Fixes remove stream tags per list

tests/integration/subtrack_mapping/test_cli_bundle.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import json
 from pathlib import Path
 import tempfile
 import unittest
@@ -39,6 +40,11 @@ class SubtrackMappingBundleTests(unittest.TestCase):
     def tearDown(self):
         self.tempdir.cleanup()
 
+    def write_config(self, data: dict) -> None:
+        config_dir = self.home_dir / ".local" / "etc"
+        config_dir.mkdir(parents=True, exist_ok=True)
+        (config_dir / "ffx.json").write_text(json.dumps(data), encoding="utf-8")
+
     def assertCompleted(self, completed):
         if completed.returncode != 0:
             self.fail(
@@ -218,6 +224,15 @@ class SubtrackMappingBundleTests(unittest.TestCase):
 
     def test_external_subtitle_file_replaces_payload_and_overrides_metadata(self):
         source_filename = "substitute_s01e01.mkv"
+        self.write_config(
+            {
+                "metadata": {
+                    "streams": {
+                        "remove": ["BPS"],
+                    }
+                }
+            }
+        )
         source_path = create_source_fixture(
             self.workdir,
             source_filename,
@@ -229,6 +244,7 @@ class SubtrackMappingBundleTests(unittest.TestCase):
                     identity="embedded-subtitle",
                     language="eng",
                     title="Embedded Title",
+                    extra_tags={"BPS": "remove-me", "EXTERNAL_KEEP": "keep-me"},
                     subtitle_lines=("embedded subtitle payload",),
                 ),
             ],
@@ -273,6 +289,8 @@ class SubtrackMappingBundleTests(unittest.TestCase):
         self.assertEqual(get_tag(subtitle_stream, "language"), "deu")
         self.assertEqual(get_tag(subtitle_stream, "title"), "Embedded Title")
         self.assertEqual(get_tag(subtitle_stream, "THIS_IS"), "embedded-subtitle")
+        self.assertEqual(get_tag(subtitle_stream, "EXTERNAL_KEEP"), "keep-me")
+        self.assertIsNone(get_tag(subtitle_stream, "BPS"))
 
         extracted_subtitle = extract_first_subtitle_text(self.workdir, output_path)
         self.assertIn("external subtitle payload", extracted_subtitle)