From 50138ceb028b9e97a00aa1d5f38fd95c456a4c29 Mon Sep 17 00:00:00 2001
From: Jasmine <jasminee@gmail.com>
Date: Wed, 21 Feb 2024 16:58:36 -0500
Subject: [PATCH 1/4] set esModuleInterop to true,

---
 tsconfig.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tsconfig.json b/tsconfig.json
index 896f946..b2a9bd5 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,7 +8,8 @@
     "removeComments": true,
     "sourceMap": true,
     "target": "ES2020",
-    "outDir": "lib"
+    "outDir": "lib",
+    "esModuleInterop": true,
   },
   "include": ["src/**/*.ts", "serverless.ts"],
   "exclude": [

From b5af5c0974031b4508dd63eb486f1f76e03681d1 Mon Sep 17 00:00:00 2001
From: Jasmine <jasminee@gmail.com>
Date: Wed, 21 Feb 2024 16:58:47 -0500
Subject: [PATCH 2/4] lambda.ts test

---
 src/libs/lambda.test.ts | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/libs/lambda.test.ts

diff --git a/src/libs/lambda.test.ts b/src/libs/lambda.test.ts
new file mode 100644
index 0000000..856abb7
--- /dev/null
+++ b/src/libs/lambda.test.ts
@@ -0,0 +1,24 @@
+import middy from '@middy/core';
+import middyJsonBodyParser from '@middy/http-json-body-parser';
+import { middyfy } from './lambda';
+
+jest.mock('@middy/core', () => {
+  return jest.fn().mockImplementation(() => {
+    return { use: jest.fn() };
+  });
+});
+
+jest.mock('@middy/http-json-body-parser');
+
+const mockJsonBodyParser = middyJsonBodyParser as jest.Mock;
+const mockMiddy = middy as jest.Mocked<typeof middy>;
+
+describe('middyfy', () => {
+  it('should wrap handler with middy and applies the JSON body parser', () => {
+    const handler = jest.fn();
+    middyfy(handler);
+    expect(mockMiddy).toHaveBeenCalledWith(handler);
+    expect(mockMiddy).toHaveBeenCalledTimes(1);
+    expect(mockJsonBodyParser).toHaveBeenCalledTimes(1);
+  });
+});

From 4ab6718125abe39db3ed40a57f26a9886e67f252 Mon Sep 17 00:00:00 2001
From: Jasmine <jasminee@gmail.com>
Date: Thu, 22 Feb 2024 15:05:50 -0500
Subject: [PATCH 3/4] lambda.ts test

---
 src/libs/lambda.test.ts | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/src/libs/lambda.test.ts b/src/libs/lambda.test.ts
index 856abb7..669511c 100644
--- a/src/libs/lambda.test.ts
+++ b/src/libs/lambda.test.ts
@@ -3,22 +3,20 @@ import middyJsonBodyParser from '@middy/http-json-body-parser';
 import { middyfy } from './lambda';
 
 jest.mock('@middy/core', () => {
-  return jest.fn().mockImplementation(() => {
-    return { use: jest.fn() };
-  });
+  const use = jest.fn().mockImplementation(() => 'middyfied handler');
+  return jest.fn().mockImplementation(() => ({ use }));
 });
-
 jest.mock('@middy/http-json-body-parser');
 
-const mockJsonBodyParser = middyJsonBodyParser as jest.Mock;
-const mockMiddy = middy as jest.Mocked<typeof middy>;
+const mockMiddy = middy as jest.MockedFunction<typeof middy>;
 
 describe('middyfy', () => {
-  it('should wrap handler with middy and applies the JSON body parser', () => {
+  it('should wrap handler with middy, apply JSON body parser, and return middy instance', () => {
     const handler = jest.fn();
-    middyfy(handler);
-    expect(mockMiddy).toHaveBeenCalledWith(handler);
-    expect(mockMiddy).toHaveBeenCalledTimes(1);
-    expect(mockJsonBodyParser).toHaveBeenCalledTimes(1);
+    const middyfiedHandler = middyfy(handler);
+    expect(middy).toHaveBeenCalledWith(handler);
+    const mockMiddyInstance = mockMiddy.mock.results[0].value;
+    expect(mockMiddyInstance.use).toHaveBeenCalledWith(middyJsonBodyParser());
+    expect(middyfiedHandler).toBe('middyfied handler');
   });
 });

From 7af5886d6afa1e71d89e74938c5adb2a1fe60c66 Mon Sep 17 00:00:00 2001
From: Jasmine <jasminee@gmail.com>
Date: Thu, 22 Feb 2024 18:25:07 -0500
Subject: [PATCH 4/4] updated constant name

---
 src/libs/lambda.test.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libs/lambda.test.ts b/src/libs/lambda.test.ts
index 669511c..b0a1ea5 100644
--- a/src/libs/lambda.test.ts
+++ b/src/libs/lambda.test.ts
@@ -8,14 +8,14 @@ jest.mock('@middy/core', () => {
 });
 jest.mock('@middy/http-json-body-parser');
 
-const mockMiddy = middy as jest.MockedFunction<typeof middy>;
+const MOCK_MIDDY = middy as jest.MockedFunction<typeof middy>;
 
 describe('middyfy', () => {
   it('should wrap handler with middy, apply JSON body parser, and return middy instance', () => {
     const handler = jest.fn();
     const middyfiedHandler = middyfy(handler);
     expect(middy).toHaveBeenCalledWith(handler);
-    const mockMiddyInstance = mockMiddy.mock.results[0].value;
+    const mockMiddyInstance = MOCK_MIDDY.mock.results[0].value;
     expect(mockMiddyInstance.use).toHaveBeenCalledWith(middyJsonBodyParser());
     expect(middyfiedHandler).toBe('middyfied handler');
   });