test(scan_history): add initial tests

tests/unit_tests/test_scan_history_browser.py

@@ -0,0 +1,76 @@
+from unittest import mock
+
+import pytest
+from bec_lib.messages import ScanHistoryMessage
+from pytestqt import qtbot
+from qtpy import QtCore
+
+from bec_widgets.widgets.services.scan_history_browser.components import (
+    ScanHistoryDeviceViewer,
+    ScanHistoryMetadataViewer,
+    ScanHistoryView,
+)
+
+from .client_mocks import mocked_client
+
+
+@pytest.fixture
+def scan_history_msg():
+    """Fixture to create a mock ScanHistoryMessage."""
+    yield ScanHistoryMessage(
+        scan_id="test_scan",
+        dataset_number=1,
+        scan_number=1,
+        scan_name="Test Scan",
+        file_path="/path/to/scan",
+        start_time=1751957906.3310962,
+        end_time=1751957907.3310962,  # 1s later
+        exit_status="closed",
+        num_points=10,
+        request_inputs={"some_input": "value"},
+        device_data_info={"device1": 10, "device2": 20, "device3": 1},
+    )
+
+
+@pytest.fixture
+def scan_history_device_viewer(qtbot, mocked_client):
+    widget = ScanHistoryDeviceViewer(client=mocked_client)
+    qtbot.addWidget(widget)
+    qtbot.waitExposed(widget)
+    yield widget
+
+
+def test_scan_history_device_viewer_init(scan_history_device_viewer):
+    """Test the initialization of ScanHistoryDeviceViewer."""
+    assert scan_history_device_viewer.scan_history_msg is None
+    assert scan_history_device_viewer._selected_device == ""
+    assert scan_history_device_viewer.device_model.devices == []
+    assert scan_history_device_viewer.device_model.rowCount() == 0
+
+
+def test_scan_history_device_viewer_update_logic(
+    qtbot, scan_history_device_viewer, scan_history_msg
+):
+    """Test updating devices from scan history."""
+    # Update with first scan history message
+    assert scan_history_device_viewer.scan_history_msg is None
+    scan_history_device_viewer.update_devices_from_scan_history(scan_history_msg)
+    assert scan_history_device_viewer.scan_history_msg == scan_history_msg
+    assert scan_history_device_viewer.device_model.devices == [
+        ("device2", 20),
+        ("device1", 10),
+        ("device3", 1),
+    ]  # sorted by number of points
+    with qtbot.waitExposed(scan_history_device_viewer.device_combo.view()):
+        qtbot.mouseClick(scan_history_device_viewer.device_combo, qtbot.MouseButton.LeftButton)
+    # qtbot.waitExposed(scan_history_device_viewer.device_combo.view())
+    index = scan_history_device_viewer.device_combo.model().index(1, 0)
+    rect = scan_history_device_viewer.device_combo.view().visualRect(index)
+    with qtbot.waitExposed(scan_history_device_viewer.device_combo.currentIndexChanged):
+        qtbot.mouseClick(
+            scan_history_device_viewer.device_combo.view().viewport(),
+            QtCore.Qt.LeftButton,
+            pos=rect.center(),
+        )
+
+    # Now