test: test_yaml_dialog.py tests for loading/saving dialog for .yaml export

tests/test_yaml_dialog.py

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+import os
+import tempfile
+from unittest.mock import patch
+import pytest
+import yaml
+from PyQt5.QtWidgets import QWidget, QVBoxLayout, QPushButton
+
+from bec_widgets.qt_utils.yaml_dialog import load_yaml, save_yaml
+
+
+@pytest.fixture(scope="function")
+def example_widget(qtbot):
+    main_widget = QWidget()
+    layout = QVBoxLayout(main_widget)
+    main_widget.import_button = QPushButton("Import", main_widget)
+    main_widget.export_button = QPushButton("Export", main_widget)
+    layout.addWidget(main_widget.import_button)
+    layout.addWidget(main_widget.export_button)
+
+    main_widget.config = {}  # Dictionary to store the loaded configuration
+    main_widget.saved_config = None  # To store the saved configuration
+
+    qtbot.addWidget(main_widget)
+    qtbot.waitExposed(main_widget)
+    yield main_widget
+
+
+def test_load_yaml(qtbot, example_widget):
+    # Create a temporary file with YAML content
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".yaml") as temp_file:
+        temp_file.write(b"name: test\nvalue: 42")
+
+    def load_yaml_wrapper():
+        config = load_yaml(example_widget)
+        if config:
+            example_widget.config.update(config)
+
+    example_widget.import_button.clicked.connect(load_yaml_wrapper)
+
+    # Mock user selecting the file in the dialog
+    with patch("PyQt5.QtWidgets.QFileDialog.getOpenFileName", return_value=(temp_file.name, "")):
+        example_widget.import_button.click()
+
+    assert example_widget.config == {"name": "test", "value": 42}
+    os.remove(temp_file.name)  # Clean up
+
+
+def test_save_yaml(qtbot, example_widget):
+    # Create a temporary file
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".yaml") as temp_file:
+        temp_file_path = temp_file.name
+
+    # Prepare data to be saved
+    example_widget.saved_config = {"name": "test", "value": 42}
+
+    def save_yaml_wrapper():
+        save_yaml(example_widget, example_widget.saved_config)
+
+    example_widget.export_button.clicked.connect(save_yaml_wrapper)
+
+    # Mock user selecting the file in the dialog
+    with patch("PyQt5.QtWidgets.QFileDialog.getSaveFileName", return_value=(temp_file_path, "")):
+        example_widget.export_button.click()
+
+    # Check if the data was saved correctly
+    with open(temp_file_path, "r") as file:
+        saved_config = yaml.safe_load(file)
+    assert saved_config == {"name": "test", "value": 42}
+
+    os.remove(temp_file_path)  # Clean up