fix(bec_signal_proxy): timeout for blocking implemented

tests/unit_tests/test_utils_bec_signal_proxy.py

@@ -73,3 +73,52 @@ def test_bec_signal_proxy(qtbot, dap_combo_box):
     qtbot.wait(100)
     assert proxy.blocked is False
     assert proxy_container == [(("samx",),), (("samz",),)]
+
+
+def test_bec_signal_proxy_timeout(qtbot, dap_combo_box):
+    """
+    Test that BECSignalProxy auto-unblocks after the specified timeout if no manual unblock
+    occurs in the interim.
+    """
+    proxy_container = []
+
+    def proxy_callback(*args):
+        proxy_container.append(args)
+
+    # Create the proxy with a short 1-second timeout
+    proxy = BECSignalProxy(
+        dap_combo_box.x_axis_updated, rateLimit=25, slot=proxy_callback, timeout=1.0
+    )
+
+    # Initially, ensure it's not blocked
+    assert proxy.blocked is False
+
+    # Trigger the signal once (samx) -> the proxy should block
+    dap_combo_box.x_axis = "samx"
+    qtbot.waitSignal(dap_combo_box.x_axis_updated, timeout=1000)
+    qtbot.wait(100)
+    assert proxy.blocked is True
+    # The first signal should be passed immediately to the callback
+    assert proxy_container == [(("samx",),)]
+
+    # While still blocked, set another value (samz)
+    dap_combo_box.x_axis = "samz"
+    qtbot.waitSignal(dap_combo_box.x_axis_updated, timeout=1000)
+    qtbot.wait(100)
+    # Proxy is still blocked, so the callback shouldn't see "samz" yet
+    assert len(proxy_container) == 1
+
+    # Wait just under 1 second -> should still be blocked
+    qtbot.wait(700)
+    assert proxy.blocked is True
+
+    # Wait a bit more than 1 s
+    qtbot.wait(2000)
+
+    # Wait to catch the is_blocked signal that indicates it has unblocked
+    qtbot.waitSignal(proxy.is_blocked, timeout=2000)
+    # Now it should be unblocked
+    assert proxy.blocked is False
+
+    # The second value "samz" should have been forwarded after auto-unblocking
+    assert proxy_container == [(("samx",),), (("samz",),)]