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Added method to get an iterator for all files in HasteFS #7010

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rubennorte
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@rubennorte rubennorte commented Sep 20, 2018

Summary

This method is faster if the consumer only want to traverse the files (no need to create a new array). It is especially relevant if the number of files in the map is large.

Test plan

Only flow typechecking. This file isn't unit tested, but the code is so simple it doesn't really need it. Manually tested in the terminal.

Edit: tested through jest-resolve-dependencies, where it's used now

@rubennorte rubennorte requested a review from mjesun September 20, 2018 13:14
@@ -44,6 +44,10 @@ export default class HasteFS {
return Array.from(this._files.keys());
}

getFileIterator(): Iterator<string> {
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@rafeca you'll be able to use this in Metro. It should be way faster if you just want to iterate over the files.

@SimenB
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SimenB commented Sep 20, 2018

Changelog? 😀

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codecov-io commented Sep 20, 2018

Codecov Report

Merging #7010 into master will increase coverage by <.01%.
The diff coverage is 100%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master    #7010      +/-   ##
==========================================
+ Coverage   66.94%   66.95%   +<.01%     
==========================================
  Files         250      250              
  Lines       10401    10404       +3     
  Branches        4        3       -1     
==========================================
+ Hits         6963     6966       +3     
  Misses       3437     3437              
  Partials        1        1
Impacted Files Coverage Δ
packages/jest-haste-map/src/haste_fs.js 58.62% <ø> (+1.47%) ⬆️
packages/jest-resolve-dependencies/src/index.js 97.72% <100%> (+0.1%) ⬆️

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@rubennorte rubennorte merged commit ee751bf into jestjs:master Sep 20, 2018
@rubennorte rubennorte deleted the add-method-to-iterate-files-in-haste-fs branch October 16, 2018 17:33
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4 participants