updated for test coverage

Author: sgd2z

llsd/base.py

@@ -411,16 +411,12 @@ def _reset(self, something):
             # BytesIO is significant, advise caller to pass a stream instead.
             self._stream = io.BytesIO(something)
         elif isinstance(something, io.IOBase):
-            # 'something' is a proper IO stream
+            # 'something' is a proper IO stream - must be seekable for parsing
             if something.seekable():
-                # Seekable stream, use directly
                 self._stream = something
-            elif something.readable():
-                # Readable but not seekable, wrap in BufferedReader
-                self._stream = io.BufferedReader(something)
             else:
                 raise LLSDParseError(
-                    "Cannot parse LLSD from non-readable stream."
+                    "Cannot parse LLSD from non-seekable stream."
                 )
         else:
             # Invalid input type - raise a clear error

tests/llsd_test.py

@@ -2022,4 +2022,14 @@ def test_parse_int_raises_error(self):
             llsd.parse(42)
         self.assertIn('int', str(context.exception))
 
+    def test_parse_non_seekable_stream_raises_error(self):
+        '''
+        Parsing a non-seekable stream should raise LLSDParseError.
+        '''
+        stream = io.BytesIO()
+        stream.seekable = lambda: False
+        with self.assertRaises(llsd.LLSDParseError) as context:
+            llsd.parse(stream)
+        self.assertIn('non-seekable', str(context.exception))
+