test(planner): characterize plot fallback and handoff order

tests/ena-planner-plots.mjs

@@ -0,0 +1,78 @@
+import assert from 'node:assert/strict';
+
+import {
+  applyPlannerResultAndSend,
+  extractLastNPlots,
+  formatPlotsBlock,
+} from '../ena-planner/ena-planner-runtime-utils.js';
+
+{
+  const chat = [
+    { mes: 'no plot here' },
+    { mes: '<plot>old one</plot>\n<plot>old two</plot>' },
+    { mes: 'assistant says <plot>new one</plot>' },
+  ];
+  assert.deepEqual(extractLastNPlots(chat, 2), [
+    '<plot>new one</plot>',
+    '<plot>old two</plot>',
+  ]);
+  assert.deepEqual(extractLastNPlots(chat, 0), []);
+  assert.deepEqual(extractLastNPlots(null, 3), []);
+}
+
+{
+  const block = formatPlotsBlock([
+    '<plot>newest</plot>',
+    '<plot>older</plot>',
+  ]);
+  assert.equal(
+    block,
+    '<previous_plots>\n【plot -2】\n<plot>older</plot>\n\n【plot -1】\n<plot>newest</plot>\n</previous_plots>',
+  );
+  assert.equal(formatPlotsBlock([]), '');
+}
+
+{
+  const order = [];
+  const textarea = { value: 'raw' };
+  const button = { click: () => order.push('click') };
+  const plannerState = { bypassNextSend: false, lastInjectedText: '' };
+  const plannerRecall = { result: { selected: ['memory-a'] } };
+  const runtime = {
+    preparePlannerRecallHandoff(payload) {
+      order.push('handoff');
+      assert.equal(payload.rawUserInput, 'raw input');
+      assert.equal(payload.plannerAugmentedMessage, 'raw input\n\n<plot>next</plot>');
+      assert.equal(payload.plannerRecall, plannerRecall);
+    },
+  };
+
+  const result = applyPlannerResultAndSend({
+    textarea,
+    button,
+    rawUserInput: 'raw input',
+    filtered: '<plot>next</plot>',
+    plannerRecall,
+    runtime,
+    plannerState,
+  });
+
+  assert.deepEqual(order, ['handoff', 'click']);
+  assert.equal(result.applied, true);
+  assert.equal(result.handoffPrepared, true);
+  assert.equal(textarea.value, 'raw input\n\n<plot>next</plot>');
+  assert.equal(plannerState.lastInjectedText, textarea.value);
+  assert.equal(plannerState.bypassNextSend, true);
+}
+
+{
+  const order = [];
+  const result = applyPlannerResultAndSend({
+    textarea: null,
+    button: { click: () => order.push('click') },
+  });
+  assert.deepEqual(result, { applied: false, reason: 'missing-target' });
+  assert.deepEqual(order, []);
+}
+
+console.log('ena-planner-plots tests passed');