internal…

gently-rm-overeager.js
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			var resolve = require('path').resolve
			var fs = require('graceful-fs')
			var test = require('tap').test
			var mkdirp = require('mkdirp')
			var rimraf = require('rimraf')

			var common = require('../common-tap.js')

			var pkg = resolve(__dirname, 'gently-rm-overeager')
			var dep = resolve(__dirname, 'test-whoops')

			var EXEC_OPTS = { cwd: pkg }

			var fixture = {
			name: '@test/whoops',
			version: '1.0.0',
			scripts: {
			postinstall: 'echo \'nope\' && exit 1'
			}
			}

			test('setup', function (t) {
			cleanup()
			setup()

			t.end()
			})

			test('cache add', function (t) {
			common.npm(['install', '../test-whoops'], EXEC_OPTS, function (er, c) {
			t.ifError(er, "test-whoops install didn't explode")
			t.ok(c, 'test-whoops install also failed')
			fs.readdir(pkg, function (er, files) {
			t.ifError(er, 'package directory is still there')
			t.deepEqual(files, ['npm-debug.log'], 'only debug log remains')

			t.end()
			})
			})
			})

			test('cleanup', function (t) {
			cleanup()

			t.end()
			})

			function cleanup () {
			rimraf.sync(pkg)
			rimraf.sync(dep)
			}

			function setup () {
			mkdirp.sync(pkg)
			// so it doesn't try to install into npm's own node_modules
			mkdirp.sync(resolve(pkg, 'node_modules'))
			mkdirp.sync(dep)
			fs.writeFileSync(resolve(dep, 'package.json'), JSON.stringify(fixture))
			}