[devale] improve input validation

Authored by: bashonly

test/test_devalue.py

@@ -141,7 +141,7 @@
     'name': 'hole',
     'unparsed': -2,
     'error': ValueError,
-    'pattern': r'invalid input',
+    'pattern': r'invalid integer input',
 }, {
     'name': 'string',
     'unparsed': 'hello',
@@ -150,13 +150,13 @@
 }, {
     'name': 'number',
     'unparsed': 42,
-    'error': KeyError,
-    'pattern': r'42',
+    'error': ValueError,
+    'pattern': r'invalid integer input',
 }, {
     'name': 'boolean',
     'unparsed': True,
-    'error': KeyError,
-    'pattern': r'True',
+    'error': ValueError,
+    'pattern': r'expected int or list as input',
 }, {
     'name': 'null',
     'unparsed': None,
@@ -170,8 +170,8 @@
 }, {
     'name': 'empty array',
     'unparsed': [],
-    'error': IndexError,
-    'pattern': r'list index out of range',
+    'error': ValueError,
+    'pattern': r'expected a non-empty list as input',
 }, {
     'name': 'Python negative indexing',
     'unparsed': [[1, 2, 3, 4, 5, 6, 7, -7], 1, 2, 3, 4, 5, 6, 7],

yt_dlp/utils/jslib/devalue.py

@@ -43,12 +43,14 @@ def parse_iter(parsed: typing.Any, /, *, revivers: dict[str, collections.abc.Cal
         -6: -0.0,
     }
 
-    if isinstance(parsed, int):
-        if parsed == -2:
-            raise ValueError('invalid input')
+    if isinstance(parsed, int) and not isinstance(parsed, bool):
+        if parsed not in resolved or parsed == -2:
+            raise ValueError('invalid integer input')
         return resolved[parsed]
     elif not isinstance(parsed, list):
         raise ValueError('expected int or list as input')
+    elif not parsed:
+        raise ValueError('expected a non-empty list as input')
 
     if revivers is None:
         revivers = {}