public void BlockLoglevelsFromToInverted_Should_AddLoglevel()
        {
            var builder = new LogfileConfigurationBuilder <StandardLoglevel>();

            LogfileConfigurationBuilderExtensions.BlockLoglevels <StandardLoglevel>(builder, StandardLoglevel.Warning, StandardLoglevel.Error);
            builder.BlockLoglevels.Count.Should().Be(2);
            builder.BlockLoglevels.Should().Contain(StandardLoglevel.Warning);
            builder.BlockLoglevels.Should().Contain(StandardLoglevel.Error);
        }
 public void BlockLoglevelFromToSelfNull_ShouldThrow_ArgumentNullException()
 {
     Assert.Throws <ArgumentNullException>(() => LogfileConfigurationBuilderExtensions.BlockLoglevels <StandardLoglevel>(null, StandardLoglevel.Warning, StandardLoglevel.Error));
 }