fix particle analysis table units and load image missing channels

frontend/tests/loadNodeOutputs.test.mjs

@@ -0,0 +1,40 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import {
+  beginTrackedNodeRequest,
+  isTrackedNodeRequestCurrent,
+  resolveLoadNodeChannelPath,
+} from '../src/loadNodeOutputs.js';
+
+test('resolveLoadNodeChannelPath can resolve a new ImageDemo node from its explicit selection before mount', () => {
+  const resolvedPath = resolveLoadNodeChannelPath({
+    explicitPath: 'APL_Figure4.ibw',
+    className: '',
+    widgetValues: {},
+  });
+
+  assert.equal(resolvedPath, 'APL_Figure4.ibw');
+});
+
+test('resolveLoadNodeChannelPath falls back to the current widget value for load nodes', () => {
+  assert.equal(resolveLoadNodeChannelPath({
+    className: 'Image',
+    widgetValues: { filename: 'scan.ibw' },
+  }), 'scan.ibw');
+
+  assert.equal(resolveLoadNodeChannelPath({
+    className: 'ImageDemo',
+    widgetValues: { name: 'demo.ibw' },
+  }), 'demo.ibw');
+});
+
+test('tracked load-node requests ignore stale async responses', () => {
+  const requestVersions = new Map();
+
+  const first = beginTrackedNodeRequest(requestVersions, '42');
+  const second = beginTrackedNodeRequest(requestVersions, '42');
+
+  assert.equal(isTrackedNodeRequestCurrent(requestVersions, '42', first), false);
+  assert.equal(isTrackedNodeRequestCurrent(requestVersions, '42', second), true);
+});