test-npm-install.js fails with Node.js 11.10.0

[richardlau]

From #679 (comment):
We have a test failure (test-npm-install.js) on Node.js 11.10.0 (which comes with a new npm): https://travis-ci.com/nodejs/citgm/jobs/178283173#L468-L869

[richardlau]

So this is similar to #577. In Node.js 11.10.0 npm has been updated and npm has had an internal rewrite that has resulted in the message changing again.

For reference:
On npm 3.10.10 (Node.js 6):

npm ERR! code E404

npm ERR! 404 Not found : THIS-WILL-FAIL
npm ERR! 404
npm ERR! 404  'THIS-WILL-FAIL' is not in the npm registry.
npm ERR! 404 Your package name is not valid, because
npm ERR! 404  1. name can no longer contain capital letters
npm ERR! 404 It was specified as a dependency of 'omg-bad-tree'
npm ERR! 404
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.

npm 6.4.1 (Node.js 8 and 10):

npm ERR! code E404
npm ERR! 404 Not Found: THIS-WILL-FAIL@0.0.1

npm 6.7.0 (Node.js 11.10.0):

npm ERR! code E404
npm ERR! 404 Not Found - GET https://registry.npmjs.org/THIS-WILL-FAIL - Not found
npm ERR! 404
npm ERR! 404  'THIS-WILL-FAIL@0.0.1' is not in the npm registry.
npm ERR! 404 Your package name is not valid, because
npm ERR! 404  1. name can only contain URL-friendly characters
npm ERR! 404  2. name can no longer contain capital letters
npm ERR! 404 It was specified as a dependency of 'omg-bad-tree'
npm ERR! 404
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.

citgm/test/npm/test-npm-install.js

Line 128 in 27c6eb9

testError: /npm ERR! 404 Not [Ff]ound\s*: THIS-WILL-FAIL(@0\.0\.1)?/

[richardlau]

Proposed fix in #681.