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/prefixed-logger.ts

@@ -0,0 +1,28 @@
+import { Logger } from "sync-client";
+
+export class PrefixedLogger extends Logger {
+    private readonly base: Logger;
+    private readonly prefix: string;
+
+    public constructor(base: Logger, prefix: string) {
+        super();
+        this.base = base;
+        this.prefix = prefix;
+    }
+
+    public override debug(message: string): void {
+        this.base.debug(`[${this.prefix}] ${message}`);
+    }
+
+    public override info(message: string): void {
+        this.base.info(`[${this.prefix}] ${message}`);
+    }
+
+    public override warn(message: string): void {
+        this.base.warn(`[${this.prefix}] ${message}`);
+    }
+
+    public override error(message: string): void {
+        this.base.error(`[${this.prefix}] ${message}`);
+    }
+}