public void TestUnregisterInstance()
{
// Initialize entities
DataWriter writer = _publisher.CreateDataWriter(_topic);
Assert.IsNotNull(writer);
TestStructDataWriter dataWriter = new TestStructDataWriter(writer);
// Unregister not registered instance
ReturnCode result = dataWriter.UnregisterInstance(new TestStruct {
Id = 1
});
Assert.AreEqual(ReturnCode.PreconditionNotMet, result);
// Register an instance
TestStruct instance1 = new TestStruct {
Id = 1
};
InstanceHandle handle1 = dataWriter.RegisterInstance(instance1);
Assert.AreNotEqual(InstanceHandle.HandleNil, handle1);
// Unregister the previous registered instance with the simplest overload
result = dataWriter.UnregisterInstance(new TestStruct {
Id = 1
});
Assert.AreEqual(ReturnCode.Ok, result);
// Register a new instance
TestStruct instance2 = new TestStruct {
Id = 2
};
InstanceHandle handle2 = dataWriter.RegisterInstance(instance2);
Assert.AreNotEqual(InstanceHandle.HandleNil, handle2);
// Unregister the previous registered instance with the handle
result = dataWriter.UnregisterInstance(new TestStruct {
Id = 2
}, handle2);
Assert.AreEqual(ReturnCode.Ok, result);
// Register a new instance
TestStruct instance3 = new TestStruct {
Id = 3
};
InstanceHandle handle3 = dataWriter.RegisterInstance(instance3);
Assert.AreNotEqual(InstanceHandle.HandleNil, handle3);
// Unregister the previous registered instance with the handle and the timestamp
result = dataWriter.UnregisterInstance(new TestStruct {
Id = 3
}, handle3, DateTime.Now.ToTimestamp());
Assert.AreEqual(ReturnCode.Ok, result);
}