chore: import upstream snapshot with attribution

drizzle-orm/tests/is.test.ts

@@ -0,0 +1,16 @@
+import { describe, test } from 'vitest';
+import { Column, is } from '~/index.ts';
+import { PgArray, PgColumn, PgSerial, pgTable, serial } from '~/pg-core/index.ts';
+
+const pgExampleTable = pgTable('test', {
+	a: serial('a').array(),
+});
+
+describe.concurrent('is', () => {
+	test('Column', ({ expect }) => {
+		expect(is(pgExampleTable.a, Column)).toBe(true);
+		expect(is(pgExampleTable.a, PgColumn)).toBe(true);
+		expect(is(pgExampleTable.a, PgArray)).toBe(true);
+		expect(is(pgExampleTable.a, PgSerial)).toBe(false);
+	});
+});