1 files changed, 49 insertions, 0 deletions
diff --git a/packages/meshbay-hub/tests/test_desktop_shell.py b/packages/meshbay-hub/tests/test_desktop_shell.py
index 2e7ea82..5862ac3 100644
--- a/packages/meshbay-hub/tests/test_desktop_shell.py
+++ b/packages/meshbay-hub/tests/test_desktop_shell.py
@@ -536,3 +536,52 @@ def test_the_tray_is_created_at_launch():
 
     assert bridge < launch, "ensureTray must come after registerBridge"
     assert launch < window, "the tray is created as part of startup"
+
+
+# ── Chromium's command line ─────────────────────────────────────────────────
+
+def test_no_feature_list_is_ever_written_directly():
+    """
+    `--enable-features` and `--disable-features` are one comma-joined list
+    each, and `appendSwitch` **replaces** the value rather than appending to
+    it. A second direct call therefore cancels the first with no error and
+    nothing in a log — the symptom is a feature that is simply not on, which
+    is how the mDNS switch below and the VA-API switches could silently
+    cancel each other. Every caller goes through `addFeatures`, which merges.
+    """
+    direct = re.findall(r"appendSwitch\(\s*['\"](?:enable|disable)-features",
+                        _main())
+    assert not direct, (
+        "a feature list is being written with appendSwitch directly; it "
+        "overwrites whatever another line already put there — use addFeatures")
+
+
+def test_the_mdns_concealment_is_still_disabled():
+    """Chromium's `.local` host candidates are dropped by aiortc, which has no
+    mDNS resolver: concealing the local IP removes the only LAN-routable
+    candidate rather than degrading it."""
+    assert "addFeatures('disable-features', ['WebRtcHideLocalIpsWithMdns'])" in _main()
+
+
+def test_hardware_video_decoding_is_asked_for_and_then_verified():
+    """
+    Turning VA-API on is half the job. Chromium renames these features across
+    releases and the client is rebuilt against the newest Electron every time,
+    so a name that stops matching must not pass for a feature that is on: the
+    result is measured through `navigator.mediaCapabilities` and remembered,
+    and `--ignore-gpu-blocklist` is dropped again on a machine where the
+    measurement never says hardware.
+    """
+    main = _main()
+    for feature in ("VaapiVideoDecodeLinuxGL", "AcceleratedVideoDecodeLinuxGL"):
+        assert feature in main, f"{feature} is no longer requested"
+    assert "ignore-gpu-blocklist" in main
+    assert "mediaCapabilities" in main and "powerEfficient" in main, (
+        "the switches are applied but nothing checks whether they worked")
+
+
+def test_hardware_decoding_can_be_turned_off_without_a_rebuild():
+    """A machine whose GL stack misbehaves in a way the measurement does not
+    catch needs an answer that is not "reinstall": config.json, the same file
+    every other client setting lives in."""
+    assert "config.videoAcceleration" in _main()