Add test for frequential filtering application

Author: PierreRaybaut

datalab/tests/features/signal/filter_app_test.py

@@ -0,0 +1,44 @@
+# Copyright (c) DataLab Platform Developers, BSD 3-Clause license, see LICENSE file.
+
+"""
+Frequential filtering application test.
+"""
+
+# pylint: disable=invalid-name  # Allows short reference names like x, y, ...
+# guitest: show
+
+import sigima.params
+from sigima.objects import create_signal_from_param
+from sigima.tests.helpers import check_array_result
+from sigima.tests.signal.pulse.pulse_unit_test import create_test_square_params
+
+from datalab.tests import datalab_test_app_context
+
+
+def test_signal_freq_filter_app():
+    """Signal frequency filtering application test."""
+    with datalab_test_app_context(console=False) as win:
+        panel = win.signalpanel
+        s1 = create_signal_from_param(create_test_square_params())
+        panel.add_object(s1)
+        for feature, paramclass in (
+            ("lowpass", sigima.params.LowPassFilterParam),
+            ("highpass", sigima.params.HighPassFilterParam),
+            ("bandstop", sigima.params.BandStopFilterParam),
+        ):
+            for zero_padding in (True, False):
+                panel.objview.select_objects([1])  # Select the first signal
+                param = paramclass.create(method="brickwall", zero_padding=zero_padding)
+                param.update_from_obj(s1)
+                panel.processor.run_feature(feature, param)
+
+                s2 = panel.objview.get_sel_objects()[0]
+                check_array_result(
+                    f"{feature} filter output X data (zero_padding={zero_padding})",
+                    s2.x,
+                    s1.x,
+                )
+
+
+if __name__ == "__main__":
+    test_signal_freq_filter_app()