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test(files): cover Escape closes editor with no stale state

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Opens server.cfg, drives the CM6 controller to a dirty buffer,
presses Escape to close without saving, then reopens the same file
and asserts the editor shows the original disk content — not the
discarded buffer.

Pins two invariants: native <dialog>'s cancel→close path stays
intact (no JS shortcut around Escape), and the reopened editor
fetches a FRESH fragment via htmx.ajax with CM6 re-mounting on
the new textarea. A regression that cached buffer state to "feel
snappy" would fail this test loudly.

Per docs/superpowers/plans/2026-05-17-files-overlay-e2e-handoff.md
(Tier 2 case B).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
mwiegand 2026-05-17 19:17:21 +02:00
parent b222fdc918
commit a6be29c6d2
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41
l4d2web/tests/e2e/test_files_overlay.py
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@ -412,3 +412,44 @@ def test_share_url_deep_link_reopens_editor(page: Page, files_overlay_server) ->
_wait_for_routed_editor(page)
assert page.locator('textarea[data-rel-path="server.cfg"]').count() == 1
def test_modal_close_on_escape_preserves_no_state(page: Page, files_overlay_server) -> None:
"""Open server.cfg, drive the CM6 controller to a dirty buffer,
press Escape to close the modal without saving, then reopen the
same file and assert the editor shows the original disk content
— not the dirty buffer the user just discarded.
Pins two invariants:
* modals.js's `cancel` → preventDefault → close() path on
`<dialog id="modal-container">` actually closes the modal on
Escape (no JS shortcuts away from the native behavior).
* The reopened editor fetches a fresh fragment via htmx.ajax;
the CM6 controller re-mounts on the FRESH textarea (seeded
from disk content), not a stale cache of the prior session.
A regression that survived the close event — e.g., a future commit
that cached buffer state in a module-scope variable to "feel
snappy" — would surface here as the dirty content reappearing.
"""
base = files_overlay_server["base_url"]
overlay_id = files_overlay_server["overlay_id"]
overlay_root = files_overlay_server["overlay_root"]
original_content = (overlay_root / "server.cfg").read_text()
_open_overlay(page, base, overlay_id)
# --- First open: type something but don't save ----------------------
page.click('button.file-tree-name-button[data-target-path="server.cfg"]')
_wait_for_routed_editor(page)
dirty = "DIRTY UNSAVED BUFFER " + "x" * 40
page.evaluate("(t) => window.__filesEditor.setContent(t)", dirty)
page.keyboard.press("Escape")
expect(page.locator("#modal-container")).to_be_hidden(timeout=5000)
# Disk must still hold the original — never saved.
assert (overlay_root / "server.cfg").read_text() == original_content
# --- Reopen and confirm CM6 starts fresh from disk ------------------
page.click('button.file-tree-name-button[data-target-path="server.cfg"]')
_wait_for_routed_editor(page)
reopened = page.evaluate("() => window.__filesEditor.getValue()")
assert reopened == original_content