anchor.diff:      ExpectedResult = fractalHelpers:computeAllRowsOfFractalData(ConfigMap),
       ok.
   
  +testMakePng(_Config) ->
  +    %% set up some config
  +    FractalImageFileName = "test.example01c.png",  %image file created
  +    ConfigMap = #{ fractalAlg => julian,  % Fractal Algorithm is julian
  +                   imageFileName => FractalImageFileName,
  +                   colorAlg      => simplest,  % 0-11 map to colors
  +                   width         => 10,        % width=10
  +                   height        => 10,        % height=10
  +                   cReal         => 0.5,       % real portion of C0
  +                   cImaginary    => -0.5,      % imaginary portion of C0
  +                   zReal         => -0.1,      % real portion of Z0 (na Julian)
  +                   zImaginary    => -0.1,      % imaginary portion of Z0 (na Julian)
  +                   xRealRight    => 3.0,
  +                   xRealLeft     => -3.0,
  +                   yImaginaryLow => -3.0,
  +                   yImaginaryHigh => 3.0,
  +                   bailoutThreshold => 4,
  +                   maxIterationThreshold => 11,
  +                   timeout       => 5000 },
  +
  +    %% set up some expected results
  +    RefFileSize = 145,
  +    RefPngData = <<137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,10,
  +                   0,0,0,10,8,3,0,0,0,186,236,63,143,0,0,0,36,80,76,84,69,
  +                   255,255,255,0,255,255,0,0,255,255,0,0,0,255,0,255,255,
  +                   0,210,180,140,240,128,128,255,165,0,128,128,0,255,0,
  +                   255,0,0,0,205,64,91,207,0,0,0,40,73,68,65,84,120,156,
  +                   99,96,192,5,24,129,0,202,98,102,101,129,178,25,153,88,
  +                   216,152,96,76,54,22,24,147,145,133,149,153,17,93,27,22,
  +                   0,0,15,120,0,71,22,14,92,252,0,0,0,0,73,69,78,68,174,
  +                   66,96,130>>,
  +
  +    %% create fractal data, make image,  and put image into a file
  +    ok = fractalHelpers:makePng(ConfigMap),
  +
  +    %% is png right size?
  +    { ok, { file_info, OutputFileSize, _reg,_rw,_t1,_t2,_t3,_,_,_,_,_,_,_} } =
  +            file:read_file_info(FractalImageFileName),
  +    RefFileSize  = OutputFileSize,
  +
  +    %% is png right content?
  +    { ok, RefPngData} = file:read_file(FractalImageFileName),
  +
  +    ok.
  +
  +testMakePngUsingPool(_Config) ->
  +    %% set up some config
  +    FractalImageFileName = "test.example01d.png",  %image file created
  +    ConfigMap = #{ fractalAlg => julian,  % Fractal Algorithm is julian
  +                   imageFileName => FractalImageFileName,
  +                   colorAlg      => simplest,  % 0-11 map to colors
  +                   width         => 10,        % width=10
  +                   height        => 10,        % height=10
  +                   cReal         => 0.5,       % real portion of C0
  +                   cImaginary    => -0.5,      % imaginary portion of C0
  +                   zReal         => -0.1,      % real portion of Z0 (na Julian)
  +                   zImaginary    => -0.1,      % imaginary portion of Z0 (na Julian)
  +                   xRealRight    => 3.0,
  +                   xRealLeft     => -3.0,
  +                   yImaginaryLow => -3.0,
  +                   yImaginaryHigh => 3.0,
  +                   bailoutThreshold => 4,
  +                   maxIterationThreshold => 11,
  +                   timeout       => 5000 },
  +
  +    %% set up some expected results
  +    RefFileSize = 145,
  +    RefPngData = <<137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,10,
  +                   0,0,0,10,8,3,0,0,0,186,236,63,143,0,0,0,36,80,76,84,69,
  +                   255,255,255,0,255,255,0,0,255,255,0,0,0,255,0,255,255,
  +                   0,210,180,140,240,128,128,255,165,0,128,128,0,255,0,
  +                   255,0,0,0,205,64,91,207,0,0,0,40,73,68,65,84,120,156,
  +                   99,96,192,5,24,129,0,202,98,102,101,129,178,25,153,88,
  +                   216,152,96,76,54,22,24,147,145,133,149,153,17,93,27,22,
  +                   0,0,15,120,0,71,22,14,92,252,0,0,0,0,73,69,78,68,174,
  +                   66,96,130>>,
  +
  +    %% create fractal data, make image,  and put image into a file
  +    ok = fractalHelpers:makePngUsingPool(ConfigMap),
  +
  +    %% is png right size?
  +    { ok, { file_info, OutputFileSize, _reg,_rw,_t1,_t2,_t3,_,_,_,_,_,_,_} } =
  +            file:read_file_info(FractalImageFileName),
  +    RefFileSize  = OutputFileSize,
  +
  +    %% is png right content?
  +    { ok, RefPngData} = file:read_file(FractalImageFileName),
  +
  +    ok.
  
positive.code: %%%-------------------------------------------------------------------
  %%% @author Duncan Sparrell
  %%% @copyright (C) 2015, sFractal Consulting LLC
  %%% 
  %%%-------------------------------------------------------------------
  
  -module(fractalHelpers_SUITE).
  
negative.code:     ok.
  
  testYList(_Config) ->
      %% setup some test config
      ConfigMap = #{ fractalAlg => julian,  % Fractal Algorithm is julian
         width => 5,
         height => 5,
         cReal => 0.1, % real portion of C0
         cImaginary => -0.1, % imaginary portion of C0
         zReal => -0.1, %real portion of Z0 (don't care for Julian)
  