public void TestClear()
{
var properties = new PropertiesBufferList();
var sourceCannotBeAccessed = new SourceDoesNotExist("wdawdwaw.txt");
properties.SetValue(Core.Properties.EmptyReason, sourceCannotBeAccessed);
properties.SetValue(Core.Properties.PercentageProcessed, Percentage.Of(50, 100));
properties.Clear();
properties.Properties.Should().BeEmpty();
properties.GetValue(Core.Properties.EmptyReason).Should().Be(Core.Properties.EmptyReason.DefaultValue);
properties.GetValue(Core.Properties.PercentageProcessed).Should().Be(Core.Properties.PercentageProcessed.DefaultValue);
properties.TryGetValue(Core.Properties.EmptyReason, out _).Should().BeFalse();
properties.TryGetValue(Core.Properties.PercentageProcessed, out _).Should().BeFalse();
}