Cache markdown and append realtime messages

tests/android-markdown-cache.test.ts

@@ -0,0 +1,31 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
+
+test("BossMarkdown caches rendered markdown spans for repeated bodies", async () => {
+  const source = await readFile(
+    new URL("../android/app/src/main/java/com/hyzq/boss/BossMarkdown.java", import.meta.url),
+    "utf8",
+  );
+
+  assert.match(
+    source,
+    /private static final LruCache<String, CharSequence> RENDER_CACHE = new LruCache<>\(/,
+    "expected markdown renderer to keep an LRU cache for rendered spans",
+  );
+  assert.match(
+    source,
+    /String cacheKey = buildCacheKey\(context, markdown, outgoing\);/,
+    "expected markdown renderer to derive a stable cache key before parsing",
+  );
+  assert.match(
+    source,
+    /CharSequence cached = RENDER_CACHE\.get\(cacheKey\);/,
+    "expected markdown renderer to reuse cached spans when available",
+  );
+  assert.match(
+    source,
+    /RENDER_CACHE\.put\(cacheKey, rendered\);/,
+    "expected markdown renderer to save rendered spans into the cache",
+  );
+});