Chat: Team-API und Laden des Chat-Bausteins vom Kundenportal

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/unit/loadChatComposer.test.mjs

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+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { loadModule } from './load.mjs'
+
+// Chat-Baustein (chat-composer.js/.css) wird zur Laufzeit vom Kundenportal geladen: eine Quelle fuer Portal und WOMS
+const { loadChatComposer } = await loadModule('src/lib/loadChatComposer.js')
+
+function fakeDoc() {
+  const appended = []
+  return {
+    appended,
+    head: { appendChild: (node) => { appended.push(node); return node } },
+    createElement: (tag) => ({ tag, attrs: {}, setAttribute(k, v) { this.attrs[k] = v } }),
+  }
+}
+
+test('haengt CSS und Skript einmal an und liefert window.ChatComposer', async () => {
+  const doc = fakeDoc()
+  const win = {}
+  const first = loadChatComposer({ baseUrl: 'https://project.webklar.com', doc, win })
+  const second = loadChatComposer({ baseUrl: 'https://project.webklar.com', doc, win })
+  assert.equal(doc.appended.length, 2)
+  const link = doc.appended.find((n) => n.tag === 'link')
+  const script = doc.appended.find((n) => n.tag === 'script')
+  assert.equal(link.href || link.attrs.href, 'https://project.webklar.com/chat-composer.css')
+  assert.equal(link.rel || link.attrs.rel, 'stylesheet')
+  assert.equal(script.src || script.attrs.src, 'https://project.webklar.com/chat-composer.js')
+  win.ChatComposer = { create() {} }
+  script.onload()
+  assert.equal(await first, win.ChatComposer)
+  assert.equal(await second, win.ChatComposer)
+})
+
+test('Skript laedt nicht -> deutsche Meldung, naechster Aufruf versucht es neu', async () => {
+  const doc = fakeDoc()
+  const win = {}
+  const p = loadChatComposer({ baseUrl: 'https://p', doc, win })
+  doc.appended.find((n) => n.tag === 'script').onerror()
+  await assert.rejects(p, { message: 'Der Chat-Baustein konnte nicht geladen werden.' })
+  loadChatComposer({ baseUrl: 'https://p', doc, win })
+  assert.equal(doc.appended.filter((n) => n.tag === 'script').length, 2)
+})
+
+test('schon geladen (win.ChatComposer vorhanden) -> nichts anhaengen', async () => {
+  const doc = fakeDoc()
+  const win = { ChatComposer: { create() {} } }
+  assert.equal(await loadChatComposer({ baseUrl: 'https://p', doc, win }), win.ChatComposer)
+  assert.equal(doc.appended.length, 0)
+})