--- /dev/null
+var cat = require('graceful-fs').writeFileSync
+var resolve = require('path').resolve
+
+var mkdirp = require('mkdirp')
+var mr = require('npm-registry-mock')
+var rimraf = require('rimraf')
+var test = require('tap').test
+var tmpdir = require('osenv').tmpdir
+
+var common = require('../common-tap.js')
+
+var pkg = resolve(__dirname, 'ls-l-depth-0')
+var dep = resolve(pkg, 'deps', 'glock')
+var modules = resolve(pkg, 'node_modules')
+
+var expected =
+ '\n' +
+ '│ ' + pkg + '\n' +
+ '│ \n' +
+ '└── glock@1.8.7\n' +
+ ' an inexplicably hostile sample package\n' +
+ ' git+https://github.com/npm/glo.ck.git\n' +
+ ' https://glo.ck\n' +
+ '\n'
+
+var server
+
+var EXEC_OPTS = { cwd: pkg }
+
+var fixture = {
+ 'name': 'glock',
+ 'version': '1.8.7',
+ 'private': true,
+ 'description': 'an inexplicably hostile sample package',
+ 'homepage': 'https://glo.ck',
+ 'repository': 'https://github.com/npm/glo.ck',
+ 'dependencies': {
+ 'underscore': '1.5.1'
+ }
+}
+
+test('setup', function (t) {
+ setup()
+ mr({ port: common.port }, function (er, s) {
+ server = s
+
+ t.end()
+ })
+})
+
+test('#6311: npm ll --depth=0 duplicates listing', function (t) {
+ common.npm(
+ [
+ '--loglevel', 'silent',
+ '--registry', common.registry,
+ 'install', dep
+ ],
+ EXEC_OPTS,
+ function (err, code, stdout, stderr) {
+ t.ifError(err, 'npm install ran without error')
+ t.notOk(code, 'npm install exited cleanly')
+ t.notOk(stderr, 'npm install ran silently')
+ t.equal(
+ stdout.trim(),
+ 'glock@1.8.7 node_modules/glock\n└── underscore@1.5.1',
+ 'got expected install output'
+ )
+
+ common.npm(
+ [
+ '--loglevel', 'silent',
+ 'ls', '--long',
+ '--depth', '0'
+ ],
+ EXEC_OPTS,
+ function (err, code, stdout, stderr) {
+ t.ifError(err, 'npm ll ran without error')
+ t.notOk(code, 'npm ll exited cleanly')
+ t.notOk(stderr, 'npm ll ran silently')
+ t.equal(
+ stdout,
+ expected,
+ 'got expected package name'
+ )
+
+ t.end()
+ }
+ )
+ }
+ )
+})
+
+test('cleanup', function (t) {
+ cleanup()
+ server.close()
+
+ t.end()
+})
+
+function cleanup () {
+ process.chdir(tmpdir())
+ rimraf.sync(pkg)
+}
+
+function setup () {
+ cleanup()
+
+ mkdirp.sync(modules)
+ mkdirp.sync(dep)
+
+ cat(resolve(dep, 'package.json'), JSON.stringify(fixture))
+}