chore: add tests for redirect

packages/pharaoh/test/http/res.redirect_test.dart

@@ -0,0 +1,31 @@
+import 'dart:io';
+
+import 'package:pharaoh/pharaoh.dart';
+import 'package:spookie/spookie.dart';
+
+void main() {
+  group('res.redirect', () {
+    test('should redirect to paths on the api', () async {
+      final app = Pharaoh()
+        ..get('/bar', (_, res) => res.ok('Finally here!'))
+        ..get('/foo', (_, res) => res.redirect('/bar', 301));
+
+      await (await request<Pharaoh>(app))
+          .get('/foo')
+          .expectStatus(HttpStatus.ok)
+          .expectBody("Finally here!")
+          .test();
+    });
+
+    test('should redirect to remote paths', () async {
+      final app = Pharaoh()
+        ..get('/foo', (_, res) => res.redirect('https://example.com', 301));
+
+      await (await request<Pharaoh>(app))
+          .get('/foo')
+          .expectStatus(HttpStatus.ok)
+          .expectBody(contains('Example Domain'))
+          .test();
+    });
+  });
+}