Issue 1467: Add test that this works in regular duckdb-wasm

packages/duckdb-wasm/test/regression/github_1467.test.ts

@@ -0,0 +1,30 @@
+import * as duckdb from '../../src';
+
+// https://github.com/duckdb/duckdb-wasm/issues/477
+// Note that when ArrowJS supports negative decimals, castDecimalToDouble should probably be deprecated.
+export function test1467(db: () => duckdb.AsyncDuckDB): void {
+    let conn: duckdb.AsyncDuckDBConnection | null = null;
+    beforeEach(async () => {
+        await db().flushFiles();
+    });
+    afterEach(async () => {
+        if (conn) {
+            await conn.close();
+            conn = null;
+        }
+        await db().flushFiles();
+        await db().dropFiles();
+    });
+    describe('GitHub issues', () => {
+        it('1467', async () => {
+            // Baseline without cast: we expect decimal values to not handle fractional parts correctly
+            await db().open({
+                path: ':memory:',
+                query: {},
+            });
+            conn = await db().connect();
+            const resultWithoutCast = await conn.query(`select substring('🦆🦆🦆' from 3) AS result;`);
+            expect(resultWithoutCast.toArray()[0]?.result).toEqual('🦆');
+        });
+    });
+}

packages/duckdb-wasm/test/regression/index.ts

@@ -4,7 +4,8 @@ import { test334 } from './github_334.test';
 import { test393 } from './github_393.test';
 import { test448 } from './github_448.test';
 import { test470 } from './github_470.test';
-import { test477 } from "./github_477.test";
+import { test477 } from './github_477.test';
+import { test1467 } from './github_1467.test';
 
 export function testRegressionAsync(adb: () => duckdb.AsyncDuckDB): void {
     test332(adb);
@@ -13,4 +14,5 @@ export function testRegressionAsync(adb: () => duckdb.AsyncDuckDB): void {
     test448(adb);
     test470(adb);
     test477(adb);
+    test1467(adb);
 }