public void Cells()
{
CellsBuilder cellsBuilder = new CellsBuilder(null, null);
CellsBuilder actionBuilder = null;
Dictionary <string, CellConfig> config = null;
_builderFactory.CellsBuilder(Arg.Do <Dictionary <string, CellConfig> >(fc => config = fc))
.Returns(cellsBuilder);
RowBuilder <TableEntity> builder = _builder.Cells(fb => actionBuilder = fb);
_builderFactory.Received(1).CellsBuilder(Arg.Any <Dictionary <string, CellConfig> >());
actionBuilder.Should().BeSameAs(cellsBuilder);
_builder.Config.CellConfigs.Should().BeSameAs(config);
builder.Should().BeSameAs(_builder);
}