test/test_jsinterp.py

   1 #!/usr/bin/env python3
   2 # Allow direct execution
   3 import os
   4 import sys
   5 import unittest
   6
   7 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
   8
   9 from yt_dlp.jsinterp import JSInterpreter
  10
  11
  12 class TestJSInterpreter(unittest.TestCase):
  13     def test_basic(self):
  14         jsi = JSInterpreter('function x(){;}')
  15         self.assertEqual(jsi.call_function('x'), None)
  16
  17         jsi = JSInterpreter('function x3(){return 42;}')
  18         self.assertEqual(jsi.call_function('x3'), 42)
  19
  20         jsi = JSInterpreter('var x5 = function(){return 42;}')
  21         self.assertEqual(jsi.call_function('x5'), 42)
  22
  23     def test_calc(self):
  24         jsi = JSInterpreter('function x4(a){return 2*a+1;}')
  25         self.assertEqual(jsi.call_function('x4', 3), 7)
  26
  27     def test_empty_return(self):
  28         jsi = JSInterpreter('function f(){return; y()}')
  29         self.assertEqual(jsi.call_function('f'), None)
  30
  31     def test_morespace(self):
  32         jsi = JSInterpreter('function x (a) { return 2 * a + 1 ; }')
  33         self.assertEqual(jsi.call_function('x', 3), 7)
  34
  35         jsi = JSInterpreter('function f () { x =  2  ; return x; }')
  36         self.assertEqual(jsi.call_function('f'), 2)
  37
  38     def test_strange_chars(self):
  39         jsi = JSInterpreter('function $_xY1 ($_axY1) { var $_axY2 = $_axY1 + 1; return $_axY2; }')
  40         self.assertEqual(jsi.call_function('$_xY1', 20), 21)
  41
  42     def test_operators(self):
  43         jsi = JSInterpreter('function f(){return 1 << 5;}')
  44         self.assertEqual(jsi.call_function('f'), 32)
  45
  46         jsi = JSInterpreter('function f(){return 19 & 21;}')
  47         self.assertEqual(jsi.call_function('f'), 17)
  48
  49         jsi = JSInterpreter('function f(){return 11 >> 2;}')
  50         self.assertEqual(jsi.call_function('f'), 2)
  51
  52     def test_array_access(self):
  53         jsi = JSInterpreter('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2] = 7; return x;}')
  54         self.assertEqual(jsi.call_function('f'), [5, 2, 7])
  55
  56     def test_parens(self):
  57         jsi = JSInterpreter('function f(){return (1) + (2) * ((( (( (((((3)))))) )) ));}')
  58         self.assertEqual(jsi.call_function('f'), 7)
  59
  60         jsi = JSInterpreter('function f(){return (1 + 2) * 3;}')
  61         self.assertEqual(jsi.call_function('f'), 9)
  62
  63     def test_assignments(self):
  64         jsi = JSInterpreter('function f(){var x = 20; x = 30 + 1; return x;}')
  65         self.assertEqual(jsi.call_function('f'), 31)
  66
  67         jsi = JSInterpreter('function f(){var x = 20; x += 30 + 1; return x;}')
  68         self.assertEqual(jsi.call_function('f'), 51)
  69
  70         jsi = JSInterpreter('function f(){var x = 20; x -= 30 + 1; return x;}')
  71         self.assertEqual(jsi.call_function('f'), -11)
  72
  73     def test_comments(self):
  74         'Skipping: Not yet fully implemented'
  75         return
  76         jsi = JSInterpreter('''
  77         function x() {
  78             var x = /* 1 + */ 2;
  79             var y = /* 30
  80             * 40 */ 50;
  81             return x + y;
  82         }
  83         ''')
  84         self.assertEqual(jsi.call_function('x'), 52)
  85
  86         jsi = JSInterpreter('''
  87         function f() {
  88             var x = "/*";
  89             var y = 1 /* comment */ + 2;
  90             return y;
  91         }
  92         ''')
  93         self.assertEqual(jsi.call_function('f'), 3)
  94
  95     def test_precedence(self):
  96         jsi = JSInterpreter('''
  97         function x() {
  98             var a = [10, 20, 30, 40, 50];
  99             var b = 6;
 100             a[0]=a[b%a.length];
 101             return a;
 102         }''')
 103         self.assertEqual(jsi.call_function('x'), [20, 20, 30, 40, 50])
 104
 105     def test_call(self):
 106         jsi = JSInterpreter('''
 107         function x() { return 2; }
 108         function y(a) { return x() + a; }
 109         function z() { return y(3); }
 110         ''')
 111         self.assertEqual(jsi.call_function('z'), 5)
 112
 113     def test_for_loop(self):
 114         jsi = JSInterpreter('''
 115         function x() { a=0; for (i=0; i-10; i++) {a++} a }
 116         ''')
 117         self.assertEqual(jsi.call_function('x'), 10)
 118
 119     def test_switch(self):
 120         jsi = JSInterpreter('''
 121         function x(f) { switch(f){
 122             case 1:f+=1;
 123             case 2:f+=2;
 124             case 3:f+=3;break;
 125             case 4:f+=4;
 126             default:f=0;
 127         } return f }
 128         ''')
 129         self.assertEqual(jsi.call_function('x', 1), 7)
 130         self.assertEqual(jsi.call_function('x', 3), 6)
 131         self.assertEqual(jsi.call_function('x', 5), 0)
 132
 133     def test_switch_default(self):
 134         jsi = JSInterpreter('''
 135         function x(f) { switch(f){
 136             case 2: f+=2;
 137             default: f-=1;
 138             case 5:
 139             case 6: f+=6;
 140             case 0: break;
 141             case 1: f+=1;
 142         } return f }
 143         ''')
 144         self.assertEqual(jsi.call_function('x', 1), 2)
 145         self.assertEqual(jsi.call_function('x', 5), 11)
 146         self.assertEqual(jsi.call_function('x', 9), 14)
 147
 148     def test_try(self):
 149         jsi = JSInterpreter('''
 150         function x() { try{return 10} catch(e){return 5} }
 151         ''')
 152         self.assertEqual(jsi.call_function('x'), 10)
 153
 154     def test_for_loop_continue(self):
 155         jsi = JSInterpreter('''
 156         function x() { a=0; for (i=0; i-10; i++) { continue; a++ } a }
 157         ''')
 158         self.assertEqual(jsi.call_function('x'), 0)
 159
 160     def test_for_loop_break(self):
 161         jsi = JSInterpreter('''
 162         function x() { a=0; for (i=0; i-10; i++) { break; a++ } a }
 163         ''')
 164         self.assertEqual(jsi.call_function('x'), 0)
 165
 166     def test_literal_list(self):
 167         jsi = JSInterpreter('''
 168         function x() { [1, 2, "asdf", [5, 6, 7]][3] }
 169         ''')
 170         self.assertEqual(jsi.call_function('x'), [5, 6, 7])
 171
 172     def test_comma(self):
 173         jsi = JSInterpreter('''
 174         function x() { a=5; a -= 1, a+=3; return a }
 175         ''')
 176         self.assertEqual(jsi.call_function('x'), 7)
 177
 178
 179 if __name__ == '__main__':
 180     unittest.main()