1 files changed, 86 insertions, 0 deletions
diff --git a/deps/npm/test/tap/prune-dev-dep-cycle.js b/deps/npm/test/tap/prune-dev-dep-cycle.js
new file mode 100644
index 0000000000..5ccabdc1c9
--- /dev/null
+++ b/deps/npm/test/tap/prune-dev-dep-cycle.js
@@ -0,0 +1,86 @@
+'use strict'
+var fs = require('fs')
+var path = require('path')
+var test = require('tap').test
+var Tacks = require('tacks')
+var File = Tacks.File
+var Dir = Tacks.Dir
+var common = require('../common-tap.js')
+var testdir = path.join(__dirname, path.basename(__filename, '.js'))
+
+var fixture = new Tacks(
+  Dir({
+    node_modules: Dir({
+      'a': Dir({
+        'package.json': File({
+          _requested: {
+            rawSpec: 'file:///mods/a'
+          },
+          dependencies: {
+            'b': 'file:///mods/b'
+          },
+          name: 'a',
+          version: '1.0.0'
+        })
+      }),
+      'b': Dir({
+        'package.json': File({
+          _requested: {
+            rawSpec: 'file:///mods/b'
+          },
+          dependencies: {
+            'a': 'file:///mods/a'
+          },
+          name: 'b',
+          version: '1.0.0'
+        })
+      })
+    }),
+    'package.json': File({
+      name: 'test',
+      version: '1.0.0',
+      devDependencies: {
+        'a': 'file:///mods/a'
+      }
+    })
+  })
+)
+
+function setup () {
+  cleanup()
+  fixture.create(testdir)
+}
+
+function cleanup () {
+  fixture.remove(testdir)
+}
+
+test('setup', function (t) {
+  setup()
+  t.end()
+})
+
+function readdir (dir) {
+  try {
+    return fs.readdirSync(dir)
+  } catch (ex) {
+    if (ex.code === 'ENOENT') return []
+    throw ex
+  }
+}
+
+test('prune cycle in dev deps', function (t) {
+  common.npm(['prune', '--production', '--json'], {cwd: testdir}, function (err, code, stdout, stderr) {
+    if (err) throw err
+    t.is(code, 0, 'prune finished successfully')
+    t.like(JSON.parse(stdout), {removed: [{name: 'a'}, {name: 'b'}]}, 'removed the right modules')
+    var dirs = readdir(testdir + '/node_modules').sort()
+    t.same(dirs, [])
+    t.end()
+  })
+})
+
+test('cleanup', function (t) {
+  cleanup()
+  t.end()
+})