chore: import upstream snapshot with attribution

testing/postgres-client-tests/node/database.js

@@ -0,0 +1,28 @@
+import pkg from "pg";
+const { Client } = pkg;
+
+export class Database {
+  constructor(config) {
+    this.client = new Client(config);
+    this.client.connect();
+  }
+
+  query(sql, args) {
+    return new Promise((resolve, reject) => {
+      this.client.query(sql, args, (err, rows) => {
+        if (err) return reject(err);
+        return resolve(rows);
+      });
+    });
+  }
+
+  close() {
+    this.client.end((err) => {
+      if (err) {
+        console.error(err);
+      } else {
+        console.log("db connection closed");
+      }
+    });
+  }
+}