"""Tests for the ApiInspector (signal connection auditor)."""
import pytest
from qt_mcp.probe.api_inspector import ApiInspector
@pytest.fixture()
def api_inspector(registry):
return ApiInspector(registry)
def test_signals_on_button(qapp, sample_window, api_inspector, registry):
from PySide6.QtWidgets import QPushButton
btn = sample_window.findChild(QPushButton, "IncrementButton")
assert btn is not None
ref = registry.register(btn, prefix="w")
result = api_inspector.signals(ref)
assert result["class"] == "QPushButton"
assert result["object_name"] == "IncrementButton"
# QPushButton has clicked signal
sig_names = [s["name"] for s in result["signals"]]
assert "clicked" in sig_names
# clicked should be connected (sample_app connects it)
clicked = next(s for s in result["signals"] if s["name"] == "clicked")
assert clicked["connected"] is True
assert clicked["receiver_count"] >= 1
def test_signals_unconnected(qapp, api_inspector, registry):
from PySide6.QtWidgets import QPushButton
btn = QPushButton("Lonely")
btn.setObjectName("LonelyButton")
ref = registry.register(btn, prefix="w")
result = api_inspector.signals(ref)
clicked = next(s for s in result["signals"] if s["name"] == "clicked")
assert clicked["connected"] is False
assert clicked["receiver_count"] == 0
def test_signals_after_disconnect(qapp, api_inspector, registry):
from PySide6.QtWidgets import QPushButton
btn = QPushButton("Toggle")
ref = registry.register(btn, prefix="w")
handler = lambda: None # noqa: E731
btn.clicked.connect(handler)
r1 = api_inspector.signals(ref)
clicked1 = next(s for s in r1["signals"] if s["name"] == "clicked")
assert clicked1["connected"] is True
btn.clicked.disconnect(handler)
r2 = api_inspector.signals(ref)
clicked2 = next(s for s in r2["signals"] if s["name"] == "clicked")
assert clicked2["connected"] is False
def test_signals_non_qobject_raises(qapp, api_inspector, registry):
"""Passing a non-QObject ref should raise ValueError."""
from PySide6.QtWidgets import QTreeWidgetItem
item = QTreeWidgetItem(["test"])
ref = registry.register(item, prefix="i")
with pytest.raises(ValueError, match="not a QObject"):
api_inspector.signals(ref)
def test_signals_lists_all_signals(qapp, api_inspector, registry):
"""A QLineEdit should have textChanged, returnPressed, etc."""
from PySide6.QtWidgets import QLineEdit
edit = QLineEdit()
ref = registry.register(edit, prefix="w")
result = api_inspector.signals(ref)
sig_names = [s["name"] for s in result["signals"]]
assert "textChanged" in sig_names
assert "returnPressed" in sig_names
