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#!/usr/bin/env python
from __future__ import unicode_literals
# Allow direct execution
import os
import sys
import unittest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from youtube_dl.jsinterp import JSInterpreter
class TestJSInterpreter(unittest.TestCase):
def test_basic(self):
jsi = JSInterpreter('function x(){;}')
self.assertEqual(jsi.call_function('x'), None)
jsi = JSInterpreter('function x3(){return 42;}')
self.assertEqual(jsi.call_function('x3'), 42)
jsi = JSInterpreter('var x5 = function(){return 42;}')
self.assertEqual(jsi.call_function('x5'), 42)
def test_calc(self):
jsi = JSInterpreter('function x4(a){return 2*a+1;}')
self.assertEqual(jsi.call_function('x4', 3), 7)
def test_empty_return(self):
jsi = JSInterpreter('function f(){return; y()}')
self.assertEqual(jsi.call_function('f'), None)
def test_morespace(self):
jsi = JSInterpreter('function x (a) { return 2 * a + 1 ; }')
self.assertEqual(jsi.call_function('x', 3), 7)
jsi = JSInterpreter('function f () { x = 2 ; return x; }')
self.assertEqual(jsi.call_function('f'), 2)
def test_strange_chars(self):
jsi = JSInterpreter('function $_xY1 ($_axY1) { var $_axY2 = $_axY1 + 1; return $_axY2; }')
self.assertEqual(jsi.call_function('$_xY1', 20), 21)
def test_operators(self):
jsi = JSInterpreter('function f(){return 1 << 5;}')
self.assertEqual(jsi.call_function('f'), 32)
jsi = JSInterpreter('function f(){return 19 & 21;}')
self.assertEqual(jsi.call_function('f'), 17)
jsi = JSInterpreter('function f(){return 11 >> 2;}')
self.assertEqual(jsi.call_function('f'), 2)
def test_array_access(self):
jsi = JSInterpreter('function f(){var x = [1,2,3]; x[0] = 4; x[0] = 5; x[2] = 7; return x;}')
self.assertEqual(jsi.call_function('f'), [5, 2, 7])
def test_parens(self):
jsi = JSInterpreter('function f(){return (1) + (2) * ((( (( (((((3)))))) )) ));}')
self.assertEqual(jsi.call_function('f'), 7)
jsi = JSInterpreter('function f(){return (1 + 2) * 3;}')
self.assertEqual(jsi.call_function('f'), 9)
def test_assignments(self):
jsi = JSInterpreter('function f(){var x = 20; x = 30 + 1; return x;}')
self.assertEqual(jsi.call_function('f'), 31)
jsi = JSInterpreter('function f(){var x = 20; x += 30 + 1; return x;}')
self.assertEqual(jsi.call_function('f'), 51)
jsi = JSInterpreter('function f(){var x = 20; x -= 30 + 1; return x;}')
self.assertEqual(jsi.call_function('f'), -11)
def test_comments(self):
'Skipping: Not yet fully implemented'
return
jsi = JSInterpreter('''
function x() {
var x = /* 1 + */ 2;
var y = /* 30
* 40 */ 50;
return x + y;
}
''')
self.assertEqual(jsi.call_function('x'), 52)
jsi = JSInterpreter('''
function f() {
var x = "/*";
var y = 1 /* comment */ + 2;
return y;
}
''')
self.assertEqual(jsi.call_function('f'), 3)
def test_precedence(self):
jsi = JSInterpreter('''
function x() {
var a = [10, 20, 30, 40, 50];
var b = 6;
a[0]=a[b%a.length];
return a;
}''')
self.assertEqual(jsi.call_function('x'), [20, 20, 30, 40, 50])
def test_call(self):
jsi = JSInterpreter('''
function x() { return 2; }
function y(a) { return x() + a; }
function z() { return y(3); }
''')
self.assertEqual(jsi.call_function('z'), 5)
def test_for_loop(self):
# function x() { a=0; for (i=0; i-10; i++) {a++} a }
jsi = JSInterpreter('''
function x() { a=0; for (i=0; i-10; i = i + 1) {a++} a }
''')
self.assertEqual(jsi.call_function('x'), 10)
def test_switch(self):
jsi = JSInterpreter('''
function x(f) { switch(f){
case 1:f+=1;
case 2:f+=2;
case 3:f+=3;break;
case 4:f+=4;
default:f=0;
} return f }
''')
self.assertEqual(jsi.call_function('x', 1), 7)
self.assertEqual(jsi.call_function('x', 3), 6)
self.assertEqual(jsi.call_function('x', 5), 0)
def test_switch_default(self):
jsi = JSInterpreter('''
function x(f) { switch(f){
case 2: f+=2;
default: f-=1;
case 5:
case 6: f+=6;
case 0: break;
case 1: f+=1;
} return f }
''')
self.assertEqual(jsi.call_function('x', 1), 2)
self.assertEqual(jsi.call_function('x', 5), 11)
self.assertEqual(jsi.call_function('x', 9), 14)
def test_try(self):
jsi = JSInterpreter('''
function x() { try{return 10} catch(e){return 5} }
''')
self.assertEqual(jsi.call_function('x'), 10)
def test_for_loop_continue(self):
jsi = JSInterpreter('''
function x() { a=0; for (i=0; i-10; i++) { continue; a++ } a }
''')
self.assertEqual(jsi.call_function('x'), 0)
def test_for_loop_break(self):
jsi = JSInterpreter('''
function x() { a=0; for (i=0; i-10; i++) { break; a++ } a }
''')
self.assertEqual(jsi.call_function('x'), 0)
def test_literal_list(self):
jsi = JSInterpreter('''
function x() { [1, 2, "asdf", [5, 6, 7]][3] }
''')
self.assertEqual(jsi.call_function('x'), [5, 6, 7])
def test_comma(self):
jsi = JSInterpreter('''
function x() { a=5; a -= 1, a+=3; return a }
''')
self.assertEqual(jsi.call_function('x'), 7)
if __name__ == '__main__':
unittest.main()
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