[FIX] make sure running tsvread then tsvwrite does not change the file content

[Remi-Gau]

fixes #156

• run test on some data from bids example and not an extra tsv file
• support saving row wise structure? This could be pushed to later.

The classic structure tends to not work where mixing types.

  logFile.onset = [2; NaN];
  logFile.trial_type = {'motion_up'; 'static'};
  logFile.duration = [1; 4];
  logFile.speed = [NaN; 4];
  logFile.is_fixation = {'true'; '3'};

  % Leads to trouble
  %   logFile.is_fixation = {'true';3};
  %   logFile.is_fixation = {true;3}; 

For example mixing logical and numeric does not work in a cell: it prints to the file but the test fails afterwards.

But the previous structure format could allow mixing the format of elements that would end up in the same column of the tsv.

  logFile(1, 1).onset = 2;
  logFile(1, 1).trial_type = 'motion_up';
  logFile(1, 1).duration = 1;
  logFile(1, 1).speed = [];
  logFile(1, 1).is_fixation = true;

  logFile(2, 1).onset = NaN;
  logFile(2, 1).trial_type = 'static';
  logFile(2, 1).duration = 4;
  logFile(2, 1).speed = 4;
  logFile(2, 1).is_fixation = 3;

So we could support this too.

[Remi-Gau]

No rush to make a decision on this. If I don't hear back I will silence the test and we can revisit the issue later. :-)

[codecov]

Codecov Report

Merging #160 (1dd2d2e) into master (cca6d50) will not change coverage.
The diff coverage is 0.00%.

@@          Coverage Diff           @@
##           master    #160   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files          11      11           
  Lines         864     864           
======================================
  Misses        864     864           

Flag	Coverage Δ
unittests	0.00% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
+bids/+internal/file_utils.m	0.00% <0.00%> (ø)
+bids/+util/tsvwrite.m	0.00% <0.00%> (ø)

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