pg_dump fails when specifying dataDir

packages/pglite-tools/tests/pg_dump.test.ts

@@ -4,7 +4,13 @@ import { pgDump } from '../dist/pg_dump.js'
 
 describe('pgDump', () => {
   it('should dump an empty database', async () => {
-    const pg = await PGlite.create()
+    const pg = await PGlite.create({
+      database: 'template1',
+      debug: undefined,
+      defaultDataTransferContainer: 'file',
+      relaxedDurability: false,
+      username: 'postgres',
+    })
     const dump = await pgDump({ pg })
 
     expect(dump).toBeInstanceOf(File)
@@ -61,6 +67,41 @@ describe('pgDump', () => {
     expect(content).toContain('42')
   })
 
+  it('specify datadir: should dump a database with tables and data', async () => {
+    const pg = await PGlite.create({
+      // dataDir: 'idb://benchmark-rd',
+      dataDir: '/tmp/my_data_dir',
+    })
+
+    // Create test tables and insert data
+    await pg.exec(`
+      CREATE TABLE test1 (
+        id SERIAL PRIMARY KEY,
+        name TEXT
+      );
+      INSERT INTO test1 (name) VALUES ('test1-row1');
+
+      CREATE TABLE test2 (
+        id SERIAL PRIMARY KEY,
+        value INTEGER
+      );
+      INSERT INTO test2 (value) VALUES (42);
+    `)
+
+    const dump = await pgDump({ pg })
+    const content = await dump.text()
+
+    // Check for table creation
+    expect(content).toContain('CREATE TABLE public.test1')
+    expect(content).toContain('CREATE TABLE public.test2')
+
+    // Check for data inserts
+    expect(content).toContain('INSERT INTO public.test1')
+    expect(content).toContain("'test1-row1'")
+    expect(content).toContain('INSERT INTO public.test2')
+    expect(content).toContain('42')
+  })
+
   it('should respect custom filename', async () => {
     const pg = await PGlite.create()
     const dump = await pgDump({ pg, fileName: 'custom.sql' })