fix: 优化端口检查逻辑，增强对不同平台的支持

Author: wan

src/utils/get_test_port.js

@@ -1,35 +1,85 @@
-const net = require('net');
+const net = require('net');
+const { execFile } = require('child_process');
+let nextUniappTestPort = 9520;
 
 /**
  * @description 检查端口是否被使用
  * @param {Number} port
- */
-function isPortInUse(port) {
-    return new Promise((resolve) => {
-        const server = net.createServer().once('error', () => {
-            resolve(true);
-        }).once('listening', () => {
-            server.close(() => {
-                resolve(false);
-            });
-        }).listen(port, '127.0.0.1');
-    });
+ */
+function isPortInUse(port) {
+    return new Promise((resolve) => {
+        if (process.platform == 'win32') {
+            isPortInUseWithNetstat(port).then(resolve);
+            return;
+        };
+        execFile('lsof', ['-nP', '-iTCP:' + port, '-sTCP:LISTEN'], (error, stdout) => {
+            if (!error) {
+                resolve(stdout.trim() != '');
+                return;
+            };
+            if (error.code === 1) {
+                resolve(false);
+                return;
+            };
+            isPortInUseWithServer(port).then(resolve);
+        });
+    });
+};
+
+function isPortInUseWithNetstat(port) {
+    return new Promise((resolve) => {
+        execFile('netstat', ['-ano', '-p', 'tcp'], (error, stdout) => {
+            if (error) {
+                isPortInUseWithServer(port).then(resolve);
+                return;
+            };
+            const lines = stdout.split(/\r?\n/);
+            const portRegExp = new RegExp('(^|[^0-9])' + port + '([^0-9]|$)');
+            const portInUse = lines.some(line => {
+                const columns = line.trim().split(/\s+/);
+                if (columns.length < 4 || columns[0] != 'TCP') {
+                    return false;
+                };
+                return columns[3] == 'LISTENING' && portRegExp.test(columns[1]);
+            });
+            resolve(portInUse);
+        });
+    });
+};
+
+function isPortInUseWithServer(port) {
+    return new Promise((resolve) => {
+        const server = net.createServer().once('error', () => {
+            resolve(true);
+        }).once('listening', () => {
+            server.close(() => {
+                resolve(false);
+            });
+        }).listen(port);
+    });
 };
 
 /**
  * @description 获取一个uni-app自动化测试可用的端口
- */
-async function findAvailableUniappTestPort() {
-    let port = 9520;
-    let portInUse = true;
-    while (portInUse) {
-        portInUse = await isPortInUse(port);
-        if (portInUse) {
-            port++;
-        }
+ */
+async function findAvailableUniappTestPort() {
+    let port = nextUniappTestPort;
+    let portInUse = true;
+    while (portInUse) {
+        portInUse = await isPortInUse(port);
+        if (portInUse) {
+            port++;
+        }
     };
-    console.log("[自动化测试端口] is: ", port);
-    return port;
+    nextUniappTestPort = port + 1;
+    console.log("[自动化测试端口] is: ", port);
+    return port;
 };
 
-module.exports = findAvailableUniappTestPort;
+module.exports = findAvailableUniappTestPort;
+
+// if (require.main === module) {
+//     findAvailableUniappTestPort().then(port => {
+//         console.log("Available port:", port);
+//     });
+// };