agent updates

test/measurement-container-core.test.js

@@ -0,0 +1,61 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const MeasurementContainer = require('../src/measurements/MeasurementContainer.js');
+
+function makeContainer() {
+  return new MeasurementContainer({
+    windowSize: 10,
+    defaultUnits: {
+      flow: 'm3/h',
+      pressure: 'mbar',
+    },
+  });
+}
+
+test('stores and retrieves measurements via chain API', () => {
+  const c = makeContainer();
+  c.type('flow').variant('measured').position('upstream').value(100, 1, 'm3/h');
+
+  assert.equal(c.type('flow').variant('measured').position('upstream').getCurrentValue(), 100);
+  assert.equal(c.type('flow').variant('measured').position('upstream').exists(), true);
+});
+
+test('distance(null) auto-derives from position mapping', () => {
+  const c = makeContainer();
+  c.type('pressure').variant('measured').position('upstream').distance(null).value(5, 1, 'mbar');
+
+  const m = c.type('pressure').variant('measured').position('upstream').get();
+  assert.equal(m.distance, Number.POSITIVE_INFINITY);
+});
+
+test('getLaggedSample with requested unit converts sample value', () => {
+  const c = makeContainer();
+  c.type('flow').variant('measured').position('upstream').value(3.6, 1, 'm3/h');
+  c.type('flow').variant('measured').position('upstream').value(7.2, 2, 'm3/h');
+
+  const previous = c.type('flow').variant('measured').position('upstream').getLaggedSample(1, 'm3/s');
+  assert.ok(previous);
+  assert.equal(previous.unit, 'm3/s');
+  assert.ok(Math.abs(previous.value - 0.001) < 1e-8);
+});
+
+test('difference computes current and average delta between positions', () => {
+  const c = makeContainer();
+  c.type('pressure').variant('measured').position('downstream').value(120, 1, 'mbar');
+  c.type('pressure').variant('measured').position('downstream').value(130, 2, 'mbar');
+  c.type('pressure').variant('measured').position('upstream').value(100, 1, 'mbar');
+  c.type('pressure').variant('measured').position('upstream').value(110, 2, 'mbar');
+
+  const diff = c.type('pressure').variant('measured').difference();
+  assert.equal(diff.value, 20);
+  assert.equal(diff.avgDiff, 20);
+  assert.equal(diff.unit, 'mbar');
+});
+
+test('_convertPositionNum2Str maps signs to labels', () => {
+  const c = makeContainer();
+  assert.equal(c._convertPositionNum2Str(0), 'atEquipment');
+  assert.equal(c._convertPositionNum2Str(1), 'downstream');
+  assert.equal(c._convertPositionNum2Str(-1), 'upstream');
+});