catch(e){return 5} }
206 ''')
207 self.assertEqual(jsi.call_function('x'), 5)
208
209 def test_finally(self):
210 jsi = JSInterpreter('''
211 function x() { try{throw 10} finally {return 42} }
212 ''')
213 self.assertEqual(jsi.call_function('x'), 42)
214 jsi = JSInterpreter('''
215 function x() { try{throw 10} catch(e){return 5} finally {return 42} }
216 ''')
217 self.assertEqual(jsi.call_function('x'), 42)
218
219 def test_nested_try(self):
220 jsi = JSInterpreter('''
221 function x() {try {
222 try{throw 10} finally {throw 42}
223 } catch(e){return 5} }
224 ''')
225 self.assertEqual(jsi.call_function('x'), 5)
226
227 def test_for_loop_continue(self):
228 jsi = JSInterpreter('''
229 function x() { a=0; for (i=0; i-10; i++) { continue; a++ } return a }
230 ''')
231 self.assertEqual(jsi.call_function('x'), 0)
232
233 def test_for_loop_break(self):
234 jsi = JSInterpreter('''
235 function x() { a=0; for (i=0; i-10; i++) { break; a++ } return a }
236 ''')
237 self.assertEqual(jsi.call_function('x'), 0)
238
239 def test_for_loop_try(self):
240 jsi = JSInterpreter('''
241 function x() {
242 for (i=0; i-10; i++) { try { if (i == 5) throw i} catch {return 10} finally {break} };
243 return 42 }
244 ''')
245 self.assertEqual(jsi.call_function('x'), 42)
246
247 def test_literal_list(self):
248 jsi = JSInterpreter('''
249 function x() { return [1, 2, "asdf", [5, 6, 7]][3] }
250 ''')
251 self.assertEqual(jsi.call_function('x'), [5, 6, 7])
252
253 def test_comma(self):
254 jsi = JSInterpreter('''
255 function x() { a=5; a -= 1, a+=3; return a }
256 ''')
257 self.assertEqual(jsi.call_function('x'), 7)
258 jsi = JSInterpreter('''
259 function x() { a=5; return (a -= 1, a+=3, a); }
260 ''')
261 self.assertEqual(jsi.call_function('x'), 7)
262
263 jsi = JSInterpreter('''
264 function x() { return (l=[0,1,2,3], function(a, b){return a+b})((l[1], l[2]), l[3]) }
265 ''')
266 self.assertEqual(jsi.call_function('x'), 5)
267
268 def test_void(self):
269 jsi = JSInterpreter('''
270 function x() { return void 42; }
271 ''')
272 self.assertEqual(jsi.call_function('x'), None)
273
274 def test_return_function(self):
275 jsi = JSInterpreter('''
276 function x() { return [1, function(){return 1}][1] }
277 ''')
278 self.assertEqual(jsi.call_function('x')([]), 1)
279
280 def test_null(self):
281 jsi = JSInterpreter('''
282 function x() { return null; }
283 ''')
284 self.assertIs(jsi.call_function('x'), None)
285
286 jsi = JSInterpreter('''
287 function x() { return [null > 0, null < 0, null == 0, null === 0]; }
288 ''')
289 self.assertEqual(jsi.call_function('x'), [False, False, False, False])
290
291 jsi = JSInterpreter('''
292 function x() { return [null >= 0, null <= 0]; }
293 ''')
294 self.assertEqual(jsi.call_function('x'), [True, True])
295
296 def test_undefined(self):
297 jsi = JSInterpreter('''
298 function x() { return undefined === undefined; }
299 ''')
300 self.assertTrue(jsi.call_function('x'))
301
302 jsi = JSInterpreter('''
303 function x() { return undefined; }
304 ''')
305 self.assertIs(jsi.call_function('x'), JS_Undefined)
306
307 jsi = JSInterpreter('''
308 function x() { let v; return v; }
309 ''')
310 self.assertIs(jsi.call_function('x'), JS_Undefined)
311
312 jsi = JSInterpreter('''
313 function x() { return [undefined === undefined, undefined == undefined, undefined < undefined, undefined > undefined]; }
314 ''')
315 self.assertEqual(jsi.call_function('x'), [True, True, False, False])
316
317 jsi = JSInterpreter('''
318 function x() { return [undefined === 0, undefined == 0, undefined < 0, undefined > 0]; }
319 ''')
320 self.assertEqual(jsi.call_function('x'), [False, False, False, False])
321
322 jsi = JSInterpreter('''
323 function x() { return [undefined >= 0, undefined <= 0]; }
324 ''')
325 self.assertEqual(jsi.call_function('x'), [False, False])
326
327 jsi = JSInterpreter('''
328 function x() { return [undefined > null, undefined < null, undefined == null, undefined === null]; }
329 ''')
330 self.assertEqual(jsi.call_function('x'), [False, False, True, False])
331
332 jsi = JSInterpreter('''
333 function x() { return [undefined === null, undefined == null, undefined < null, undefined > null]; }
334 ''')
335 self.assertEqual(jsi.call_function('x'), [False, True, False, False])
336
337 jsi = JSInterpreter('''
338 function x() { let v; return [42+v, v+42, v**42, 42**v, 0**v]; }
339 ''')
340 for y in jsi.call_function('x'):
341 self.assertTrue(math.isnan(y))
342
343 jsi = JSInterpreter('''
344 function x() { let v; return v**0; }
345 ''')
346 self.assertEqual(jsi.call_function('x'), 1)
347
348 jsi = JSInterpreter('''
349 function x() { let v; return [v>42, v<=42, v&&42, 42&&v]; }
350 ''')
351 self.assertEqual(jsi.call_function('x'), [False, False, JS_Undefined, JS_Undefined])
352
353 jsi = JSInterpreter('function x(){return undefined ?? 42; }')
354 self.assertEqual(jsi.call_function('x'), 42)
355
356 def test_object(self):
357 jsi = JSInterpreter('''
358 function x() { return {}; }
359 ''')
360 self.assertEqual(jsi.call_function('x'), {})
361
362 jsi = JSInterpreter('''
363 function x() { let a = {m1: 42, m2: 0 }; return [a["m1"], a.m2]; }
364 ''')
365 self.assertEqual(jsi.call_function('x'), [42, 0])
366
367 jsi = JSInterpreter('''
368 function x() { let a; return a?.qq; }
369 ''')
370 self.assertIs(jsi.call_function('x'), JS_Undefined)
371
372 jsi = JSInterpreter('''
373 function x() { let a = {m1: 42, m2: 0 }; return a?.qq; }
374 ''')
375 self.assertIs(jsi.call_function('x'), JS_Undefined)
376
377 def test_regex(self):
378 jsi = JSInterpreter('''
379 function x() { let a=/,,[/,913,/](,)}/; }
380 ''')
381 self.assertIs(jsi.call_function('x'), None)
382
383 jsi = JSInterpreter('''
384 function x() { let a=/,,[/,913,/](,)}/; return a; }
385 ''')
386 self.assertIsInstance(jsi.call_function('x'), compat_re_Pattern)
387
388 jsi = JSInterpreter('''
389 function x() { let a=/,,[/,913,/](,)}/i; return a; }
390 ''')
391 self.assertEqual(jsi.call_function('x').flags & ~re.U, re.I)
392
393 def test_char_code_at(self):
394 jsi = JSInterpreter('function x(i){return "test".charCodeAt(i)}')
395 self.assertEqual(jsi.call_function('x', 0), 116)
396 self.assertEqual(jsi.call_function('x', 1), 101)
397 self.assertEqual(jsi.call_function('x', 2), 115)
398 self.assertEqual(jsi.call_function('x', 3), 116)
399 self.assertEqual(jsi.call_function('x', 4), None)
400 self.assertEqual(jsi.call_function('x', 'not_a_number'), 116)
401
402 def test_bitwise_operators_overflow(self):
403 jsi = JSInterpreter('function x(){return -524999584 << 5}')
404 self.assertEqual(jsi.call_function('x'), 379882496)
405
406 jsi = JSInterpreter('function x(){return 1236566549 << 5}')
407 self.assertEqual(jsi.call_function('x'), 915423904)
408
409
410 if __name__ == '__main__':
411 unittest.main()
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