[wp-trac] [WordPress Trac] #49621: Travis: Download Chromium for e2e tests only

[WordPress Trac]

#49621: Travis: Download Chromium for e2e tests only
------------------------------+--------------------
 Reporter:  SergeyBiryukov    |      Owner:  (none)
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  5.4
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:
  Focuses:                    |
------------------------------+--------------------
 Every other commit or so, tests randomly fail with a message like this:
 {{{
 > puppeteer at 2.1.1 install /home/travis/build/WordPress/wordpress-
 develop/node_modules/puppeteer
 > node install.js
 ERROR: Failed to download Chromium r722234! Set
 "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" env variable to skip download.
 { Error: read ECONNRESET
     at TLSWrap.onStreamRead (internal/stream_base_commons.js:111:27)
   -- ASYNC --
     at BrowserFetcher.<anonymous> (/home/travis/build/WordPress/wordpress-
 develop/node_modules/puppeteer/lib/helper.js:111:15)
     at Object.<anonymous> (/home/travis/build/WordPress/wordpress-
 develop/node_modules/puppeteer/install.js:66:16)
     at Module._compile (internal/modules/cjs/loader.js:688:30)
     at Object.Module._extensions..js
 (internal/modules/cjs/loader.js:699:10)
     at Module.load (internal/modules/cjs/loader.js:598:32)
     at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
     at Function.Module._load (internal/modules/cjs/loader.js:529:3)
     at Function.Module.runMain (internal/modules/cjs/loader.js:741:12)
     at startup (internal/bootstrap/node.js:285:19)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3) errno:
 'ECONNRESET', code: 'ECONNRESET', syscall: 'read' }
 npm ERR! code ELIFECYCLE
 npm ERR! errno 1
 npm ERR! puppeteer at 2.1.1 install: `node install.js`
 npm ERR! Exit status 1
 npm ERR!
 npm ERR! Failed at the puppeteer at 2.1.1 install script.
 }}}

 Chromium is only needed for e2e tests and should not be downloaded for PHP
 or JS tests.

 This will also speed up the tests a bit by not downloading ~120 MB over
 and over again on every run.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/49621>
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