+ def test_null(self):
+ jsi = JSInterpreter('''
+ function x() { return null; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), None)
+
+ jsi = JSInterpreter('''
+ function x() { return [null > 0, null < 0, null == 0, null === 0]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [False, False, False, False])
+
+ jsi = JSInterpreter('''
+ function x() { return [null >= 0, null <= 0]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [True, True])
+
+ def test_undefined(self):
+ jsi = JSInterpreter('''
+ function x() { return undefined === undefined; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), True)
+
+ jsi = JSInterpreter('''
+ function x() { return undefined; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), JS_Undefined)
+
+ jsi = JSInterpreter('''
+ function x() { let v; return v; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), JS_Undefined)
+
+ jsi = JSInterpreter('''
+ function x() { return [undefined === undefined, undefined == undefined, undefined < undefined, undefined > undefined]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [True, True, False, False])
+
+ jsi = JSInterpreter('''
+ function x() { return [undefined === 0, undefined == 0, undefined < 0, undefined > 0]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [False, False, False, False])
+
+ jsi = JSInterpreter('''
+ function x() { return [undefined >= 0, undefined <= 0]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [False, False])
+
+ jsi = JSInterpreter('''
+ function x() { return [undefined > null, undefined < null, undefined == null, undefined === null]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [False, False, True, False])
+
+ jsi = JSInterpreter('''
+ function x() { return [undefined === null, undefined == null, undefined < null, undefined > null]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [False, True, False, False])
+
+ jsi = JSInterpreter('''
+ function x() { let v; return [42+v, v+42, v**42, 42**v, 0**v]; }
+ ''')
+ for y in jsi.call_function('x'):
+ self.assertTrue(math.isnan(y))
+
+ jsi = JSInterpreter('''
+ function x() { let v; return v**0; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), 1)
+
+ jsi = JSInterpreter('''
+ function x() { let v; return [v>42, v<=42, v&&42, 42&&v]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [False, False, JS_Undefined, JS_Undefined])
+
+ jsi = JSInterpreter('function x(){return undefined ?? 42; }')
+ self.assertEqual(jsi.call_function('x'), 42)
+
+ def test_object(self):
+ jsi = JSInterpreter('''
+ function x() { return {}; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), {})
+
+ jsi = JSInterpreter('''
+ function x() { let a = {m1: 42, m2: 0 }; return [a["m1"], a.m2]; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), [42, 0])
+
+ jsi = JSInterpreter('''
+ function x() { let a; return a?.qq; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), JS_Undefined)
+
+ jsi = JSInterpreter('''
+ function x() { let a = {m1: 42, m2: 0 }; return a?.qq; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), JS_Undefined)
+
+ def test_regex(self):
+ jsi = JSInterpreter('''
+ function x() { let a=/,,[/,913,/](,)}/; }
+ ''')
+ self.assertEqual(jsi.call_function('x'), None)
+
+ jsi = JSInterpreter('''
+ function x() { let a=/,,[/,913,/](,)}/; return a; }
+ ''')
+ self.assertIsInstance(jsi.call_function('x'), re.Pattern)
+
+ jsi = JSInterpreter('''
+ function x() { let a=/,,[/,913,/](,)}/i; return a; }
+ ''')
+ self.assertEqual(jsi.call_function('x').flags & re.I, re.I)
+
+ jsi = JSInterpreter(R'''
+ function x() { let a=/,][}",],()}(\[)/; return a; }
+ ''')
+ self.assertEqual(jsi.call_function('x').pattern, r',][}",],()}(\[)')
+
+ jsi = JSInterpreter(R'''
+ function x() { let a=[/[)\\]/]; return a[0]; }
+ ''')
+ self.assertEqual(jsi.call_function('x').pattern, r'[)\\]')
+
+ def test_char_code_at(self):
+ jsi = JSInterpreter('function x(i){return "test".charCodeAt(i)}')
+ self.assertEqual(jsi.call_function('x', 0), 116)
+ self.assertEqual(jsi.call_function('x', 1), 101)
+ self.assertEqual(jsi.call_function('x', 2), 115)
+ self.assertEqual(jsi.call_function('x', 3), 116)
+ self.assertEqual(jsi.call_function('x', 4), None)
+ self.assertEqual(jsi.call_function('x', 'not_a_number'), 116)
+
+ def test_bitwise_operators_overflow(self):
+ jsi = JSInterpreter('function x(){return -524999584 << 5}')
+ self.assertEqual(jsi.call_function('x'), 379882496)
+
+ jsi = JSInterpreter('function x(){return 1236566549 << 5}')
+ self.assertEqual(jsi.call_function('x'), 915423904)
+