private async Task ClearLandmark(int id, Landmark linkedObject = null)
{
var landmarks = CreateMockLandmarkDbSet();
var context = CreateMockLocationContext(landmarks: landmarks.Object);
var service = new LocationService(context.Object);
await service.ClearLandmark(id);
if (linkedObject != null)
{
Assert.True((linkedObject.Expiry - DateTimeOffset.Now).TotalSeconds < -DateTimeTolerance);
context.Verify(c => c.SaveChangesAsync());
}
else
{
context.Verify(c => c.SaveChangesAsync(), Times.Never);
}
}