test: refactor beforeExit tests

Combine and rename tests for the `beforeExit` event on `process`.

The naming now more closely follows the de facto conventions of the
project.

The two tests were very similar and do not seem to benefit from being
separate.

PR-URL: https://github.com/nodejs/node/pull/10581
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/test/parallel/test-process-beforeexit.js b/test/parallel/test-process-beforeexit.js
new file mode 100644
index 0000000000..4557628c42
--- /dev/null
+++ b/test/parallel/test-process-beforeexit.js
@@ -0,0 +1,39 @@
+'use strict';
+const common = require('../common');
+const net = require('net');
+
+process.once('beforeExit', common.mustCall(tryImmediate));
+
+function tryImmediate() {
+  setImmediate(common.mustCall(() => {
+    process.once('beforeExit', common.mustCall(tryTimer));
+  }));
+}
+
+function tryTimer() {
+  setTimeout(common.mustCall(() => {
+    process.once('beforeExit', common.mustCall(tryListen));
+  }), 1);
+}
+
+function tryListen() {
+  net.createServer()
+    .listen(0)
+    .on('listening', common.mustCall(function() {
+      this.close();
+      process.once('beforeExit', common.mustCall(tryRepeatedTimer));
+    }));
+}
+
+// test that a function invoked from the beforeExit handler can use a timer
+// to keep the event loop open, which can use another timer to keep the event
+// loop open, etc.
+function tryRepeatedTimer() {
+  const N = 5;
+  let n = 0;
+  const repeatedTimer = common.mustCall(function() {
+    if (++n < N)
+      setTimeout(repeatedTimer, 1);
+  }, N);
+  setTimeout(repeatedTimer, 1);
+}