Resolve issue #845

This issue resolves issue #845 by updating `@ldapjs/messages` to the
latest version and adding a test that shows how the module should be
used to evaluate search request scopes.

package.json

@@ -17,7 +17,7 @@
     "@ldapjs/controls": "2.0.0",
     "@ldapjs/dn": "1.0.0",
     "@ldapjs/filter": "2.0.0",
-    "@ldapjs/messages": "1.0.0",
+    "@ldapjs/messages": "1.0.1",
     "@ldapjs/protocol": "^1.2.1",
     "abstract-logging": "^2.0.1",
     "assert-plus": "^1.0.0",

test/issue-845.test.js

@@ -0,0 +1,116 @@
+'use strict'
+
+const tap = require('tap')
+const { SearchResultEntry, SearchRequest } = require('@ldapjs/messages')
+const ldapjs = require('../')
+
+const server = ldapjs.createServer()
+
+const SUFFIX = ''
+const directory = {
+  'dc=example,dc=com': {
+    objectclass: 'example',
+    dc: 'example',
+    cn: 'example'
+  }
+}
+
+server.bind(SUFFIX, (req, res, done) => {
+  res.end()
+  return done()
+})
+
+server.search(SUFFIX, (req, res, done) => {
+  const dn = req.dn.toString().toLowerCase()
+
+  if (Object.hasOwn(directory, dn) === false) {
+    return done(Error('not in directory'))
+  }
+
+  switch (req.scope) {
+    case SearchRequest.SCOPE_BASE:
+    case SearchRequest.SCOPE_SUBTREE: {
+      res.send(new SearchResultEntry({ objectName: `dc=${req.scopeName}` }))
+      break
+    }
+  }
+
+  res.end()
+  done()
+})
+
+tap.beforeEach(t => {
+  return new Promise((resolve, reject) => {
+    server.listen(0, '127.0.0.1', (err) => {
+      if (err) return reject(err)
+      t.context.url = server.url
+
+      t.context.client = ldapjs.createClient({ url: [server.url] })
+      t.context.searchOpts = {
+        filter: '(&(objectClass=*))',
+        scope: 'sub',
+        attributes: ['dn', 'cn']
+      }
+
+      resolve()
+    })
+  })
+})
+
+tap.afterEach(t => {
+  return new Promise((resolve, reject) => {
+    t.context.client.destroy()
+    server.close((err) => {
+      if (err) return reject(err)
+      resolve()
+    })
+  })
+})
+
+tap.test('rejects if search not in directory', t => {
+  const { client, searchOpts } = t.context
+
+  client.search('dc=nope', searchOpts, (err, res) => {
+    t.error(err)
+    res.on('error', err => {
+      // TODO: plain error messages should not be lost
+      // This should be fixed in a revamp of the server code.
+      // ~ jsumners 2023-03-08
+      t.equal(err.lde_message, 'Operations Error')
+      t.end()
+    })
+  })
+})
+
+tap.test('base scope matches', t => {
+  const { client, searchOpts } = t.context
+  searchOpts.scope = 'base'
+
+  client.search('dc=example,dc=com', searchOpts, (err, res) => {
+    t.error(err)
+    res.on('error', (err) => {
+      t.error(err)
+      t.end()
+    })
+    res.on('searchEntry', entry => {
+      t.equal(entry.objectName.toString(), 'dc=base')
+      t.end()
+    })
+  })
+})
+
+tap.test('sub scope matches', t => {
+  const { client, searchOpts } = t.context
+
+  client.search('dc=example,dc=com', searchOpts, (err, res) => {
+    t.error(err)
+    res.on('error', (err) => {
+      t.error(err)
+      t.end()
+    })
+    res.on('searchEntry', entry => {
+      t.equal(entry.objectName.toString(), 'dc=subtree')
+      t.end()
+    })
+  })
+})