selenium

node_modules/selenium-webdriver/net/portprober.js

@@ -0,0 +1,76 @@
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+'use strict'
+
+const net = require('net')
+
+/**
+ * Tests if a port is free.
+ * @param {number} port The port to test.
+ * @param {string=} opt_host The bound host to test the {@code port} against.
+ *     Defaults to {@code INADDR_ANY}.
+ * @return {!Promise<boolean>} A promise that will resolve with whether the port
+ *     is free.
+ */
+function isFree(port, opt_host) {
+  return new Promise((resolve, reject) => {
+    const server = net.createServer().on('error', function (e) {
+      if (e.code === 'EADDRINUSE' || e.code === 'EACCES') {
+        resolve(false)
+      } else {
+        reject(e)
+      }
+    })
+
+    server.listen(port, opt_host, function () {
+      server.close(() => resolve(true))
+    })
+  })
+}
+
+/**
+ * @param {string=} opt_host The bound host to test the {@code port} against.
+ *     Defaults to {@code INADDR_ANY}.
+ * @return {!Promise<number>} A promise that will resolve to a free port. If a
+ *     port cannot be found, the promise will be rejected.
+ */
+
+function findFreePort(opt_host) {
+  return new Promise((resolve, reject) => {
+    const server = net.createServer()
+    server.on('listening', function () {
+      resolve(server.address().port)
+      server.close()
+    })
+    server.on('error', (e) => {
+      if (e.code === 'EADDRINUSE' || e.code === 'EACCES') {
+        resolve('Unable to find a free port')
+      } else {
+        reject(e)
+      }
+    })
+    // By providing 0 we let the operative system find an arbitrary port
+    server.listen(0, opt_host)
+  })
+}
+
+// PUBLIC API
+module.exports = {
+  findFreePort,
+  isFree,
+}