316 lines
11 KiB
Python
316 lines
11 KiB
Python
#!/usr/bin/env python3
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# Allow direct execution
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import os
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import sys
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import unittest
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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import math
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import re
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from yt_dlp.jsinterp import JS_Undefined, JSInterpreter
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class TestJSInterpreter(unittest.TestCase):
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def _test(self, code, ret, func='f', args=()):
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self.assertEqual(JSInterpreter(code).call_function(func, *args), ret)
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def test_basic(self):
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jsi = JSInterpreter('function f(){;}')
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self.assertEqual(repr(jsi.extract_function('f')), 'F<f>')
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self.assertEqual(jsi.call_function('f'), None)
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self._test('function f(){return 42;}', 42)
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self._test('function f(){42}', None)
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self._test('var f = function(){return 42;}', 42)
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def test_calc(self):
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self._test('function f(a){return 2*a+1;}', 7, args=[3])
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def test_empty_return(self):
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self._test('function f(){return; y()}', None)
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def test_morespace(self):
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self._test('function f (a) { return 2 * a + 1 ; }', 7, args=[3])
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self._test('function f () { x = 2 ; return x; }', 2)
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def test_strange_chars(self):
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self._test('function $_xY1 ($_axY1) { var $_axY2 = $_axY1 + 1; return $_axY2; }',
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21, args=[20], func='$_xY1')
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def test_operators(self):
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self._test('function f(){return 1 << 5;}', 32)
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self._test('function f(){return 2 ** 5}', 32)
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self._test('function f(){return 19 & 21;}', 17)
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self._test('function f(){return 11 >> 2;}', 2)
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self._test('function f(){return []? 2+3: 4;}', 5)
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self._test('function f(){return 1 == 2}', False)
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self._test('function f(){return 0 && 1 || 2;}', 2)
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self._test('function f(){return 0 ?? 42;}', 0)
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self._test('function f(){return "life, the universe and everything" < 42;}', False)
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def test_array_access(self):
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self._test('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2.0] = 7; return x;}', [5, 2, 7])
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def test_parens(self):
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self._test('function f(){return (1) + (2) * ((( (( (((((3)))))) )) ));}', 7)
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self._test('function f(){return (1 + 2) * 3;}', 9)
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def test_quotes(self):
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self._test(R'function f(){return "a\"\\("}', R'a"\(')
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def test_assignments(self):
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self._test('function f(){var x = 20; x = 30 + 1; return x;}', 31)
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self._test('function f(){var x = 20; x += 30 + 1; return x;}', 51)
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self._test('function f(){var x = 20; x -= 30 + 1; return x;}', -11)
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def test_comments(self):
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'Skipping: Not yet fully implemented'
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return
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self._test('''
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function f() {
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var x = /* 1 + */ 2;
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var y = /* 30
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* 40 */ 50;
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return x + y;
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}
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''', 52)
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self._test('''
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function f() {
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var x = "/*";
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var y = 1 /* comment */ + 2;
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return y;
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}
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''', 3)
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def test_precedence(self):
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self._test('''
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function f() {
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var a = [10, 20, 30, 40, 50];
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var b = 6;
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a[0]=a[b%a.length];
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return a;
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}
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''', [20, 20, 30, 40, 50])
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def test_builtins(self):
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jsi = JSInterpreter('function f() { return NaN }')
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self.assertTrue(math.isnan(jsi.call_function('f')))
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self._test('function f() { return new Date("Wednesday 31 December 1969 18:01:26 MDT") - 0; }',
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86000)
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self._test('function f(dt) { return new Date(dt) - 0; }',
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86000, args=['Wednesday 31 December 1969 18:01:26 MDT'])
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def test_call(self):
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jsi = JSInterpreter('''
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function x() { return 2; }
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function y(a) { return x() + (a?a:0); }
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function z() { return y(3); }
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''')
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self.assertEqual(jsi.call_function('z'), 5)
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self.assertEqual(jsi.call_function('y'), 2)
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def test_if(self):
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self._test('''
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function f() {
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let a = 9;
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if (0==0) {a++}
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return a
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}
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''', 10)
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self._test('''
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function f() {
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if (0==0) {return 10}
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}
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''', 10)
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self._test('''
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function f() {
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if (0!=0) {return 1}
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else {return 10}
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}
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''', 10)
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""" # Unsupported
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self._test('''
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function f() {
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if (0!=0) {return 1}
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else if (1==0) {return 2}
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else {return 10}
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}
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''', 10)
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"""
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def test_for_loop(self):
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self._test('function f() { a=0; for (i=0; i-10; i++) {a++} return a }', 10)
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def test_switch(self):
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jsi = JSInterpreter('''
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function f(x) { switch(x){
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case 1:x+=1;
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case 2:x+=2;
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case 3:x+=3;break;
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case 4:x+=4;
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default:x=0;
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} return x }
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''')
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self.assertEqual(jsi.call_function('f', 1), 7)
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self.assertEqual(jsi.call_function('f', 3), 6)
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self.assertEqual(jsi.call_function('f', 5), 0)
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def test_switch_default(self):
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jsi = JSInterpreter('''
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function f(x) { switch(x){
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case 2: x+=2;
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default: x-=1;
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case 5:
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case 6: x+=6;
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case 0: break;
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case 1: x+=1;
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} return x }
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''')
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self.assertEqual(jsi.call_function('f', 1), 2)
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self.assertEqual(jsi.call_function('f', 5), 11)
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self.assertEqual(jsi.call_function('f', 9), 14)
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def test_try(self):
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self._test('function f() { try{return 10} catch(e){return 5} }', 10)
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def test_catch(self):
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self._test('function f() { try{throw 10} catch(e){return 5} }', 5)
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def test_finally(self):
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self._test('function f() { try{throw 10} finally {return 42} }', 42)
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self._test('function f() { try{throw 10} catch(e){return 5} finally {return 42} }', 42)
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def test_nested_try(self):
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self._test('''
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function f() {try {
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try{throw 10} finally {throw 42}
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} catch(e){return 5} }
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''', 5)
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def test_for_loop_continue(self):
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self._test('function f() { a=0; for (i=0; i-10; i++) { continue; a++ } return a }', 0)
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def test_for_loop_break(self):
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self._test('function f() { a=0; for (i=0; i-10; i++) { break; a++ } return a }', 0)
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def test_for_loop_try(self):
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self._test('''
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function f() {
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for (i=0; i-10; i++) { try { if (i == 5) throw i} catch {return 10} finally {break} };
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return 42 }
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''', 42)
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def test_literal_list(self):
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self._test('function f() { return [1, 2, "asdf", [5, 6, 7]][3] }', [5, 6, 7])
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def test_comma(self):
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self._test('function f() { a=5; a -= 1, a+=3; return a }', 7)
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self._test('function f() { a=5; return (a -= 1, a+=3, a); }', 7)
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self._test('function f() { return (l=[0,1,2,3], function(a, b){return a+b})((l[1], l[2]), l[3]) }', 5)
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def test_void(self):
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self._test('function f() { return void 42; }', None)
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def test_return_function(self):
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jsi = JSInterpreter('''
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function f() { return [1, function(){return 1}][1] }
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''')
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self.assertEqual(jsi.call_function('f')([]), 1)
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def test_null(self):
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self._test('function f() { return null; }', None)
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self._test('function f() { return [null > 0, null < 0, null == 0, null === 0]; }',
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[False, False, False, False])
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self._test('function f() { return [null >= 0, null <= 0]; }', [True, True])
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def test_undefined(self):
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self._test('function f() { return undefined === undefined; }', True)
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self._test('function f() { return undefined; }', JS_Undefined)
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self._test('function f() {return undefined ?? 42; }', 42)
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self._test('function f() { let v; return v; }', JS_Undefined)
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self._test('function f() { let v; return v**0; }', 1)
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self._test('function f() { let v; return [v>42, v<=42, v&&42, 42&&v]; }',
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[False, False, JS_Undefined, JS_Undefined])
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self._test('''
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function f() { return [
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undefined === undefined,
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undefined == undefined,
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undefined == null,
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undefined < undefined,
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undefined > undefined,
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undefined === 0,
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undefined == 0,
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undefined < 0,
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undefined > 0,
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undefined >= 0,
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undefined <= 0,
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undefined > null,
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undefined < null,
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undefined === null
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]; }
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''', list(map(bool, (1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0))))
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jsi = JSInterpreter('''
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function f() { let v; return [42+v, v+42, v**42, 42**v, 0**v]; }
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''')
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for y in jsi.call_function('f'):
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self.assertTrue(math.isnan(y))
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def test_object(self):
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self._test('function f() { return {}; }', {})
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self._test('function f() { let a = {m1: 42, m2: 0 }; return [a["m1"], a.m2]; }', [42, 0])
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self._test('function f() { let a; return a?.qq; }', JS_Undefined)
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self._test('function f() { let a = {m1: 42, m2: 0 }; return a?.qq; }', JS_Undefined)
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def test_regex(self):
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self._test('function f() { let a=/,,[/,913,/](,)}/; }', None)
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jsi = JSInterpreter('function f() { let a=/,,[/,913,/](,)}/; return a; }')
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self.assertIsInstance(jsi.call_function('f'), re.Pattern)
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jsi = JSInterpreter('function f() { let a=/,,[/,913,/](,)}/i; return a; }')
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self.assertEqual(jsi.call_function('f').flags & re.I, re.I)
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jsi = JSInterpreter(R'function f() { let a=/,][}",],()}(\[)/; return a; }')
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self.assertEqual(jsi.call_function('f').pattern, r',][}",],()}(\[)')
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jsi = JSInterpreter(R'function f() { let a=[/[)\\]/]; return a[0]; }')
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self.assertEqual(jsi.call_function('f').pattern, r'[)\\]')
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def test_char_code_at(self):
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jsi = JSInterpreter('function f(i){return "test".charCodeAt(i)}')
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self.assertEqual(jsi.call_function('f', 0), 116)
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self.assertEqual(jsi.call_function('f', 1), 101)
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self.assertEqual(jsi.call_function('f', 2), 115)
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self.assertEqual(jsi.call_function('f', 3), 116)
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self.assertEqual(jsi.call_function('f', 4), None)
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self.assertEqual(jsi.call_function('f', 'not_a_number'), 116)
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def test_bitwise_operators_overflow(self):
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self._test('function f(){return -524999584 << 5}', 379882496)
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self._test('function f(){return 1236566549 << 5}', 915423904)
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def test_bitwise_operators_typecast(self):
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self._test('function f(){return null << 5}', 0)
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self._test('function f(){return undefined >> 5}', 0)
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self._test('function f(){return 42 << NaN}', 42)
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def test_negative(self):
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self._test('function f(){return 2 * -2.0 ;}', -4)
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self._test('function f(){return 2 - - -2 ;}', 0)
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self._test('function f(){return 2 - - - -2 ;}', 4)
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self._test('function f(){return 2 - + + - -2;}', 0)
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self._test('function f(){return 2 + - + - -2;}', 0)
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if __name__ == '__main__':
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unittest.main()
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