test: signal: Add additional disconnection tests for Object

Add two tests that exercise the Signal::disconnect(Object *) and
Signal::disconnect() methods, to verify that they correctly remove the
signal from the connected object's list of signals. This triggers an
issue that was detected through manual code inspection, and is expected
to crash or at least generate valgrind warnings.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

1 files changed, 24 insertions, 0 deletions

diff --git a/test/signal.cpp b/test/signal.cpp
index 0054ed5a..f83ceb05 100644
--- a/test/signal.cpp
+++ b/test/signal.cpp
@@ -220,6 +220,30 @@ protected:
 		delete dynamicSignal;
 		delete slotObject;
 
+		/*
+		 * Test that signal manual disconnection from Object removes
+		 * the signal for the object. This shall not generate any
+		 * valgrind warning.
+		 */
+		dynamicSignal = new Signal<>();
+		slotObject = new SlotObject();
+		dynamicSignal->connect(slotObject, &SlotObject::slot);
+		dynamicSignal->disconnect(slotObject);
+		delete dynamicSignal;
+		delete slotObject;
+
+		/*
+		 * Test that signal manual disconnection from all slots removes
+		 * the signal for the object. This shall not generate any
+		 * valgrind warning.
+		 */
+		dynamicSignal = new Signal<>();
+		slotObject = new SlotObject();
+		dynamicSignal->connect(slotObject, &SlotObject::slot);
+		dynamicSignal->disconnect();
+		delete dynamicSignal;
+		delete slotObject;
+
 		/* Exercise the Object slot code paths. */
 		slotObject = new SlotObject();
 		signalVoid_.connect(slotObject, &SlotObject::slot);