add: unit and integration testing

app/node_modules/jest-docblock/build/index.d.ts

@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+export declare function extract(contents: string): string;
+
+export declare function parse(docblock: string): Pragmas;
+
+export declare function parseWithComments(docblock: string): {
+  comments: string;
+  pragmas: Pragmas;
+};
+
+export declare type Pragmas = Record<string, string | Array<string>>;
+
+declare function print_2({
+  comments,
+  pragmas,
+}: {
+  comments?: string;
+  pragmas?: Pragmas;
+}): string;
+export {print_2 as print};
+
+export declare function strip(contents: string): string;