MAINT-21: tests read and patch the Controller through tools/main_files.py

Prepares the split of app/main.py's Controller into files by job, with no app
change. tools/main_files.py gives a test the text and the AST of main.py plus
the files split from it, and `live`, which sets a global in every file whose
functions read it (and raises when none does). Tests that read main.py's
source, and tests and replay tools that patch a main global (datetime,
compute, resolve, _mono, WRITE_BUDGET_S, ...), go through it, so they pass on
this layout and on the split one. test_split_patches.py fails when a test or
tool patches an app.main attribute that main.py no longer reads, or that
another file also reads. tools/maint21_same_ast.py proves every function,
method and module-level assignment of main.py at the base is found unchanged
in its new file.

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

goodwe_controller/test_refusal.py

@@ -142,8 +142,11 @@ def run(load, cut, dur, cap=lambda t: 1e9, old=False, events=None):
             **LIVE), hass, _Store(), _Pub(), stop=asyncio.Event())
         c.auto = True
         c.dev_min, c.dev_max = -LIVE["max_w"], LIVE["max_w"]
+        import os  # noqa: E402
+        sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "tools"))  # noqa: E402
+        import main_files  # noqa: E402
         import app.main as m
-        real, real_dt = m.compute, m.datetime
+        real, real_dt = main_files.live.compute, main_files.live.datetime
         clock = [0.0]
 
         class _DT(real_dt):
@@ -153,9 +156,9 @@ def run(load, cut, dur, cap=lambda t: 1e9, old=False, events=None):
             def now(cls, tz=None):
                 return BASE + timedelta(seconds=clock[0])
 
-        m.datetime = _DT
+        main_files.live.datetime = _DT
         if old:
-            m.compute = lambda *a, **k: real(*a, **dict(k, refused=None))
+            main_files.live.compute = lambda *a, **k: real(*a, **dict(k, refused=None))
         rows, trips, was = [], 0, False
         try:
             t = 0.0
@@ -174,7 +177,7 @@ def run(load, cut, dur, cap=lambda t: 1e9, old=False, events=None):
                              hass.cmd, c.i_w, c.loop_reason, c.batt_refused))
                 t += TICK
         finally:
-            m.compute, m.datetime = real, real_dt
+            main_files.live.compute, main_files.live.datetime = real, real_dt
         return rows, trips, c
     return asyncio.run(go())