test-child-process-send-after-close.js

src/bun.js/api/bun/subprocess.zig

@@ -721,7 +721,7 @@ pub const Subprocess = struct {
         IPClog("Subprocess#doSend", .{});
         const ipc_data = &(this.ipc_data orelse {
             if (this.hasExited()) {
-                return global.throw("Subprocess.send() cannot be used after the process has exited.", .{});
+                return global.ERR_IPC_CHANNEL_CLOSED("Subprocess.send() cannot be used after the process has exited.", .{}).throw();
             } else {
                 return global.throw("Subprocess.send() can only be used if an IPC channel is open.", .{});
             }

test/js/node/test/parallel/test-child-process-send-after-close.js

@@ -0,0 +1,31 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const cp = require('child_process');
+const fixtures = require('../common/fixtures');
+
+const fixture = fixtures.path('empty.js');
+const child = cp.fork(fixture);
+
+child.on('close', common.mustCall((code, signal) => {
+  assert.strictEqual(code, 0);
+  assert.strictEqual(signal, null);
+
+  const testError = common.expectsError({
+    name: 'Error',
+    // message: 'Channel closed',
+    code: 'ERR_IPC_CHANNEL_CLOSED'
+  }, 2);
+
+  child.on('error', testError);
+
+  {
+    const result = child.send('ping');
+    assert.strictEqual(result, false);
+  }
+
+  {
+    const result = child.send('pong', testError);
+    assert.strictEqual(result, false);
+  }
+}));