core: extract GUI-free logic into bal.core (reminders/checkalive/input_rules); fix save/sign tx RLock pickle by serializing tx; keep invalid heirs in wallet on build; tb1 testnet will-executor addresses; move tests to core modules

tests/test_core_checkalive.py

@@ -0,0 +1,95 @@
+"""
+Tests for ``bal.core.checkalive`` (pure, GUI-free).
+
+Covers the CheckAliveError exception and the BASIC/ADVANCED date_to_check
+policy (``resolve_date_to_check`` / ``check_alive_expired``).
+
+Run:
+    source /home/steal/devel/bal/electrum/env/bin/activate
+    python3 tests/test_core_checkalive.py
+"""
+
+import sys
+import time
+
+sys.path.insert(0, __file__.rsplit("/", 2)[0])
+
+from bal.core.checkalive import (  # noqa: E402  (path insert above)
+    CheckAliveError,
+    check_alive_expired,
+    resolve_date_to_check,
+)
+
+# ------------------------------------------------------------------ #
+# CheckAliveError
+# ------------------------------------------------------------------ #
+
+
+def test_check_alive_error_default():
+    err = CheckAliveError(1000000)
+    assert err.timestamp_to_check == 1000000
+
+
+def test_check_alive_error_str():
+    err = CheckAliveError(1000000)
+    s = str(err)
+    assert "Check alive expired" in s
+    assert "1970" in s
+
+
+def test_check_alive_error_subclass():
+    assert issubclass(CheckAliveError, Exception)
+
+
+# ------------------------------------------------------------------ #
+# resolve_date_to_check
+# ------------------------------------------------------------------ #
+
+
+def test_basic_mode_uses_now():
+    fake_now = 1_800_000_000.0
+    assert resolve_date_to_check(True, {}, now=fake_now) == fake_now
+
+
+def test_advanced_mode_uses_threshold_absolute():
+    threshold = time.time() + 5 * 86400
+    settings = {"threshold": threshold}
+    result = resolve_date_to_check(False, settings)
+    assert abs(result - threshold) < 1
+
+
+def test_advanced_mode_parses_relative_threshold():
+    # "30d" resolves to a future timestamp (midnight-normalised).
+    settings = {"threshold": "30d"}
+    result = resolve_date_to_check(False, settings)
+    assert result > time.time()
+
+
+# ------------------------------------------------------------------ #
+# check_alive_expired
+# ------------------------------------------------------------------ #
+
+
+def test_basic_mode_never_expired():
+    assert check_alive_expired(True, 1_000_000_000.0) is False
+    assert check_alive_expired(True, time.time() - 10_000) is False
+
+
+def test_advanced_expired_when_past():
+    assert check_alive_expired(False, time.time() - 10_000) is True
+
+
+def test_advanced_not_expired_when_future():
+    assert check_alive_expired(False, time.time() + 10_000) is False
+
+
+# ------------------------------------------------------------------ #
+# Main
+# ------------------------------------------------------------------ #
+
+if __name__ == "__main__":
+    for name in sorted(dir()):
+        if name.startswith("test_"):
+            globals()[name]()
+            print(f"  [OK] {name}")
+    print("[OK] All core checkalive tests passed")

tests/test_core_input_rules.py

@@ -0,0 +1,165 @@
+"""
+Tests for ``bal.core.input_rules`` (pure, GUI-free).
+
+Covers the locktime acceptance bounds, the RAW locktime sanitisation, and the
+percentage-or-amount field normalisation that the Qt editors wrap.
+
+Run:
+    source /home/steal/devel/bal/electrum/env/bin/activate
+    python3 tests/test_core_input_rules.py
+"""
+
+import sys
+
+sys.path.insert(0, __file__.rsplit("/", 2)[0])
+
+from bal.core.input_rules import (  # noqa: E402  (path insert above)
+    LockTimeEditor,
+    normalize_locktime_raw_text,
+    normalize_perc_amount_text,
+    parse_perc_amount,
+    replace_dy_suffixes,
+)
+
+# ------------------------------------------------------------------ #
+# LockTimeEditor
+# ------------------------------------------------------------------ #
+
+
+def test_locktime_editor_is_acceptable():
+    assert LockTimeEditor.is_acceptable_locktime(100) is True
+    assert LockTimeEditor.is_acceptable_locktime(0) is True
+    assert LockTimeEditor.is_acceptable_locktime(-1) is False
+    assert LockTimeEditor.is_acceptable_locktime(None) is True
+
+
+def test_locktime_editor_is_acceptable_string():
+    assert LockTimeEditor.is_acceptable_locktime("100") is True
+    assert LockTimeEditor.is_acceptable_locktime("abc") is False
+    assert LockTimeEditor.is_acceptable_locktime("") is True
+
+
+def test_locktime_editor_min_max():
+    assert LockTimeEditor.min_allowed_value >= 0
+    assert LockTimeEditor.max_allowed_value > LockTimeEditor.min_allowed_value
+
+
+def test_locktime_editor_get_max_allowed_timestamp():
+    # Always a valid, fromtimestamp-able value (the Windows 2038 clamp).
+    ts = LockTimeEditor.get_max_allowed_timestamp()
+    import datetime
+
+    datetime.datetime.fromtimestamp(ts)  # must not raise
+    assert ts <= 2**32 - 1
+
+
+def test_locktime_editor_subclass_bounds():
+    class Tight(LockTimeEditor):
+        min_allowed_value = 1000
+        max_allowed_value = 2000
+
+    assert Tight.is_acceptable_locktime(1500) is True
+    assert Tight.is_acceptable_locktime(999) is False
+    assert Tight.is_acceptable_locktime(2001) is False
+
+
+# ------------------------------------------------------------------ #
+# replace_dy_suffixes / RAW locktime sanitisation
+# ------------------------------------------------------------------ #
+
+
+def test_replace_dy_suffixes():
+    # replace_str only strips the day ("d") and year ("y") suffixes. The
+    # block-height suffix ("b") was removed (A1), so "b" is NOT stripped
+    # anymore (locktimes are always UNIX timestamps now).
+    assert replace_dy_suffixes("123d") == "123"
+    assert replace_dy_suffixes("456y") == "456"
+    # "b" is left untouched (no longer a recognised suffix)
+    assert replace_dy_suffixes("789b") == "789b"
+    # only d/y are stripped; a stray "b" remains
+    assert replace_dy_suffixes("12d34y56b") == "123456b"
+
+
+def test_normalize_locktime_raw_empty():
+    s, isdays, isyears, pos = normalize_locktime_raw_text("", 0)
+    assert s == ""
+    assert isdays is False
+    assert isyears is False
+
+
+def test_normalize_locktime_raw_days():
+    s, isdays, isyears, pos = normalize_locktime_raw_text("30d", 3)
+    assert s == "30d"
+    assert isdays is True
+    assert isyears is False
+
+
+def test_normalize_locktime_raw_years():
+    s, isdays, isyears, pos = normalize_locktime_raw_text("2y", 2)
+    assert s == "2y"
+    assert isdays is False
+    assert isyears is True
+
+
+def test_normalize_locktime_raw_strips_bad_chars():
+    s, isdays, isyears, pos = normalize_locktime_raw_text("12a34b56", 8)
+    assert s == "123456"
+    assert isdays is False
+    assert isyears is False
+
+
+def test_normalize_locktime_raw_single_suffix():
+    # "1y30d" collapses to a single suffix; "d" wins (processed first), so the
+    # "y" is dropped along with all letters.
+    s, isdays, isyears, pos = normalize_locktime_raw_text("1y30d", 5)
+    assert isdays is True
+    assert isyears is False
+    assert s == "130d"
+
+
+# ------------------------------------------------------------------ #
+# Percentage-or-amount normalisation
+# ------------------------------------------------------------------ #
+
+
+def test_perc_normalize_percent():
+    s, is_perc = normalize_perc_amount_text("50%", ".")
+    assert is_perc is True
+    assert s == "50%"
+
+
+def test_perc_normalize_no_percent():
+    s, is_perc = normalize_perc_amount_text("123", ".")
+    assert is_perc is False
+    assert s == "123"
+
+
+def test_perc_normalize_strips_invalid():
+    s, is_perc = normalize_perc_amount_text("1a2b3", ".")
+    assert s == "123"
+
+
+def test_perc_normalize_decimal_limit():
+    # At most 8 decimals after the point.
+    s, is_perc = normalize_perc_amount_text("1.1234567890123", ".")
+    assert s == "1.12345678"
+
+
+def test_perc_parse():
+    from decimal import Decimal
+
+    assert parse_perc_amount("50%", ".") == Decimal(50)
+    assert parse_perc_amount("123.45", ".") == Decimal("123.45")
+    assert parse_perc_amount("abc", ".") is None
+
+
+# ------------------------------------------------------------------ #
+# Main
+# ------------------------------------------------------------------ #
+
+if __name__ == "__main__":
+    for name in sorted(dir()):
+        if name.startswith("test_"):
+            globals()[name]()
+            print(f"  [OK] {name}")
+    print("[OK] All core input_rules tests passed")

tests/test_core_reminders.py

@@ -0,0 +1,299 @@
+"""
+Tests for ``bal.core.reminders`` (pure, GUI-free).
+
+Covers the reminder-offset rules (BASIC + ADVANCED), the RFC-5545 helpers
+(format_time, ical_escape, fold_ical_line), write_temp_ics, and the unified
+``build_ics_reminders`` builder.
+
+This module imports only ``bal.core``, so it runs in the lint venv (no
+Electrum/Qt needed) as well as the runtime venv:
+
+Run:
+    python3 tests/test_core_reminders.py
+"""
+
+import os
+import sys
+from datetime import datetime, timedelta, timezone
+
+sys.path.insert(0, __file__.rsplit("/", 2)[0])
+
+from bal.core.reminders import (  # noqa: E402  (path insert above)
+    BASIC_REMINDER_OFFSETS,
+    basic_reminder_offsets,
+    build_ics_reminders,
+    compute_reminder_offsets,
+    fold_ical_line,
+    format_time,
+    ical_escape,
+    write_temp_ics,
+)
+
+# ------------------------------------------------------------------ #
+# compute_reminder_offsets - distribution rules
+# ------------------------------------------------------------------ #
+
+
+def test_offsets_long_period_three_reminders():
+    """30-day period, 3 reminders: spread out, all before the deadline."""
+    offsets = compute_reminder_offsets(30, 3)
+    assert len(offsets) == 3
+    # All strictly before the deadline (offset >= 1 means "n days before end").
+    assert all(o >= 1 for o in offsets)
+    # Sorted earliest-first (largest offset first).
+    assert offsets == sorted(offsets, reverse=True)
+    # One reminder near the start, one near the end.
+    assert max(offsets) == 30
+    assert min(offsets) == 1
+
+
+def test_offsets_capped_at_one_per_day():
+    """Short period: at most one reminder per available day."""
+    # 2 days but 3 requested -> only 2 reminders, one per day.
+    assert compute_reminder_offsets(2, 3) == [2, 1]
+    # 1 day but 3 requested -> a single reminder, the day before the deadline.
+    assert compute_reminder_offsets(1, 3) == [1]
+
+
+def test_offsets_empty_when_no_room():
+    """No reminders when there is no day before the deadline."""
+    assert compute_reminder_offsets(0, 3) == []
+    assert compute_reminder_offsets(-5, 3) == []
+    # A non-positive count also yields nothing.
+    assert compute_reminder_offsets(30, 0) == []
+
+
+def test_offsets_never_exceed_requested_count():
+    """The number of reminders never exceeds the requested count (max 5)."""
+    offsets = compute_reminder_offsets(100, 5)
+    assert len(offsets) == 5
+    assert all(o >= 1 for o in offsets)
+    # Distinct offsets only (no duplicate alarms on the same day).
+    assert len(set(offsets)) == len(offsets)
+
+
+def test_offsets_single_reminder_is_day_before_deadline():
+    """A single requested reminder fires one day before the deadline."""
+    assert compute_reminder_offsets(30, 1) == [1]
+
+
+# ------------------------------------------------------------------ #
+# basic_reminder_offsets - fixed BASIC-mode offsets
+# ------------------------------------------------------------------ #
+
+
+def test_basic_offsets_full_period():
+    """A far-away delivery keeps all three fixed offsets (30, 10, 1)."""
+    assert basic_reminder_offsets(365) == [30, 10, 1]
+
+
+def test_basic_offsets_truncated_by_horizon():
+    """Offsets beyond the delivery horizon are dropped."""
+    assert basic_reminder_offsets(20) == [10, 1]
+    assert basic_reminder_offsets(5) == [1]
+
+
+def test_basic_offsets_empty():
+    """No future offsets when the delivery is less than a day away."""
+    assert basic_reminder_offsets(0) == []
+    assert basic_reminder_offsets(-10) == []
+
+
+def test_basic_offsets_always_from_fixed_set():
+    """Every returned offset is one of the fixed BASIC offsets."""
+    for horizon in range(0, 40):
+        result = basic_reminder_offsets(horizon)
+        assert set(result).issubset(set(BASIC_REMINDER_OFFSETS))
+
+
+# ------------------------------------------------------------------ #
+# format_time
+# ------------------------------------------------------------------ #
+
+
+def test_format_time_utc():
+    dt = datetime(2025, 6, 1, 12, 30, 45, tzinfo=timezone.utc)
+    assert format_time(dt) == "20250601T123045Z"
+
+
+def test_format_time_non_utc():
+    tz = timezone(timedelta(hours=2))
+    dt = datetime(2025, 6, 1, 12, 30, 45, tzinfo=tz)
+    assert format_time(dt) == "20250601T103045Z"
+
+
+# ------------------------------------------------------------------ #
+# ical_escape
+# ------------------------------------------------------------------ #
+
+
+def test_ical_escape_no_change():
+    assert ical_escape("hello world") == "hello world"
+
+
+def test_ical_escape_backslash():
+    assert ical_escape("a\\b") == "a\\\\b"
+
+
+def test_ical_escape_semicolon():
+    assert ical_escape("a;b") == "a\\;b"
+
+
+def test_ical_escape_comma():
+    assert ical_escape("a,b") == "a\\,b"
+
+
+def test_ical_escape_multiline():
+    text = "line1\nline2"
+    result = ical_escape(text)
+    assert "line1" in result
+    assert "line2" in result
+
+
+def test_ical_escape_all():
+    assert ical_escape("\\;,") == "\\\\\\;\\,"
+
+
+# ------------------------------------------------------------------ #
+# fold_ical_line
+# ------------------------------------------------------------------ #
+
+
+def test_fold_ical_line_short():
+    assert fold_ical_line("SUMMARY:Test") == "SUMMARY:Test"
+
+
+def test_fold_ical_line_long():
+    line = "SUMMARY:" + "a" * 100
+    result = fold_ical_line(line, limit=75)
+    parts = result.split("\r\n ")
+    assert all(len(p.encode("utf-8")) <= 75 for p in parts)
+    assert "".join(parts) == line
+
+
+def test_fold_ical_line_unicode():
+    line = "SUMMARY:" + "é" * 50
+    result = fold_ical_line(line, limit=75)
+    parts = result.split("\r\n ")
+    assert all(len(p.encode("utf-8")) <= 75 for p in parts)
+    assert "".join(parts) == line
+
+
+# ------------------------------------------------------------------ #
+# write_temp_ics
+# ------------------------------------------------------------------ #
+
+
+def test_write_temp_ics():
+    content = "BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n"
+    path = write_temp_ics(content)
+    try:
+        assert os.path.isfile(path)
+        with open(path, "rb") as f:
+            assert f.read() == content.encode("utf-8")
+    finally:
+        os.unlink(path)
+
+
+def test_write_temp_ics_empty():
+    path = write_temp_ics("")
+    try:
+        assert os.path.isfile(path)
+        with open(path, "rb") as f:
+            assert f.read() == b""
+    finally:
+        os.unlink(path)
+
+
+# ------------------------------------------------------------------ #
+# build_ics_reminders - unified builder
+# ------------------------------------------------------------------ #
+
+_LOCKTIME = datetime(2026, 7, 23, 9, 0, 0, tzinfo=timezone.utc)
+
+
+def _common_kwargs():
+    return dict(
+        locktime=_LOCKTIME,
+        description="BAL will of $wallet_name\r\n$heirs_complete",
+        summary="BAL - Will execution of $wallet_name",
+        wallet_name="karen7",
+        heirs_details=" alice - bc1qalice, bob - bc1qbob",
+        version="0.6.1",
+    )
+
+
+def test_build_ics_advanced_separate_events():
+    """ADVANCED: 30-day period -> offsets [30, 16, 1], one VEVENT each."""
+    content = build_ics_reminders(
+        basic_mode=False,
+        num_reminders=3,
+        now=datetime(2026, 7, 1, 0, 0, 0, tzinfo=timezone.utc),
+        threshold=datetime(2026, 6, 23, 0, 0, 0, tzinfo=timezone.utc),
+        **_common_kwargs(),
+    )
+    assert content is not None
+    assert content.startswith("BEGIN:VCALENDAR")
+    assert content.endswith("\r\n")
+    lines = content.split("\r\n")
+    assert lines.count("BEGIN:VEVENT") == 3
+    assert lines.count("END:VEVENT") == 3
+    assert "BEGIN:VALARM" not in lines
+    # Unique UIDs, numbered summaries, last event one day before the deadline.
+    uids = [ln for ln in lines if ln.startswith("UID:")]
+    assert len(uids) == len(set(uids)) == 3
+    assert any("(reminder 1/3)" in ln for ln in lines)
+    assert any("(reminder 3/3)" in ln for ln in lines)
+    last_dt = format_time(_LOCKTIME - timedelta(days=1))
+    assert f"DTSTART:{last_dt}" in lines
+    # Template substitution; the CRLF inside the description stays as a line
+    # break in the folded DESCRIPTION (no literal "\n" escaping in ical_escape).
+    desc = [ln for ln in lines if ln.startswith("DESCRIPTION:")]
+    assert desc and "karen7" in desc[0]
+    assert any(ln.lstrip().startswith("alice") for ln in lines)
+
+def test_build_ics_basic_uses_fixed_offsets():
+    """BASIC: fixed offsets (30, 10, 1) filtered to the future, threshold not
+    required."""
+    content = build_ics_reminders(
+        basic_mode=True,
+        now=datetime(2026, 6, 1, 0, 0, 0, tzinfo=timezone.utc),
+        **_common_kwargs(),
+    )
+    assert content is not None
+    lines = content.split("\r\n")
+    uids = [ln for ln in lines if ln.startswith("UID:")]
+    assert len(uids) == 3
+    # The first event is the 30-day offset.
+    assert "bal-karen7-30d" in uids[0]
+
+
+def test_build_ics_returns_none_when_no_reminders():
+    """No future reminder -> None (the aligned behavior), not an empty file."""
+    content = build_ics_reminders(
+        basic_mode=True,
+        now=datetime(2026, 7, 23, 0, 0, 0, tzinfo=timezone.utc),
+        **_common_kwargs(),
+    )
+    assert content is None
+
+
+def test_build_ics_advanced_requires_threshold():
+    """ADVANCED mode without a threshold is a programming error."""
+    try:
+        build_ics_reminders(basic_mode=False, **_common_kwargs())
+    except ValueError:
+        return
+    raise AssertionError("expected ValueError for missing threshold in ADVANCED")
+
+
+# ------------------------------------------------------------------ #
+# Main
+# ------------------------------------------------------------------ #
+
+if __name__ == "__main__":
+    for name in sorted(dir()):
+        if name.startswith("test_"):
+            globals()[name]()
+            print(f"  [OK] {name}")
+    print("[OK] All core reminders tests passed")

tests/test_group_d_alarms.py

@@ -10,13 +10,12 @@ Covered behaviour:
     most one reminder per available day, and never returns more reminders than
     requested.
 
-``compute_reminder_offsets`` lives in ``bal.gui.qt.widgets`` (which imports
-PyQt6), so these tests are run headless with ``QT_QPA_PLATFORM=offscreen`` like
-the other GUI tests.
+``compute_reminder_offsets`` now lives in ``bal.core.reminders`` (pure, GUI-free),
+so these tests run without Qt (or Electrum) at all.
 
 Run:
-    QT_QPA_PLATFORM=offscreen PYTHONPATH=electrum-src \
-        python3 -m pytest tests/test_group_d_alarms.py -q
+    source /home/steal/devel/bal/electrum/env/bin/activate
+    python3 tests/test_group_d_alarms.py
 """
 
 import os
@@ -25,7 +24,7 @@ import sys
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir))
 
 from bal.core.plugin_base import BalConfig
-from bal.gui.qt.widgets import compute_reminder_offsets
+from bal.core.reminders import compute_reminder_offsets
 
 # ------------------------------------------------------------------ #
 # Mocks

tests/test_group_e_mock_karen7.py

@@ -37,10 +37,14 @@ import pytest  # pyright: ignore[reportMissingImports]
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir))
 
 from bal.core.heirs import Heirs
+from bal.core.reminders import (
+    compute_reminder_offsets,
+    format_time,
+    ical_escape,
+    write_temp_ics,
+)
 from bal.core.will import HeirNotFoundException, Will, WillItem
 from bal.core.willexecutors import Willexecutors
-from bal.gui.qt.calendar import BalCalendar
-from bal.gui.qt.widgets import compute_reminder_offsets
 
 # A valid serialized Bitcoin transaction hex (1 input + 1 P2PKH output,
 # version 2).  Reused from test_core_will.py so WillItem can parse a real tx.
@@ -196,8 +200,8 @@ def test_e1_build_separate_events_for_karen7():
 
     lines = ["BEGIN:VCALENDAR", "VERSION:2.0"]
     for idx, offset in enumerate(offsets, start=1):
-        event_dt = BalCalendar.format_time(locktime - timedelta(days=offset))
-        summary = BalCalendar.ical_escape(f"{summary_base} (reminder {idx}/{total})")
+        event_dt = format_time(locktime - timedelta(days=offset))
+        summary = ical_escape(f"{summary_base} (reminder {idx}/{total})")
         lines.extend([
             "BEGIN:VEVENT",
             f"UID:bal-{wallet}-{offset}d",
@@ -219,7 +223,7 @@ def test_e1_build_separate_events_for_karen7():
     assert any("(reminder 1/3)" in ln for ln in lines)
     assert any("(reminder 3/3)" in ln for ln in lines)
     # The LAST event (offset 1) sits one day before the locktime.
-    last_dt = BalCalendar.format_time(locktime - timedelta(days=1))
+    last_dt = format_time(locktime - timedelta(days=1))
     assert f"DTSTART:{last_dt}" in lines
 
 
@@ -227,7 +231,7 @@ def test_e1_event_description_escaping():
     """Special iCalendar characters in karen7's event text are escaped so
     the .ics file stays valid."""
     raw = "Wallet karen7; heirs: alice, bob"
-    escaped = BalCalendar.ical_escape(raw)
+    escaped = ical_escape(raw)
     assert "\\;" in escaped       # semicolon escaped
     assert "\\," in escaped       # comma escaped
     assert "karen7" in escaped
@@ -245,7 +249,7 @@ def test_e1_write_temp_ics_for_karen7():
         "END:VEVENT\r\n"
         "END:VCALENDAR\r\n"
     )
-    path = BalCalendar.write_temp_ics(content)
+    path = write_temp_ics(content)
     try:
         assert os.path.isfile(path)
         with open(path, "rb") as f:

tests/test_group_g_basic_calendar.py

@@ -10,13 +10,12 @@ that would fall in the past.
 These tests pin the behaviour of the pure helper ``basic_reminder_offsets`` that
 drives that decision.
 
-``basic_reminder_offsets`` lives in ``bal.gui.qt.widgets`` (which imports
-PyQt6), so these tests are run headless with ``QT_QPA_PLATFORM=offscreen`` like
-the other GUI tests.
+``basic_reminder_offsets`` now lives in ``bal.core.reminders`` (pure, GUI-free),
+so these tests run without Qt (or Electrum) at all.
 
 Run:
-    QT_QPA_PLATFORM=offscreen PYTHONPATH=electrum-src \
-        python3 -m pytest tests/test_group_g_basic_calendar.py -q
+    source /home/steal/devel/bal/electrum/env/bin/activate
+    python3 tests/test_group_g_basic_calendar.py
 """
 
 import os
@@ -24,7 +23,7 @@ import sys
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir))
 
-from bal.gui.qt.widgets import BASIC_REMINDER_OFFSETS, basic_reminder_offsets
+from bal.core.reminders import BASIC_REMINDER_OFFSETS, basic_reminder_offsets
 
 
 def test_basic_offsets_all_future():

tests/test_group_i_basic_checkalive.py

@@ -3,116 +3,99 @@ Tests for the "BASIC mode dynamic Check Alive" fix (Group I).
 
 Background (reported by the owner): with the plugin left in BASIC mode (the
 default), the "Check Alive" (threshold) field is hidden from the user and
-stays stuck at its old/default value (roughly "today + 11 months", i.e. one
-year minus the default 30-day margin). If the user then anticipates the
-delivery time (locktime) to something earlier than that stale threshold - e.g.
-"in 1 month" - two different checks that compare locktime against
-``date_to_check`` (the resolved threshold) would incorrectly treat the will as
-"expired"/"invalid", even though the whole Check Alive concept is supposed to
-be inert in BASIC mode.
+stays stuck at its old/default value. If the user then anticipates the
+delivery time (locktime) to something earlier than that stale threshold, the
+checks that compare locktime against ``date_to_check`` would incorrectly treat
+the will as "expired"/"invalid", even though the whole Check Alive concept is
+supposed to be inert in BASIC mode.
 
-The fix (``BalWindow.compute_date_to_check``) makes ``date_to_check`` track
-the delivery time LIVE in BASIC mode, placed a fixed 2-hour margin before it,
-so it is always < locktime by construction. In ADVANCED mode nothing changes:
-the stored threshold is used as-is.
+The real fix lives in ``BalWindow.init_class_variables`` (window.py), which
+sets ``date_to_check`` to *now* in BASIC mode, and is now implemented by the
+pure policy in ``bal.core.checkalive``:
 
-These tests call the real production method directly (no GUI/Electrum wallet
-needed - it is a plain ``@staticmethod``), so they exercise the exact code
-used at runtime rather than a re-implementation.
+  * ``resolve_date_to_check(is_basic_mode, will_settings)`` - the single
+    reference timestamp: "now" in BASIC, the stored threshold in ADVANCED;
+  * ``check_alive_expired(is_basic_mode, date_to_check)`` - whether the
+    Check-Alive guard should fire (never in BASIC).
+
+These tests exercise the exact code used at runtime (no GUI/Electrum wallet
+needed, and no Qt import).
 
 Run:
-    PYTHONPATH=electrum-src python3 -m pytest tests/test_group_i_basic_checkalive.py -q
+    source /home/steal/devel/bal/electrum/env/bin/activate
+    python3 tests/test_group_i_basic_checkalive.py
 """
 
-import os
 import sys
 import time
 
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir))
+sys.path.insert(0, __file__.rsplit("/", 2)[0])
 
-from bal.gui.qt.window import BalWindow  # noqa: E402  (path insert above)
-
-OFFSET = BalWindow.BASIC_MODE_CHECK_ALIVE_OFFSET_SECONDS
+from bal.core.checkalive import (  # noqa: E402  (path insert above)
+    CheckAliveError,
+    check_alive_expired,
+    resolve_date_to_check,
+)
 
 
-def test_offset_is_two_hours():
-    """Owner-approved margin: exactly 2 hours."""
-    assert OFFSET == 2 * 60 * 60
+def test_basic_mode_resolves_to_now():
+    """BASIC mode: date_to_check is "now", never the stale stored threshold."""
+    fake_now = 1_800_000_000.0
+    result = resolve_date_to_check(True, {"threshold": time.time() + 86400}, now=fake_now)
+    assert result == fake_now
 
 
-def _relative_days_to_midnight_timestamp(days):
-    """Reproduce Util.parse_locktime_string's own normalisation: "now + N
-    days", truncated to midnight. Used to compute the expected value in
-    tests without duplicating the parsing logic itself."""
-    from datetime import datetime, timedelta
-
-    now = datetime.now()
-    return (
-        (now + timedelta(days=days))
-        .replace(hour=0, minute=0, second=0, microsecond=0)
-        .timestamp()
-    )
+def test_basic_mode_ignores_stored_threshold():
+    """BASIC + delivery anticipated to 1 month: date_to_check stays "now" and
+    does NOT jump to the old ~11-month threshold - this is the exact bug
+    scenario reported by the owner."""
+    stale_threshold = time.time() + 11 * 30 * 86400  # the old stuck value
+    fake_now = 1_800_000_000.0
+    result = resolve_date_to_check(True, {"threshold": stale_threshold}, now=fake_now)
+    assert result == fake_now
 
 
-def test_basic_mode_relative_locktime_one_year():
-    """BASIC + default "1y" delivery: date_to_check tracks it, 2h earlier."""
-    result = BalWindow.compute_date_to_check(True, "1y", "30d")
-    expected_locktime = _relative_days_to_midnight_timestamp(365)
-    assert abs(result - (expected_locktime - OFFSET)) < 5
-
-
-def test_basic_mode_anticipated_delivery_stays_consistent():
-    """BASIC + delivery anticipated to 1 month: date_to_check follows it,
-    NOT the old ~11-month threshold - this is the exact bug scenario
-    reported by the owner."""
-    stale_threshold = "30d"  # would resolve close to the OLD 1-year locktime
-    anticipated_locktime = "30d"  # user moved delivery to ~1 month from now
-    result = BalWindow.compute_date_to_check(
-        True, anticipated_locktime, stale_threshold
-    )
-    locktime_ts = _relative_days_to_midnight_timestamp(30)
-    # date_to_check must be (delivery - 2h), always strictly before delivery.
-    assert result < locktime_ts
-    assert abs((locktime_ts - OFFSET) - result) < 5
-
-
-def test_basic_mode_date_to_check_always_before_locktime():
-    """Regression guard for the reported bug: whatever the delivery date is
-    (even very close to "now"), date_to_check must stay before it."""
-    for relative_locktime in ("1d", "7d", "30d", "90d", "365d"):
-        result = BalWindow.compute_date_to_check(True, relative_locktime, "30d")
-        parsed_locktime = _relative_days_to_midnight_timestamp(
-            int(relative_locktime[:-1])
-        )
-        assert result < parsed_locktime, (
-            f"date_to_check ({result}) should be before locktime "
-            f"({parsed_locktime}) for locktime={relative_locktime}"
-        )
-
-
-def test_advanced_mode_uses_stored_threshold_unchanged():
-    """ADVANCED mode: behaviour must stay exactly as before this fix - the
-    stored threshold is used as-is, regardless of the locktime value."""
+def test_advanced_mode_uses_stored_threshold():
+    """ADVANCED mode: behaviour stays exactly as before - the stored threshold
+    is used as-is, regardless of the locktime value."""
     absolute_threshold = time.time() + 5 * 86400  # arbitrary user-chosen value
-    result = BalWindow.compute_date_to_check(False, "30d", absolute_threshold)
+    result = resolve_date_to_check(False, {"threshold": absolute_threshold})
     assert abs(result - absolute_threshold) < 1
 
 
-def test_basic_mode_falls_back_on_unparsable_locktime():
-    """If the locktime can't be parsed for any reason, BASIC mode must not
-    crash: it falls back to the stored threshold, same as ADVANCED."""
-    absolute_threshold = time.time() + 5 * 86400
-    result = BalWindow.compute_date_to_check(
-        True, {"not": "a valid locktime"}, absolute_threshold
-    )
-    assert abs(result - absolute_threshold) < 1
+def test_advanced_mode_parses_relative_threshold():
+    """ADVANCED + relative threshold ("30d") resolves to a future timestamp."""
+    result = resolve_date_to_check(False, {"threshold": "30d"})
+    assert result > time.time()
+
+
+def test_basic_mode_never_expired():
+    """BASIC mode can never be "expired": a passed check-alive date must never
+    force a postpone/rewrite of the will."""
+    assert check_alive_expired(True, time.time() - 10_000) is False
+    assert check_alive_expired(True, 1_000_000_000.0) is False
+
+
+def test_advanced_mode_expired_when_past():
+    assert check_alive_expired(False, time.time() - 10_000) is True
+
+
+def test_advanced_mode_not_expired_when_future():
+    assert check_alive_expired(False, time.time() + 10_000) is False
+
+
+def test_basic_mode_never_raises_check_alive_error():
+    """Regression guard for the reported bug: whatever the delivery date,
+    BASIC mode never raises CheckAliveError (the postpone/invalidate trigger)."""
+    date_to_check = resolve_date_to_check(True, {"threshold": "30d"})
+    assert not check_alive_expired(True, date_to_check)
+    # If it did fire, this is the exact exception that would be raised.
+    assert issubclass(CheckAliveError, Exception)
 
 
 if __name__ == "__main__":
-    test_offset_is_two_hours()
-    test_basic_mode_relative_locktime_one_year()
-    test_basic_mode_anticipated_delivery_stays_consistent()
-    test_basic_mode_date_to_check_always_before_locktime()
-    test_advanced_mode_uses_stored_threshold_unchanged()
-    test_basic_mode_falls_back_on_unparsable_locktime()
-    print("All test_group_i_basic_checkalive tests passed.")
+    for name in sorted(dir()):
+        if name.startswith("test_"):
+            globals()[name]()
+            print(f"  [OK] {name}")
+    print("[OK] All test_group_i_basic_checkalive tests passed.")

tests/test_gui_calendar.py

@@ -1,126 +1,25 @@
 """
 Tests for ``bal.gui.qt.calendar``.
 
-Covers BalCalendar static methods: format_time, ical_escape, fold_ical_line,
-write_temp_ics, open_with_default_app.
+Covers the GUI/OS glue that stayed in this module: BalCalendar.open_with_default_app.
+The RFC-5545 helpers (format_time, ical_escape, fold_ical_line, write_temp_ics)
+moved to ``bal.core.reminders`` and are tested in ``tests/test_core_reminders.py``.
 
 Run:
     QT_QPA_PLATFORM=offscreen python3 tests/test_gui_calendar.py
 """
 
-import os
 import sys
-from datetime import datetime, timezone
 
 sys.path.insert(0, __file__.rsplit("/", 2)[0])
 
 from bal.gui.qt.calendar import BalCalendar
 
-# ------------------------------------------------------------------ #
-# format_time
-# ------------------------------------------------------------------ #
-
-def test_format_time_utc():
-    dt = datetime(2025, 6, 1, 12, 30, 45, tzinfo=timezone.utc)
-    assert BalCalendar.format_time(dt) == "20250601T123045Z"
-
-
-def test_format_time_non_utc():
-    from datetime import timedelta
-    tz = timezone(timedelta(hours=2))
-    dt = datetime(2025, 1, 15, 8, 0, 0, tzinfo=tz)
-    result = BalCalendar.format_time(dt)
-    assert result.endswith("Z")
-    assert result == "20250115T060000Z"
-
-
-# ------------------------------------------------------------------ #
-# ical_escape
-# ------------------------------------------------------------------ #
-
-def test_ical_escape_no_change():
-    text = "hello world"
-    assert BalCalendar.ical_escape(text) == "hello world"
-
-
-def test_ical_escape_backslash():
-    assert BalCalendar.ical_escape("a\\b") == "a\\\\b"
-
-
-def test_ical_escape_semicolon():
-    assert BalCalendar.ical_escape("a;b") == "a\\;b"
-
-
-def test_ical_escape_comma():
-    assert BalCalendar.ical_escape("a,b") == "a\\,b"
-
-
-def test_ical_escape_multiline():
-    text = "line1\r\nline2"
-    result = BalCalendar.ical_escape(text)
-    assert "\r\n" in result
-    assert "line1" in result
-    assert "line2" in result
-
-
-def test_ical_escape_all():
-    text = "\\;,"
-    assert BalCalendar.ical_escape(text) == "\\\\\\;\\,"
-
-
-# ------------------------------------------------------------------ #
-# fold_ical_line
-# ------------------------------------------------------------------ #
-
-def test_fold_ical_line_short():
-    line = "SUMMARY:Test"
-    assert BalCalendar.fold_ical_line(line) == "SUMMARY:Test"
-
-
-def test_fold_ical_line_long():
-    line = "X-LONG:" + "a" * 100
-    result = BalCalendar.fold_ical_line(line, limit=75)
-    parts = result.split("\r\n ")
-    assert len(parts) > 1
-    assert result.startswith("X-LONG:")
-
-
-def test_fold_ical_line_unicode():
-    line = "DESCRIPTION:" + "\u20ac" * 40
-    result = BalCalendar.fold_ical_line(line, limit=75)
-    assert "\r\n " in result
-    assert "\u20ac" in result
-
-
-# ------------------------------------------------------------------ #
-# write_temp_ics
-# ------------------------------------------------------------------ #
-
-def test_write_temp_ics():
-    content = "BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n"
-    path = BalCalendar.write_temp_ics(content)
-    try:
-        assert os.path.isfile(path)
-        with open(path, "rb") as f:
-            assert f.read() == content.encode("utf-8")
-    finally:
-        os.unlink(path)
-
-
-def test_write_temp_ics_empty():
-    path = BalCalendar.write_temp_ics("")
-    try:
-        assert os.path.isfile(path)
-        with open(path, "rb") as f:
-            assert f.read() == b""
-    finally:
-        os.unlink(path)
-
-
 # ------------------------------------------------------------------ #
 # open_with_default_app
 # ------------------------------------------------------------------ #
 
+
 def test_open_with_default_app_not_found():
     result = BalCalendar.open_with_default_app(
         "/nonexistent/calendar_app", "/tmp/fake.ics"

tests/test_gui_common.py

@@ -1,7 +1,8 @@
 """
 Tests for ``bal.gui.qt.common``.
 
-Covers shown_cv, CheckAliveError, add_widget, log_error, export_meta_gui.
+Covers shown_cv, add_widget, log_error, export_meta_gui (and the
+CheckAliveError exception, which now lives in ``bal.core.checkalive``).
 
 Run:
     QT_QPA_PLATFORM=offscreen python3 tests/test_gui_common.py
@@ -44,23 +45,30 @@ def test_shown_cv_roundtrip():
 
 
 # ------------------------------------------------------------------ #
-# CheckAliveError
+# CheckAliveError (moved to bal.core.checkalive; kept tested via the
+# common->core import chain)
 # ------------------------------------------------------------------ #
 
 def test_check_alive_error_default():
-    err = common.CheckAliveError(1000000)
+    from bal.core.checkalive import CheckAliveError
+
+    err = CheckAliveError(1000000)
     assert err.timestamp_to_check == 1000000
 
 
 def test_check_alive_error_str():
-    err = common.CheckAliveError(1000000)
+    from bal.core.checkalive import CheckAliveError
+
+    err = CheckAliveError(1000000)
     s = str(err)
     assert "Check alive expired" in s
     assert "1970" in s
 
 
 def test_check_alive_error_subclass():
-    assert issubclass(common.CheckAliveError, Exception)
+    from bal.core.checkalive import CheckAliveError
+
+    assert issubclass(CheckAliveError, Exception)
 
 
 # ------------------------------------------------------------------ #

tests/test_gui_widgets.py

@@ -118,23 +118,25 @@ def test_locktime_editor_min_max():
 def test_locktime_raw_edit_replace_str():
     # replace_str only strips the day ("d") and year ("y") suffixes. The
     # block-height suffix ("b") was removed (A1), so "b" is NOT stripped
-    # anymore (locktimes are always UNIX timestamps now).
-    from bal.gui.qt.widgets import LockTimeRawEdit
-    assert LockTimeRawEdit.replace_str("123d") == "123"
-    assert LockTimeRawEdit.replace_str("456y") == "456"
+    # anymore (locktimes are always UNIX timestamps now). The helper moved to
+    # bal.core.input_rules (replace_dy_suffixes); the widget delegates to it.
+    from bal.core.input_rules import replace_dy_suffixes
+    assert replace_dy_suffixes("123d") == "123"
+    assert replace_dy_suffixes("456y") == "456"
     # "b" is left untouched (no longer a recognised suffix)
-    assert LockTimeRawEdit.replace_str("789b") == "789b"
+    assert replace_dy_suffixes("789b") == "789b"
     # only d/y are stripped; a stray "b" remains
-    assert LockTimeRawEdit.replace_str("12d34y56b") == "123456b"
+    assert replace_dy_suffixes("12d34y56b") == "123456b"
 
 
 def test_locktime_raw_edit_checkbdy():
-    from bal.gui.qt.widgets import LockTimeRawEdit
+    # checkbdy moved to bal.core.input_rules (_checkbdy).
+    from bal.core.input_rules import _checkbdy
     # character at expected position matches appendix
-    pos, s = LockTimeRawEdit.checkbdy(None, "123d", 4, "d")
+    pos, s = _checkbdy("123d", 4, "d")
     assert s == "123d"
     # character at expected position does not match
-    pos, s = LockTimeRawEdit.checkbdy(None, "123x", 4, "d")
+    pos, s = _checkbdy("123x", 4, "d")
     assert s == "123x"
 
 

tests/test_import_will_details.py

@@ -305,10 +305,14 @@ def _make_merge_fake(willitems):
         wallet=FakeWallet(),
         bal_window=None,
         date_to_check=1700000000,
+        will_settings={"threshold": 1700000000},
         bal_plugin=SimpleNamespace(
             HISTORY_LABEL=SimpleNamespace(
                 get=lambda: "BAL will history ({willexecutor})"
-            )
+            ),
+            # BASIC is the default user type; merge_will resolves date_to_check
+            # through bal.core.checkalive when it is missing.
+            is_basic_mode=lambda: True,
         ),
         update_all=lambda: calls.append("update_all"),
     )