restructure js bindings

bindings/javascript/packages/native/compat.test.ts

@@ -0,0 +1,67 @@
+import { unlinkSync } from "node:fs";
+import { expect, test } from 'vitest'
+import { Database } from './compat.js'
+
+test('in-memory db', () => {
+    const db = new Database(":memory:");
+    db.exec("CREATE TABLE t(x)");
+    db.exec("INSERT INTO t VALUES (1), (2), (3)");
+    const stmt = db.prepare("SELECT * FROM t WHERE x % 2 = ?");
+    const rows = stmt.all([1]);
+    expect(rows).toEqual([{ x: 1 }, { x: 3 }]);
+})
+
+test('on-disk db', () => {
+    const path = `test-${(Math.random() * 10000) | 0}.db`;
+    try {
+        const db1 = new Database(path);
+        db1.exec("CREATE TABLE t(x)");
+        db1.exec("INSERT INTO t VALUES (1), (2), (3)");
+        const stmt1 = db1.prepare("SELECT * FROM t WHERE x % 2 = ?");
+        expect(stmt1.columns()).toEqual([{ name: "x", column: null, database: null, table: null, type: null }]);
+        const rows1 = stmt1.all([1]);
+        expect(rows1).toEqual([{ x: 1 }, { x: 3 }]);
+        db1.close();
+
+        const db2 = new Database(path);
+        const stmt2 = db2.prepare("SELECT * FROM t WHERE x % 2 = ?");
+        expect(stmt2.columns()).toEqual([{ name: "x", column: null, database: null, table: null, type: null }]);
+        const rows2 = stmt2.all([1]);
+        expect(rows2).toEqual([{ x: 1 }, { x: 3 }]);
+        db2.close();
+    } finally {
+        unlinkSync(path);
+        unlinkSync(`${path}-wal`);
+    }
+})
+
+test('attach', () => {
+    const path1 = `test-${(Math.random() * 10000) | 0}.db`;
+    const path2 = `test-${(Math.random() * 10000) | 0}.db`;
+    try {
+        const db1 = new Database(path1);
+        db1.exec("CREATE TABLE t(x)");
+        db1.exec("INSERT INTO t VALUES (1), (2), (3)");
+        const db2 = new Database(path2);
+        db2.exec("CREATE TABLE q(x)");
+        db2.exec("INSERT INTO q VALUES (4), (5), (6)");
+
+        db1.exec(`ATTACH '${path2}' as secondary`);
+
+        const stmt = db1.prepare("SELECT * FROM t UNION ALL SELECT * FROM secondary.q");
+        expect(stmt.columns()).toEqual([{ name: "x", column: null, database: null, table: null, type: null }]);
+        const rows = stmt.all([1]);
+        expect(rows).toEqual([{ x: 1 }, { x: 2 }, { x: 3 }, { x: 4 }, { x: 5 }, { x: 6 }]);
+    } finally {
+        unlinkSync(path1);
+        unlinkSync(`${path1}-wal`);
+        unlinkSync(path2);
+        unlinkSync(`${path2}-wal`);
+    }
+})
+
+test('blobs', () => {
+    const db = new Database(":memory:");
+    const rows = db.prepare("SELECT x'1020' as x").all();
+    expect(rows).toEqual([{ x: Buffer.from([16, 32]) }])
+})