test(15-01): add smoke tests for driver-list visibility and upload feedback

- test_printers_new_driver_list_visible: RED before fix — asserts #driver-list exists and is not hidden
- test_upload_feedback_visible_on_printers_new: guards OOB contract (driver name + hx-swap-oob in response)
- Added io, zipfile imports and local _make_driver_zip_for_form_test helper

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_printer_form.py

@@ -1,4 +1,7 @@
 """Tests for printer form template wiring — inline driver upload + OOB select."""
+import io
+import zipfile
+
 from fastapi.testclient import TestClient
 
 
@@ -39,3 +42,97 @@ def test_printer_form_has_inline_driver_upload(client: TestClient) -> None:
     assert 'method="post"' in html, (
         'Printer form must use method="post"'
     )
+
+
+# ---------------------------------------------------------------------------
+# Wave 0 smoke tests — driver-list visibility and upload feedback (15-01)
+# ---------------------------------------------------------------------------
+
+_SAMPLE_INF_FORM = """\
+[Version]
+Signature="$Windows NT$"
+Class=Printer
+Provider=%MFG%
+
+[Manufacturer]
+%MFG%=Models,NTamd64
+
+[Models.NTamd64]
+%DRIVER_NAME%=Install,{12345678-1234-1234-1234-123456789012}
+
+[Strings]
+MFG="Test Manufacturer"
+DRIVER_NAME="Test LaserJet Pro"
+"""
+
+
+def _make_driver_zip_for_form_test(
+    inf_content: str = _SAMPLE_INF_FORM,
+    inf_name: str = "sample.inf",
+) -> bytes:
+    """Build an in-memory ZIP with one .inf file for printer form tests.
+
+    Do NOT import _make_driver_zip from test_driver_upload.py — replicated here
+    as a standalone local helper per plan instructions.
+    """
+    buf = io.BytesIO()
+    with zipfile.ZipFile(buf, "w", compression=zipfile.ZIP_DEFLATED) as zf:
+        zf.writestr(inf_name, inf_content.encode("utf-8"))
+    return buf.getvalue()
+
+
+def test_printers_new_driver_list_visible(client: TestClient) -> None:
+    """GET /printers/new: #driver-list anchor exists and is NOT hidden.
+
+    BUG (15-UX-01): printers_new.html line 98 has style="display:none" on
+    #driver-list. The HTMX outerHTML swap succeeds but the confirmation content
+    (driver name + table) is invisible. Fix: remove the style attribute.
+
+    RED: This test FAILS until the style="display:none" is removed from
+    printers_new.html.
+    """
+    resp = client.get("/printers/new")
+    assert resp.status_code == 200
+
+    # Anchor must exist (HTMX hx-target="#driver-list" requires this id)
+    assert 'id="driver-list"' in resp.text, (
+        '#driver-list anchor missing from /printers/new — HTMX swap target not present'
+    )
+
+    # Anchor must NOT be hidden — technician must see upload confirmation
+    assert 'id="driver-list" style="display:none"' not in resp.text, (
+        '#driver-list has style="display:none" — upload confirmation will be invisible. '
+        'Remove the style attribute from printers_new.html.'
+    )
+
+
+def test_upload_feedback_visible_on_printers_new(client: TestClient) -> None:
+    """POST /drivers/upload with caller=printer_form: response contains driver name + OOB select.
+
+    The server already returns the correct fragment (driver name in primary content,
+    hx-swap-oob select in sibling). This test guards against regression of the
+    server-side OOB contract while the DOM-side visibility bug is fixed separately
+    in printers_new.html.
+
+    NOTE: This test may PASS even before the template fix because the bug is
+    DOM-side (hidden div) not server-side (response fragment is correct).
+    """
+    zip_bytes = _make_driver_zip_for_form_test()
+    resp = client.post(
+        "/drivers/upload",
+        files={"file": ("driver.zip", zip_bytes, "application/zip")},
+        data={"caller": "printer_form"},
+    )
+    assert resp.status_code == 200
+
+    # Upload confirmation: driver name must appear in the response fragment
+    assert "Test LaserJet Pro" in resp.text, (
+        'Upload response does not contain driver name "Test LaserJet Pro" — '
+        "upload confirmation content missing from server fragment"
+    )
+
+    # OOB select must still be present (regression guard — dropdown refresh)
+    assert 'hx-swap-oob="true"' in resp.text, (
+        'Upload response missing hx-swap-oob="true" — OOB select refresh broken. '
+        "Regression in driver_upload_with_oob.html or upload handler."
+    )