Added a few utility methods to work with zip

(In test environment)

tests/utils/zip-utils.ts

@@ -0,0 +1,31 @@
+import { basename, resolve as resolvePath } from "node:path";
+import { ZipFile } from "yazl";
+
+export async function zipFile(path: string | string[], zipPath?: string): Promise<Buffer> {
+    const realPath = typeof path === "string" ? path : resolvePath(...path);
+    zipPath ||= basename(realPath);
+
+    const zip = new ZipFile();
+    zip.addFile(realPath, zipPath);
+    zip.end();
+
+    const chunks = [] as Buffer[];
+    for await (const chunk of zip.outputStream) {
+        chunks.push(Buffer.from(chunk));
+    }
+
+    return Buffer.concat(chunks);
+}
+
+export async function zipContent(content: string | Buffer, zipPath: string): Promise<Buffer> {
+    const zip = new ZipFile();
+    zip.addBuffer(Buffer.from(content), zipPath);
+    zip.end();
+
+    const chunks = [] as Buffer[];
+    for await (const chunk of zip.outputStream) {
+        chunks.push(Buffer.from(chunk));
+    }
+
+    return Buffer.concat(chunks);
+}