From 3bc2838360627f78a91a7cad81f3bc97711410c2 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sun, 29 May 2022 14:50:55 -0500
Subject: refactor: move everything into src/ subdirectory

---
 src/modules/Util.test.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/modules/Util.test.js

(limited to 'src/modules/Util.test.js')

diff --git a/src/modules/Util.test.js b/src/modules/Util.test.js
new file mode 100644
index 0000000..000d54e
--- /dev/null
+++ b/src/modules/Util.test.js
@@ -0,0 +1,23 @@
+import { test, assert} from './test-assert.js';
+import { useAverage } from './Util.js';
+
+
+test('Average correctly accumulates an average', () => {
+	let [avg, avg_append] = useAverage();
+	let data = [];
+	for (let i=0; i<5000; i++) {
+		let d = Math.random();
+		data.push(d);
+		avg_append(d);
+	}
+
+	let manual_average = 0;
+	for (let d of data) manual_average += d;
+	manual_average /= data.length;
+
+	const precision = (decimalPlaces, num) => {
+		const theta = 10**decimalPlaces;
+		return Math.floor(num * theta) / theta;
+	};
+	assert.equal(precision(5, avg()), precision(5, manual_average));
+});
-- 
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