common.mustCall used

Author: amyssnippet

test/parallel/test-net-socket-tos.js

@@ -5,53 +5,68 @@ const net = require('net');
 
 const isWindows = common.isWindows;
 
-const server = net.createServer(common.mustCall((socket) => {
-  socket.end();
-}));
-
-server.listen(0, common.mustCall(() => {
-  const port = server.address().port;
-  const client = net.connect(port);
-
-  client.on('connect', common.mustCall(() => {
-    // TEST 1: setTOS validation
-    // Should throw if value is not a number or out of range
-    assert.throws(() => client.setTOS('invalid'), {
-      code: 'ERR_INVALID_ARG_TYPE'
-    });
-    assert.throws(() => client.setTOS(NaN), {
-      code: 'ERR_INVALID_ARG_TYPE'
-    });
-    assert.throws(() => client.setTOS(256), {
-      code: 'ERR_OUT_OF_RANGE'
-    });
-    assert.throws(() => client.setTOS(-1), {
-      code: 'ERR_OUT_OF_RANGE'
-    });
-
-    // TEST 2: setting and getting TOS
-    const tosValue = 0x10; // IPTOS_LOWDELAY (16)
-
-    if (isWindows) {
-      // On Windows, your implementation returns UV_ENOSYS, which throws in JS
-      assert.throws(() => client.setTOS(tosValue), {
-        code: 'ENOSYS'
-      });
-    } else {
-      // On POSIX (Linux/macOS), this should succeed
-      client.setTOS(tosValue);
-
-      // Verify values
-      // Note: Some OSs might mask the value (e.g. Linux sometimes masks ECN bits),
-      // but usually 0x10 should return 0x10.
-      const got = client.getTOS();
-      assert.strictEqual(got, tosValue, `Expected TOS ${tosValue}, got ${got}`);
-    }
-
-    client.end();
-  }));
-
-  client.on('end', () => {
-    server.close();
-  });
-}));
+const server = net.createServer(
+  common.mustCall((socket) => {
+    socket.end();
+  }),
+);
+
+server.listen(
+  0,
+  common.mustCall(() => {
+    const port = server.address().port;
+    const client = net.connect(port);
+
+    client.on(
+      'connect',
+      common.mustCall(() => {
+        // TEST 1: setTOS validation
+        // Should throw if value is not a number or out of range
+        assert.throws(() => client.setTOS('invalid'), {
+          code: 'ERR_INVALID_ARG_TYPE',
+        });
+        assert.throws(() => client.setTOS(NaN), {
+          code: 'ERR_INVALID_ARG_TYPE',
+        });
+        assert.throws(() => client.setTOS(256), {
+          code: 'ERR_OUT_OF_RANGE',
+        });
+        assert.throws(() => client.setTOS(-1), {
+          code: 'ERR_OUT_OF_RANGE',
+        });
+
+        // TEST 2: setting and getting TOS
+        const tosValue = 0x10; // IPTOS_LOWDELAY (16)
+
+        if (isWindows) {
+          // On Windows, your implementation returns UV_ENOSYS, which throws in JS
+          assert.throws(() => client.setTOS(tosValue), {
+            code: 'ENOSYS',
+          });
+        } else {
+          // On POSIX (Linux/macOS), this should succeed
+          client.setTOS(tosValue);
+
+          // Verify values
+          // Note: Some OSs might mask the value (e.g. Linux sometimes masks ECN bits),
+          // but usually 0x10 should return 0x10.
+          const got = client.getTOS();
+          assert.strictEqual(
+            got,
+            tosValue,
+            `Expected TOS ${tosValue}, got ${got}`,
+          );
+        }
+
+        client.end();
+      }),
+    );
+
+    client.on(
+      'end',
+      common.mustCall(() => {
+        server.close();
+      }),
+    );
+  }),
+);