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diff --git a/packages/meshbay-hub/tests/test_copy_link.py b/packages/meshbay-hub/tests/test_copy_link.py
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+++ b/packages/meshbay-hub/tests/test_copy_link.py
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+"""
+"Copy link": the `#/name@owner/path` address of a file or folder, from the
+views that show one (harness/copy_link_probe.py).
+
+Files offers it for one row — right-click, or the toolbar with one row ticked,
+which is how a phone reaches it; Music on one track's menu, whose dots are a
+phone's way in; Photos on a right-clicked tile and in the lightbox. The video
+player and the file preview carry a button. Search passes the same `linkFor`,
+naming each result's own group and its path there rather than the merged tree's.
+"""
+
+import json
+import re
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+HARNESS = Path(__file__).parent / "harness" / "copy_link_probe.py"
+STATIC = Path(__file__).resolve().parents[1] / "src" / "meshbay_hub" / "static"
+ORIGIN = "http://127.0.0.1:8775"
+
+
+@pytest.fixture(scope="module")
+def cases():
+    if shutil.which("google-chrome") is None:
+        pytest.skip("Chrome is not available")
+    proc = subprocess.run([sys.executable, str(HARNESS)],
+                          capture_output=True, text=True, timeout=180)
+    assert proc.returncode == 0, f"probe failed: {proc.stdout}{proc.stderr}"
+    out = json.loads(proc.stdout)
+    assert "error" not in out, out["error"]
+    assert out["logs"] == []
+    return {c["case"]: c for c in out["cases"]}
+
+
+def test_files_a_folder(cases):
+    c = cases["files folder"]
+    assert "Copy link" in c["labels"]
+    assert c["copied"] == f"{ORIGIN}/#/demo@someowner/Root"
+    assert c["note"] == "Link copied"
+
+
+def test_files_a_file(cases):
+    c = cases["files file"]
+    assert c["labels"].index("Copy link") > c["labels"].index("Download")
+    assert c["copied"] == f"{ORIGIN}/#/demo@someowner/Root/trip_2015/IMG%200001.JPG"
+
+
+def test_files_toolbar_one_ticked_row_only(cases):
+    c = cases["files toolbar"]
+    assert c["one_enabled"] is True and c["two_enabled"] is False
+    assert c["copied"] == f"{ORIGIN}/#/demo@someowner/Root/trip_2015/notes.txt"
+
+
+def test_music_a_track_from_its_dots(cases):
+    c = cases["music track"]
+    assert c["dots"] and c["labels"][-1] == "Copy link"
+    assert c["copied"] == f"{ORIGIN}/#/demo@someowner/Music/Some%20Album/track%2001.flac"
+
+
+def test_photos_tile_and_lightbox(cases):
+    c = cases["photos"]
+    link = f"{ORIGIN}/#/demo@someowner/Pics/Summer/beach.jpg"
+    assert c["labels"] == ["Copy link"] and c["copied"] == link
+    assert c["lightbox_button"] and c["lightbox_copied"] == link
+
+
+@pytest.mark.parametrize("module", ["video-player.js", "files-app.js"])
+def test_the_modals_carry_a_link_button(module):
+    source = (STATIC / module).read_text(encoding="utf-8")
+    assert re.search(r"function (VideoPlayer|FilePreview)\(\{[^}]*onCopyLink", source)
+    assert "${onCopyLink && html`" in source
+
+
+@pytest.mark.parametrize("page, n", [("group-page.js", 2), ("search-page.js", 2)])
+def test_both_pages_hand_the_modals_a_link(page, n):
+    source = (STATIC / page).read_text(encoding="utf-8")
+    assert source.count("onCopyLink=${linkFor(") == n
+
+
+def test_search_names_each_results_own_group_and_path():
+    source = (STATIC / "search-page.js").read_text(encoding="utf-8")
+    # Every view prefixes `path`; the link is built from the original.
+    assert source.count("_origPath: e.path,") == 4
+    assert "entryPath(target, target._origPath)" in source
+    for view in ("FilesPanel", "MusicApp", "PhotosApp"):
+        at = source.index(f"<${{{view}}}")
+        assert "linkFor=${linkFor}" in source[at:source.index("/>", at)], view
+
+
+def test_the_link_is_the_hubs_not_the_pages():
+    """In the desktop application the page is app://meshbay."""
+    source = (STATIC / "copy-link.js").read_text(encoding="utf-8")
+    assert "platform.hubOrigin() + '/#' + groupLinkRoute(" in source
+    assert "location.origin" not in source
+
+
+def test_the_note_goes_by_itself(cases):
+    c = cases["note goes"]
+    assert c["up_after_copy"] is True and c["up_later"] is False