agent updates

test/nrmse.test.js

@@ -0,0 +1,37 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const ErrorMetrics = require('../src/nrmse/errorMetrics.js');
+const { makeLogger } = require('./helpers.js');
+
+test('MSE and RMSE calculations are correct', () => {
+  const m = new ErrorMetrics({}, makeLogger());
+  const predicted = [1, 2, 3];
+  const measured = [1, 3, 5];
+
+  assert.ok(Math.abs(m.meanSquaredError(predicted, measured) - 5 / 3) < 1e-9);
+  assert.ok(Math.abs(m.rootMeanSquaredError(predicted, measured) - Math.sqrt(5 / 3)) < 1e-9);
+});
+
+test('normalizeUsingRealtime throws when range is zero', () => {
+  const m = new ErrorMetrics({}, makeLogger());
+  assert.throws(() => m.normalizeUsingRealtime([1, 1, 1], [1, 1, 1]), /Invalid process range/);
+});
+
+test('longTermNRMSD returns 0 before 100 samples and value after', () => {
+  const m = new ErrorMetrics({}, makeLogger());
+  for (let i = 0; i < 99; i++) {
+    assert.equal(m.longTermNRMSD(0.1), 0);
+  }
+  assert.notEqual(m.longTermNRMSD(0.2), 0);
+});
+
+test('assessDrift returns expected result envelope', () => {
+  const m = new ErrorMetrics({}, makeLogger());
+  const out = m.assessDrift([100, 101, 102], [99, 100, 103], 90, 110);
+
+  assert.equal(typeof out.nrmse, 'number');
+  assert.equal(typeof out.longTermNRMSD, 'number');
+  assert.ok('immediateLevel' in out);
+  assert.ok('longTermLevel' in out);
+});