Add unit test for line cross section tool

Author: PierreRaybaut

plotpy/tests/unit/test_line_cross_section_tool.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+import numpy as np
+from guidata.qthelpers import exec_dialog, qt_app_context
+
+from plotpy.interfaces.items import IImageItemType
+from plotpy.panels.csection.cswidget import LineCrossSection
+from plotpy.tests.unit.utils import create_window, drag_mouse
+from plotpy.tools import LineCrossSectionTool
+
+
+def test_line_cross_section():
+    """Test the line cross section tool."""
+    with qt_app_context(exec_loop=False) as qapp:
+        win, tool = create_window(
+            LineCrossSectionTool,
+            active_item_type=IImageItemType,
+            panels=[LineCrossSection],
+        )
+        n = 100
+        x_path = np.linspace(0.25, 0.75, n)
+        y_path = np.linspace(0.25, 0.75, n)
+        drag_mouse(win, qapp, x_path, y_path)
+
+        exec_dialog(win)
+
+
+if __name__ == "__main__":
+    test_line_cross_section()