Added test to s3 formatter

__tests__/s3/formatters.test.ts

@@ -0,0 +1,30 @@
+import { streamToString } from '../../src/s3'
+import stream from 'stream'
+
+describe('streamToString', () => {
+  it('should convert a stream to a string', async () => {
+    const readable = new stream.Readable()
+
+    readable._read = () => {}
+    readable.push('Hello, ')
+    readable.push('world!')
+    readable.push(null)
+
+    const result = await streamToString(readable)
+    expect(result).toEqual('Hello, world!')
+  })
+
+  it('should convert a JSON stream to a string', async () => {
+    const json = { name: 'John Doe', age: 30 }
+    const jsonString = JSON.stringify(json)
+    const readable = new stream.Readable()
+
+    readable._read = () => {}
+    readable.push(jsonString)
+
+    const result = await streamToString(readable)
+    expect(result).toEqual(jsonString)
+  })
+
+
+})

src/s3/index.ts

@@ -1,2 +1,2 @@
 export * from './s3Service'
-
+export * from './formatters'