test: improve coverage of lib/events.js

PR-URL: https://github.com/nodejs/node/pull/38582
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/test/parallel/test-event-emitter-emit-context.js b/test/parallel/test-event-emitter-emit-context.js
new file mode 100644
index 0000000000..82e4b59518
--- /dev/null
+++ b/test/parallel/test-event-emitter-emit-context.js
@@ -0,0 +1,18 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const EventEmitter = require('events');
+
+// Test emit called by other context
+const EE = new EventEmitter();
+
+// Works as expected if the context has no `constructor.name`
+{
+  const ctx = Object.create(null);
+  assert.throws(
+    () => EE.emit.call(ctx, 'error', new Error('foo')),
+    common.expectsError({ name: 'Error', message: 'foo' })
+  );
+}
+
+assert.strictEqual(EE.emit.call({}, 'foo'), false);