Add deterministic-tests (#190)

Reviewed-on: https://home.schmelczer.dev/git/git/andras/vault-link/pulls/190
Co-authored-by: Andras Schmelczer <andras@schmelczer.dev>
Co-committed-by: Andras Schmelczer <andras@schmelczer.dev>

frontend/deterministic-tests/src/utils/with-timeout.ts

@@ -0,0 +1,15 @@
+export async function withTimeout<T>(
+    promise: Promise<T>,
+    timeoutMs: number,
+    message: string
+): Promise<T> {
+    let timeoutId: ReturnType<typeof setTimeout> | undefined = undefined;
+    const timeoutPromise = new Promise<never>((_resolve, reject) => {
+        timeoutId = setTimeout(() => {
+            reject(new Error(message));
+        }, timeoutMs);
+    });
+    return Promise.race([promise, timeoutPromise]).finally(() => {
+        clearTimeout(timeoutId);
+    });
+}