Build: ship Matrix crypto WASM pkg

test/scripts/copy-matrix-crypto-wasm-pkg.test.ts

@@ -0,0 +1,45 @@
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+import { copyMatrixCryptoWasmPkg } from "../../scripts/copy-matrix-crypto-wasm-pkg.mjs";
+
+function createRepoFixture() {
+  return fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-matrix-wasm-pkg-"));
+}
+
+describe("copyMatrixCryptoWasmPkg", () => {
+  it("stages the matrix crypto wasm package into dist/pkg", () => {
+    const repoRoot = createRepoFixture();
+    const sourcePkgDir = path.join(
+      repoRoot,
+      "node_modules",
+      "@matrix-org",
+      "matrix-sdk-crypto-wasm",
+      "pkg",
+    );
+    fs.mkdirSync(sourcePkgDir, { recursive: true });
+    fs.writeFileSync(path.join(sourcePkgDir, "matrix_sdk_crypto_wasm_bg.wasm"), "wasm\n", "utf8");
+    fs.writeFileSync(path.join(sourcePkgDir, "matrix_sdk_crypto_wasm_bg.js"), "js\n", "utf8");
+
+    copyMatrixCryptoWasmPkg({ cwd: repoRoot });
+
+    expect(
+      fs.readFileSync(path.join(repoRoot, "dist", "pkg", "matrix_sdk_crypto_wasm_bg.wasm"), "utf8"),
+    ).toBe("wasm\n");
+    expect(
+      fs.readFileSync(path.join(repoRoot, "dist", "pkg", "matrix_sdk_crypto_wasm_bg.js"), "utf8"),
+    ).toBe("js\n");
+  });
+
+  it("removes stale dist/pkg output when the source package is unavailable", () => {
+    const repoRoot = createRepoFixture();
+    const staleTargetDir = path.join(repoRoot, "dist", "pkg");
+    fs.mkdirSync(staleTargetDir, { recursive: true });
+    fs.writeFileSync(path.join(staleTargetDir, "stale.txt"), "stale\n", "utf8");
+
+    copyMatrixCryptoWasmPkg({ cwd: repoRoot });
+
+    expect(fs.existsSync(staleTargetDir)).toBe(false);
+  });
+});