test: add already-aborted-controller test for spawn()

PR-URL: #36644
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>

test/parallel/test-child-process-spawn-controller.js

@@ -5,18 +5,38 @@ const common = require('../common');
 const assert = require('assert');
 const cp = require('child_process');
 
-// Verify that passing an AbortSignal works
-const controller = new AbortController();
-const { signal } = controller;
+{
+  // Verify that passing an AbortSignal works
+  const controller = new AbortController();
+  const { signal } = controller;
 
-const echo = cp.spawn('echo', ['fun'], {
-  encoding: 'utf8',
-  shell: true,
-  signal
-});
+  const echo = cp.spawn('echo', ['fun'], {
+    encoding: 'utf8',
+    shell: true,
+    signal
+  });
 
-echo.on('error', common.mustCall((e) => {
-  assert.strictEqual(e.name, 'AbortError');
-}));
+  echo.on('error', common.mustCall((e) => {
+    assert.strictEqual(e.name, 'AbortError');
+  }));
 
-controller.abort();
+  controller.abort();
+}
+
+{
+  // Verify that passing an already-aborted signal works.
+  const controller = new AbortController();
+  const { signal } = controller;
+
+  controller.abort();
+
+  const echo = cp.spawn('echo', ['fun'], {
+    encoding: 'utf8',
+    shell: true,
+    signal
+  });
+
+  echo.on('error', common.mustCall((e) => {
+    assert.strictEqual(e.name, 'AbortError');
+  }));
+}