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import os
import sys
from pathlib import Path
from unittest.mock import Mock, call
import pytest
from psygnal import EmissionInfo, Signal, SignalGroup
from psygnal.utils import decompile, monitor_events, recompile
def test_event_debugger(capsys) -> None:
"""Test that the event debugger works"""
class M:
sig = Signal(int, int)
m = M()
_logger = Mock()
assert not m.sig._slots
with monitor_events(m, _logger):
assert len(m.sig._slots) == 1
m.sig.emit(1, 2)
m.sig.emit(3, 4)
assert _logger.call_count == 2
_logger.assert_has_calls(
[call(EmissionInfo(m.sig, (1, 2))), call(EmissionInfo(m.sig, (3, 4)))]
)
assert not m.sig._slots
with monitor_events(m):
m.sig.emit(1, 2)
m.sig.emit(3, 4)
captured = capsys.readouterr()
assert captured.out == "sig.emit(1, 2)\nsig.emit(3, 4)\n"
def test_old_monitor_api_dep_warning() -> None:
class M:
sig = Signal(int, int)
mock = Mock()
def _monitor(signal_name: str, args: tuple) -> None:
mock(signal_name, args)
m = M()
with pytest.warns(
UserWarning, match="logger functions must now take a single argument"
):
with monitor_events(m, logger=_monitor): # type: ignore
m.sig.emit(1, 2)
mock.assert_called_once_with("sig", (1, 2))
with pytest.raises(ValueError, match="logger function must take a single argument"):
with monitor_events(logger=_monitor): # type: ignore
m.sig.emit(1, 2)
mock.reset_mock()
with monitor_events(m, logger=mock):
m.sig.emit(1, 2)
mock.assert_called_once_with(EmissionInfo(m.sig, (1, 2)))
# global monitor
mock.reset_mock()
with monitor_events(logger=mock):
m.sig.emit(1, 2)
mock.assert_called_once_with(EmissionInfo(m.sig, (1, 2)))
def test_monitor_all() -> None:
class M:
sig = Signal(int, int)
m1 = M()
m2 = M()
_logger = Mock()
with monitor_events(logger=_logger):
m1.sig.emit(1, 2)
m2.sig.emit(3, 4)
m1.sig.emit(5, 6)
m2.sig.emit(7, 8)
assert _logger.call_args_list == [
call(EmissionInfo(m1.sig, (1, 2))),
call(EmissionInfo(m2.sig, (3, 4))),
call(EmissionInfo(m1.sig, (5, 6))),
call(EmissionInfo(m2.sig, (7, 8))),
]
def test_monitor_group() -> None:
class MyGroup(SignalGroup):
sig1 = Signal(int, int)
sig2 = Signal(str, str)
m1 = MyGroup()
m2 = MyGroup()
_logger = Mock()
with monitor_events(logger=_logger):
m1.sig1.emit(1, 2)
m2.sig1.emit(3, 4)
m1.sig1.emit(5, 6)
m2.sig1.emit(7, 8)
m1.sig2.emit("9", "10")
m2.sig2.emit("11", "12")
assert _logger.call_args_list == [
call(EmissionInfo(m1.sig1, (1, 2))),
call(EmissionInfo(m2.sig1, (3, 4))),
call(EmissionInfo(m1.sig1, (5, 6))),
call(EmissionInfo(m2.sig1, (7, 8))),
call(EmissionInfo(m1.sig2, ("9", "10"))),
call(EmissionInfo(m2.sig2, ("11", "12"))),
]
@pytest.mark.skipif(os.name == "nt", reason="rewrite open files on Windows is buggy")
def test_decompile_recompile(monkeypatch):
import psygnal
was_compiled = psygnal._compiled
decompile()
monkeypatch.delitem(sys.modules, "psygnal")
monkeypatch.delitem(sys.modules, "psygnal._signal")
import psygnal
assert not psygnal._compiled
if was_compiled:
assert list(Path(psygnal.__file__).parent.rglob("**/*_BAK"))
recompile()
monkeypatch.delitem(sys.modules, "psygnal")
monkeypatch.delitem(sys.modules, "psygnal._signal")
import psygnal
assert psygnal._compiled
def test_debug_import(monkeypatch):
"""Test that PSYGNAL_UNCOMPILED gives a warning."""
monkeypatch.delitem(sys.modules, "psygnal")
monkeypatch.setenv("PSYGNAL_UNCOMPILED", "1")
with pytest.warns(UserWarning, match="PSYGNAL_UNCOMPILED no longer has any effect"):
import psygnal # noqa: F401
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