fix(builder): deterministic ids for NumberCounter + form-relay marker

Two components of the det-id bug class were missed in the earlier migration: NumberCounter's wrapper/counter ids and count-up script, and the shared form-relay-wiring fid (used by ContactForm/FormContainer). Both used Math.random() for exported HTML ids, breaking caching/diffing across exports. Migrate both to scopeId(nodeId, fallbackSeed, prefix), threading nodeId through NumberCounter.toHtml and relayFormWiring (via ContactForm.toHtml and FormContainer.toHtml, both now passing nodeId as their 3rd arg).
2026-07-12 14:43:31 -07:00
parent 177eda93d0
commit a036843728
8 changed files with 149 additions and 15 deletions
@@ -0,0 +1,49 @@
+import { describe, test, expect } from 'vitest';
+import { NumberCounter } from './NumberCounter';
+
+const toHtml = (NumberCounter as any).toHtml;
+
+const counters = [
+  { number: 150, suffix: '+', label: 'Projects' },
+  { number: 50, suffix: '+', label: 'Clients' },
+];
+
+describe('NumberCounter.toHtml deterministic + unique scope ids (thread node id, no Math.random)', () => {
+  test('same node id -> identical output across calls (deterministic)', () => {
+    const { html: html1 } = toHtml({ counters }, '', 'node-nc1');
+    const { html: html2 } = toHtml({ counters }, '', 'node-nc1');
+    expect(html1).toBe(html2);
+  });
+
+  test('different node ids -> distinct, non-colliding nc_ scopes (identical props, no collision)', () => {
+    const { html: html1 } = toHtml({ counters }, '', 'node-nc1');
+    const { html: html2 } = toHtml({ counters }, '', 'node-nc2');
+    const wrapId1 = html1.match(/<div id="(nc_[^"]+)"/)![1];
+    const wrapId2 = html2.match(/<div id="(nc_[^"]+)"/)![1];
+    expect(wrapId1).not.toBe(wrapId2);
+  });
+
+  test('wrapper id, per-counter ids, and inline script agree on the same uid', () => {
+    const { html } = toHtml({ counters }, '', 'node-nc1');
+    const wrapId = html.match(/<div id="(nc_[^"]+)"/)![1];
+    expect(html).toContain(`id="${wrapId}_n0"`);
+    expect(html).toContain(`id="${wrapId}_n1"`);
+    expect(html).toContain(`var uid="${wrapId}"`);
+    expect(html).toContain('document.getElementById(uid)');
+    expect(html).toContain('document.getElementById(uid+"_n"+i)');
+  });
+
+  test('no nodeId (legacy 2-arg call): still deterministic across repeated calls, not random', () => {
+    const { html: html1 } = toHtml({ counters }, '');
+    const { html: html2 } = toHtml({ counters }, '');
+    expect(html1).toBe(html2);
+  });
+
+  test('two different node ids never collide even with default (no counters override) props', () => {
+    const { html: html1 } = toHtml({}, '', 'node-a');
+    const { html: html2 } = toHtml({}, '', 'node-b');
+    const wrapId1 = html1.match(/<div id="(nc_[^"]+)"/)![1];
+    const wrapId2 = html2.match(/<div id="(nc_[^"]+)"/)![1];
+    expect(wrapId1).not.toBe(wrapId2);
+  });
+});