Add config option to skip Touchup step, for debugging purposes (#2361)

Co-authored-by: Adam Hopkins <adam@amhopkins.com>

tests/test_touchup.py

@@ -2,6 +2,8 @@ import logging
 
 import pytest
 
+from sanic_routing.exceptions import NotFound
+
 from sanic.signals import RESERVED_NAMESPACES
 from sanic.touchup import TouchUp
 
@@ -28,3 +30,50 @@ async def test_ode_removes_dispatch_events(app, caplog, verbosity, result):
             )
             in logs
         ) is result
+
+
+@pytest.mark.parametrize("skip_it,result", ((False, True), (True, False)))
+async def test_skip_touchup(app, caplog, skip_it, result):
+    app.config.TOUCHUP = not skip_it
+    with caplog.at_level(logging.DEBUG, logger="sanic.root"):
+        app.state.verbosity = 2
+        await app._startup()
+    assert app.signal_router.allow_fail_builtin is (not skip_it)
+    logs = caplog.record_tuples
+
+    for signal in RESERVED_NAMESPACES["http"]:
+        assert (
+            (
+                "sanic.root",
+                logging.DEBUG,
+                f"Disabling event: {signal}",
+            )
+            in logs
+        ) is result
+    not_found_exceptions = 0
+    # Skip-touchup disables NotFound exceptions on the dispatcher
+    for signal in RESERVED_NAMESPACES["http"]:
+        try:
+            await app.dispatch(event=signal, inline=True)
+        except NotFound:
+            not_found_exceptions += 1
+    assert (not_found_exceptions > 0) is result
+
+
+@pytest.mark.parametrize("skip_it,result", ((False, True), (True, True)))
+async def test_skip_touchup_non_reserved(app, caplog, skip_it, result):
+    app.config.TOUCHUP = not skip_it
+
+    @app.signal("foo.bar.one")
+    def sync_signal(*_):
+        ...
+
+    await app._startup()
+    assert app.signal_router.allow_fail_builtin is (not skip_it)
+    not_found_exception = False
+    # Skip-touchup doesn't disable NotFound exceptions for user-defined signals
+    try:
+        await app.dispatch(event="foo.baz.two", inline=True)
+    except NotFound:
+        not_found_exception = True
+    assert not_found_exception is result