feat(csv-issues-esm): issue 441

demo/issues-esm/lib/441.js

@@ -0,0 +1,19 @@
+import assert from "node:assert";
+import { Database } from "duckdb-async";
+import { stringify } from "csv-stringify/sync";
+
+const db = await Database.create(":memory:");
+const t = await db.all("SELECT DATE '2022-01-01' as dt");
+
+// Validate that duckdb returns as an instance of JS date
+assert(t[0].dt instanceof Date);
+// Validate that date objects are handled by `cast.date`
+assert.equal(stringify(t, { cast: { date: () => "ok" } }).trim(), "ok");
+
+// First assertion raised in the issue
+assert.equal(stringify(t), 1640995200000);
+// Second assertion raised in the issue
+assert.equal(
+  stringify(t, { cast: { date: (x) => x.getTime().toString() } }).trim(),
+  1640995200000,
+);

demo/issues-esm/package.json

@@ -37,6 +37,7 @@
     "csv-parse": "^5.5.6",
     "csv-stringify": "^6.5.1",
     "dedent": "^1.5.3",
-    "desm": "^1.3.1"
+    "desm": "^1.3.1",
+    "duckdb-async": "^1.1.1"
   }
 }