updates to rotating machine struct

test/edge/error-paths.edge.test.js

@@ -0,0 +1,31 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const Machine = require('../../src/specificClass');
+const NodeClass = require('../../src/nodeClass');
+const { makeMachineConfig, makeStateConfig, makeNodeStub } = require('../helpers/factories');
+
+test('setpoint rejects negative inputs without throwing', async () => {
+  const machine = new Machine(makeMachineConfig(), makeStateConfig({ state: { current: 'operational' } }));
+  await assert.doesNotReject(async () => {
+    await machine.setpoint(-1);
+  });
+});
+
+test('nodeClass _updateNodeStatus returns error status on internal failure', () => {
+  const inst = Object.create(NodeClass.prototype);
+  const node = makeNodeStub();
+  inst.node = node;
+  inst.source = {
+    currentMode: 'auto',
+    state: {
+      getCurrentState() {
+        throw new Error('boom');
+      },
+    },
+  };
+
+  const status = inst._updateNodeStatus();
+  assert.equal(status.text, 'Status Error');
+  assert.equal(node._errors.length, 1);
+});