From c1592fcb95741b1475b3708ad4b8de91cf836d96 Mon Sep 17 00:00:00 2001
From: Cadence Ember <cadence@disroot.org>
Date: Thu, 13 Mar 2025 09:53:41 +1300
Subject: [PATCH] Add test case for error stringifier

---
 src/m2d/event-dispatcher.test.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/m2d/event-dispatcher.test.js

diff --git a/src/m2d/event-dispatcher.test.js b/src/m2d/event-dispatcher.test.js
new file mode 100644
index 0000000..de754da
--- /dev/null
+++ b/src/m2d/event-dispatcher.test.js
@@ -0,0 +1,23 @@
+// @ts-check
+
+const {test} = require("supertape")
+const {stringifyErrorStack} = require("./event-dispatcher")
+
+test("stringify error stack: works", t => {
+	function a() {
+		const e = new Error("message", {cause: new Error("inner")})
+		// @ts-ignore
+		e.prop = 2.1
+		throw e
+	}
+	try {
+		a()
+		t.fail("shouldn't get here")
+	} catch (e) {
+		const str = stringifyErrorStack(e)
+		t.match(str, /^Error: message$/m)
+		t.match(str, /^    at a \(.*event-dispatcher\.test\.js/m)
+		t.match(str, /^  \[cause\]: Error: inner$/m)
+		t.match(str, /^  \[prop\]: 2.1$/m)
+	}
+})