From b0a60ce2032172aeaaf27fe3866ab72768f10cb2 Mon Sep 17 00:00:00 2001 From: dirkf Date: Wed, 17 Aug 2022 14:22:02 +0100 Subject: [jsinterp] Improve JS language support (#31175) * operator ?? * operator ?. * operator ** * accurate operator functions * `undefined` handling * object literals {a: 1, "b": expr} * more tests for weird JS comparisons: see https://github.com/ytdl-org/youtube-dl/issues/31173#issuecomment-1217854397. --- test/test_jsinterp.py | 114 +++++++++++++++++++++++++++++++++++++++++ test/test_youtube_signature.py | 4 ++ 2 files changed, 118 insertions(+) (limited to 'test') diff --git a/test/test_jsinterp.py b/test/test_jsinterp.py index c6c931743..328941e09 100644 --- a/test/test_jsinterp.py +++ b/test/test_jsinterp.py @@ -8,7 +8,10 @@ import sys import unittest sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) +import math + from youtube_dl.jsinterp import JSInterpreter +undefined = JSInterpreter.undefined class TestJSInterpreter(unittest.TestCase): @@ -48,6 +51,9 @@ class TestJSInterpreter(unittest.TestCase): jsi = JSInterpreter('function f(){return 1 << 5;}') self.assertEqual(jsi.call_function('f'), 32) + jsi = JSInterpreter('function f(){return 2 ** 5}') + self.assertEqual(jsi.call_function('f'), 32) + jsi = JSInterpreter('function f(){return 19 & 21;}') self.assertEqual(jsi.call_function('f'), 17) @@ -57,6 +63,15 @@ class TestJSInterpreter(unittest.TestCase): jsi = JSInterpreter('function f(){return []? 2+3: 4;}') self.assertEqual(jsi.call_function('f'), 5) + jsi = JSInterpreter('function f(){return 1 == 2}') + self.assertEqual(jsi.call_function('f'), False) + + jsi = JSInterpreter('function f(){return 0 && 1 || 2;}') + self.assertEqual(jsi.call_function('f'), 2) + + jsi = JSInterpreter('function f(){return 0 ?? 42;}') + self.assertEqual(jsi.call_function('f'), 0) + def test_array_access(self): jsi = JSInterpreter('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2.0] = 7; return x;}') self.assertEqual(jsi.call_function('f'), [5, 2, 7]) @@ -203,6 +218,11 @@ class TestJSInterpreter(unittest.TestCase): ''') self.assertEqual(jsi.call_function('x'), 7) + jsi = JSInterpreter(''' + function x() { return (l=[0,1,2,3], function(a, b){return a+b})((l[1], l[2]), l[3]) } + ''') + self.assertEqual(jsi.call_function('x'), 5) + def test_void(self): jsi = JSInterpreter(''' function x() { return void 42; } @@ -215,6 +235,100 @@ class TestJSInterpreter(unittest.TestCase): ''') self.assertEqual(jsi.call_function('x')([]), 1) + def test_null(self): + jsi = JSInterpreter(''' + function x() { return null; } + ''') + self.assertIs(jsi.call_function('x'), None) + + jsi = JSInterpreter(''' + function x() { return [null > 0, null < 0, null == 0, null === 0]; } + ''') + self.assertEqual(jsi.call_function('x'), [False, False, False, False]) + + jsi = JSInterpreter(''' + function x() { return [null >= 0, null <= 0]; } + ''') + self.assertEqual(jsi.call_function('x'), [True, True]) + + def test_undefined(self): + jsi = JSInterpreter(''' + function x() { return undefined === undefined; } + ''') + self.assertTrue(jsi.call_function('x')) + + jsi = JSInterpreter(''' + function x() { return undefined; } + ''') + self.assertIs(jsi.call_function('x'), undefined) + + jsi = JSInterpreter(''' + function x() { let v; return v; } + ''') + self.assertIs(jsi.call_function('x'), undefined) + + jsi = JSInterpreter(''' + function x() { return [undefined === undefined, undefined == undefined, undefined < undefined, undefined > undefined]; } + ''') + self.assertEqual(jsi.call_function('x'), [True, True, False, False]) + + jsi = JSInterpreter(''' + function x() { return [undefined === 0, undefined == 0, undefined < 0, undefined > 0]; } + ''') + self.assertEqual(jsi.call_function('x'), [False, False, False, False]) + + jsi = JSInterpreter(''' + function x() { return [undefined >= 0, undefined <= 0]; } + ''') + self.assertEqual(jsi.call_function('x'), [False, False]) + + jsi = JSInterpreter(''' + function x() { return [undefined > null, undefined < null, undefined == null, undefined === null]; } + ''') + self.assertEqual(jsi.call_function('x'), [False, False, True, False]) + + jsi = JSInterpreter(''' + function x() { return [undefined === null, undefined == null, undefined < null, undefined > null]; } + ''') + self.assertEqual(jsi.call_function('x'), [False, True, False, False]) + + jsi = JSInterpreter(''' + function x() { let v; return [42+v, v+42, v**42, 42**v, 0**v]; } + ''') + for y in jsi.call_function('x'): + self.assertTrue(math.isnan(y)) + + jsi = JSInterpreter(''' + function x() { let v; return v**0; } + ''') + self.assertEqual(jsi.call_function('x'), 1) + + jsi = JSInterpreter(''' + function x() { let v; return [v>42, v<=42, v&&42, 42&&v]; } + ''') + self.assertEqual(jsi.call_function('x'), [False, False, undefined, undefined]) + + jsi = JSInterpreter('function x(){return undefined ?? 42; }') + self.assertEqual(jsi.call_function('x'), 42) + + def test_object(self): + jsi = JSInterpreter(''' + function x() { return {}; } + ''') + self.assertEqual(jsi.call_function('x'), {}) + jsi = JSInterpreter(''' + function x() { let a = {m1: 42, m2: 0 }; return [a["m1"], a.m2]; } + ''') + self.assertEqual(jsi.call_function('x'), [42, 0]) + jsi = JSInterpreter(''' + function x() { let a; return a?.qq; } + ''') + self.assertIs(jsi.call_function('x'), undefined) + jsi = JSInterpreter(''' + function x() { let a = {m1: 42, m2: 0 }; return a?.qq; } + ''') + self.assertIs(jsi.call_function('x'), undefined) + if __name__ == '__main__': unittest.main() diff --git a/test/test_youtube_signature.py b/test/test_youtube_signature.py index 6e955e0f0..4d756dad3 100644 --- a/test/test_youtube_signature.py +++ b/test/test_youtube_signature.py @@ -102,6 +102,10 @@ _NSIG_TESTS = [ 'https://www.youtube.com/s/player/4c3f79c5/player_ias.vflset/en_US/base.js', 'TDCstCG66tEAO5pR9o', 'dbxNtZ14c-yWyw', ), + ( + 'https://www.youtube.com/s/player/c81bbb4a/player_ias.vflset/en_US/base.js', + 'gre3EcLurNY2vqp94', 'Z9DfGxWP115WTg', + ), ] -- cgit v1.2.3