feat: keep dev server alive during HMR updates

2026-07-13 15:17:49 +05:30
parent cf4c3723c5
commit 577c38a965
62 changed files with 281 additions and 169 deletions
@@ -0,0 +1,43 @@
+import { expect, test } from "bun:test";
+import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { invalidateModule, loadModule, setCompileCacheDir } from "../src/pipeline.ts";
+
+test("invalidateModule loads changed server modules without restarting the process", async () => {
+  const root = mkdtempSync(join(tmpdir(), "wrnexus-hmr-"));
+  const file = join(root, "page.ts");
+  setCompileCacheDir(join(root, ".wrnexus"));
+
+  try {
+    writeFileSync(file, "export const value = 1;\n");
+    expect((await loadModule(file)).value).toBe(1);
+
+    writeFileSync(file, "export const value = 2;\n");
+    expect((await loadModule(file)).value).toBe(1);
+
+    invalidateModule(file);
+    expect((await loadModule(file)).value).toBe(2);
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+test("invalidateModule recompiles changed WRN files in-process", async () => {
+  const root = mkdtempSync(join(tmpdir(), "wrnexus-hmr-"));
+  const file = join(root, "page.wrn");
+  setCompileCacheDir(join(root, ".wrnexus"));
+
+  try {
+    writeFileSync(file, "page Home { view { <h1>First</h1> } }\n");
+    const first = (await loadModule(file)).default as (ctx: unknown) => unknown;
+    expect(String(first({}))).toContain("First");
+
+    writeFileSync(file, "page Home { view { <h1>Second</h1> } }\n");
+    invalidateModule(file);
+    const second = (await loadModule(file)).default as (ctx: unknown) => unknown;
+    expect(String(second({}))).toContain("Second");
+  } finally {
+    rmSync(root, { recursive: true, force: true });
+  }
+});