Raphaël G. Git Repositories - youtubedl/blob - test/test_jsinterp.py

   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 from youtube_dl.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     def test_calc(self):
  23         jsi = JSInterpreter('function x4(a){return 2*a+1;}')
  24         self.assertEqual(jsi.call_function('x4', 3), 7)
  25
  26     def test_empty_return(self):
  27         jsi = JSInterpreter('function f(){return; y()}')
  28         self.assertEqual(jsi.call_function('f'), None)
  29
  30     def test_morespace(self):
  31         jsi = JSInterpreter('function x (a) { return 2 * a + 1 ; }')
  32         self.assertEqual(jsi.call_function('x', 3), 7)
  33
  34         jsi = JSInterpreter('function f () { x =  2  ; return x; }')
  35         self.assertEqual(jsi.call_function('f'), 2)
  36
  37     def test_strange_chars(self):
  38         jsi = JSInterpreter('function $_xY1 ($_axY1) { var $_axY2 = $_axY1 + 1; return $_axY2; }')
  39         self.assertEqual(jsi.call_function('$_xY1', 20), 21)
  40
  41     def test_operators(self):
  42         jsi = JSInterpreter('function f(){return 1 << 5;}')
  43         self.assertEqual(jsi.call_function('f'), 32)
  44
  45         jsi = JSInterpreter('function f(){return 19 & 21;}')
  46         self.assertEqual(jsi.call_function('f'), 17)
  47
  48         jsi = JSInterpreter('function f(){return 11 >> 2;}')
  49         self.assertEqual(jsi.call_function('f'), 2)
  50
  51     def test_array_access(self):
  52         jsi = JSInterpreter('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2] = 7; return x;}')
  53         self.assertEqual(jsi.call_function('f'), [5, 2, 7])
  54
  55     def test_parens(self):
  56         jsi = JSInterpreter('function f(){return (1) + (2) * ((( (( (((((3)))))) )) ));}')
  57         self.assertEqual(jsi.call_function('f'), 7)
  58
  59         jsi = JSInterpreter('function f(){return (1 + 2) * 3;}')
  60         self.assertEqual(jsi.call_function('f'), 9)
  61
  62     def test_assignments(self):
  63         jsi = JSInterpreter('function f(){var x = 20; x = 30 + 1; return x;}')
  64         self.assertEqual(jsi.call_function('f'), 31)
  65
  66         jsi = JSInterpreter('function f(){var x = 20; x += 30 + 1; return x;}')
  67         self.assertEqual(jsi.call_function('f'), 51)
  68
  69         jsi = JSInterpreter('function f(){var x = 20; x -= 30 + 1; return x;}')
  70         self.assertEqual(jsi.call_function('f'), -11)
  71
  72     def test_comments(self):
  73         'Skipping: Not yet fully implemented'
  74         return
  75         jsi = JSInterpreter('''
  76         function x() {
  77             var x = /* 1 + */ 2;
  78             var y = /* 30
  79             * 40 */ 50;
  80             return x + y;
  81         }
  82         ''')
  83         self.assertEqual(jsi.call_function('x'), 52)
  84
  85         jsi = JSInterpreter('''
  86         function f() {
  87             var x = "/*";
  88             var y = 1 /* comment */ + 2;
  89             return y;
  90         }
  91         ''')
  92         self.assertEqual(jsi.call_function('f'), 3)
  93
  94     def test_precedence(self):
  95         jsi = JSInterpreter('''
  96         function x() {
  97             var a = [10, 20, 30, 40, 50];
  98             var b = 6;
  99             a[0]=a[b%a.length];
 100             return a;
 101         }''')
 102         self.assertEqual(jsi.call_function('x'), [20, 20, 30, 40, 50])
 103
 104
 105 if __name__ == '__main__':
 106     unittest.main()