test: add unit tests for stmt.iterate()

Author: tpoisseau

test/parallel/test-sqlite.js

@@ -265,6 +265,34 @@ suite('StatementSync.prototype.all()', () => {
   });
 });
 
+suite('StatementSync.prototype.iterate()', () => {
+  test('executes a query and returns an empty iterator on no results', (t) => {
+    const db = new DatabaseSync(nextDb());
+    const stmt = db.prepare('CREATE TABLE storage(key TEXT, val TEXT)');
+    t.assert.deepStrictEqual(stmt.iterate().toArray(), []);
+  });
+
+  test('executes a query and returns all results', (t) => {
+    const db = new DatabaseSync(nextDb());
+    let stmt = db.prepare('CREATE TABLE storage(key TEXT, val TEXT)');
+    t.assert.deepStrictEqual(stmt.run(), { changes: 0, lastInsertRowid: 0 });
+    stmt = db.prepare('INSERT INTO storage (key, val) VALUES (?, ?)');
+    t.assert.deepStrictEqual(
+      stmt.run('key1', 'val1'),
+      { changes: 1, lastInsertRowid: 1 },
+    );
+    t.assert.deepStrictEqual(
+      stmt.run('key2', 'val2'),
+      { changes: 1, lastInsertRowid: 2 },
+    );
+    stmt = db.prepare('SELECT * FROM storage ORDER BY key');
+    t.assert.deepStrictEqual(stmt.iterate().toArray(), [
+      { key: 'key1', val: 'val1' },
+      { key: 'key2', val: 'val2' },
+    ]);
+  });
+})
+
 suite('StatementSync.prototype.run()', () => {
   test('executes a query and returns change metadata', (t) => {
     const db = new DatabaseSync(nextDb());