Dashboard strategy generating the views (#175)

frontend/tests/render-strategy.mjs

@@ -0,0 +1,48 @@
+/**
+ * Import the built bundle into jsdom and generate the dashboard strategy's
+ * views.
+ *
+ * Usage: node render-strategy.mjs < spec.json
+ *
+ * The spec JSON carries {bundle, url, config, hass}; stdout receives one
+ * JSON object {views} — the strategy output's views array with the paths
+ * and card configs the generated dashboard renders.  The Python panel
+ * tests drive this harness so the assertions run against the exact bundle
+ * HACS ships.
+ */
+import { readFileSync } from "node:fs";
+import { pathToFileURL } from "node:url";
+import { JSDOM } from "jsdom";
+
+const spec = JSON.parse(readFileSync(0, "utf8"));
+
+const dom = new JSDOM("<!doctype html><html><body></body></html>", {
+  url: spec.url ?? "http://homeassistant.local/nestquest/party",
+  pretendToBeVisual: true,
+});
+
+// Expose the jsdom globals the Lit bundle expects. Node's own intrinsics
+// (Object, Array, ...) are kept — only what globalThis lacks is copied.
+for (const key of Object.getOwnPropertyNames(dom.window)) {
+  if (!(key in globalThis)) {
+    try {
+      globalThis[key] = dom.window[key];
+    } catch {
+      // jsdom getters may throw on access; the strategy does not need them.
+    }
+  }
+}
+globalThis.window = dom.window;
+
+await import(pathToFileURL(spec.bundle).href);
+
+const strategy = window.customStrategies?.["nestquest-party"];
+if (!strategy) {
+  console.error("nestquest-party strategy is not registered on the bundle");
+  process.exit(1);
+}
+
+const lovelace = await strategy.generate(spec.config, spec.hass);
+const payload = JSON.stringify({ views: lovelace.views });
+await new Promise((resolve) => process.stdout.write(payload, () => resolve()));
+process.exit(0);