test(hub): the folder-name test was reading the ".." row

`test_a_folder_name_carries_no_trailing_slash` sliced from the first
`dir-row` in files-app.js. Since the parent-directory row was added, that
is the ".." row, whose only cell is an ellipsis — so the slice contained
no `${d}` and the test failed on a name it had never looked at. The
directory row itself has always rendered `${d}` with no trailing slash.

Anchored on `key=${full}` instead, with an assertion that the anchor
still lands on a `dir-row` so the next move fails loudly rather than
silently reading the wrong markup again.

Pre-existing: it fails the same way on main.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011pvMdvLBG92jyhvD5pD6us

1 files changed, 11 insertions, 3 deletions

diff --git a/packages/meshbay-hub/tests/test_transfers.py b/packages/meshbay-hub/tests/test_transfers.py
index 86d58cd..3316615 100644
--- a/packages/meshbay-hub/tests/test_transfers.py
+++ b/packages/meshbay-hub/tests/test_transfers.py
@@ -208,9 +208,17 @@ def test_the_colour_is_defined_for_that_mark():
 # ── The file list ───────────────────────────────────────────────────────────
 
 def test_a_folder_name_carries_no_trailing_slash():
-    """The folder icon in the cell beside it already says what it is."""
+    """
+    The folder icon in the cell beside it already says what it is.
+
+    Anchored on `key=${full}`, which is the row that renders a directory. The
+    first `dir-row` in the file is the ".." row added later, whose only cell is
+    an ellipsis — slicing from there found no `${d}` and failed on a name it
+    had never looked at.
+    """
     source = STATIC.joinpath("files-app.js").read_text(encoding="utf-8")
-    row = source[source.index('class="file-row dir-row"'):]
-    row = row[:row.index("</tr>")]
+    start = source.rindex("<tr", 0, source.index("key=${full}"))
+    row = source[start:source.index("</tr>", start)]
+    assert "dir-row" in row, "the anchor no longer lands on the directory row"
     assert "${d}/" not in row, "the folder name is rendered with a trailing slash"
     assert "${d}" in row