test/test_jsinterp.py

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