Allow parser to handle some missing fields (costs, forces, categories…

[capajon]

…, rules, selections, profiles)

Hi, first thanks for making this project. It's great and very helpful.

I noticed that some (actually most) of the roster files I had previously created in battlescribe error out. I think there are some fields that are not always present (arrays of things, listed above), and the code errors out trying to iterate on them. I'm not an expert on the schema though, but this was output by battlescribe itself.

The simplest solution seemed to be defaulting those to empty arrays in each of the relevant Parser functions. You might know of a better approach though. My apologies too if I'm not following typescript best practices as I am still picking that up.

I also added a test ros file to cover this in your test suite. Not sure if you wanted actual 40k references in your repo though, but I didn't have time to scrub it. It is based on the rosz file I was mostly trying. While I was adding that I refactored the test case a bit to be able to add more test files easily in the future, as no doubt there might be other rosz files that cause a problem, potentially. I figure it will be nice to add odd ball ones as they are discovered.

[codecov]

Codecov Report

Merging #3 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master       #3   +/-   ##
=======================================
  Coverage   99.36%   99.36%           
=======================================
  Files          20       20           
  Lines        1096     1096           
  Branches      176      177    +1     
=======================================
  Hits         1089     1089           
  Misses          3        3           
  Partials        4        4           

Impacted Files	Coverage Δ
src/Parser.ts	99.55% <100.00%> (ø)

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[oscarviq]

@GitHug This probably needs to be pulled?

I just tried to parse a roster for Warhammer 40k and got this error

/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:128
        bsForces.forEach(function (bsForces) {
^
TypeError: Cannot read property 'forEach' of undefined
    at Parser../node_modules/rosz2js/dist/src/Parser.js.Parser.toForceArray (/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:128:1)
    at /Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:137:1
    at Array.forEach (<anonymous>)
    at /Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:130:1
    at Array.forEach (<anonymous>)
    at Parser../node_modules/rosz2js/dist/src/Parser.js.Parser.toForceArray (/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:128:1)
    at Parser.<anonymous> (/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:74:1)
    at step (/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:33:1)
    at Object.next (/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:14:45)
    at fulfilled (/Users/oscarviquez/Code/the-army-summoner/dist/apps/api/webpack:/node_modules/rosz2js/dist/src/Parser.js:5:42)
    at processTicksAndRejections (node:internal/process/task_queues:93:5)

Did a test using capajon's branch and it works. It's a simple fix but it looks like the PR has been sitting there with no merge.