fix: jest tests RequestClient.spec.ts

src/api/viya/spec/writeStream.spec.ts

@@ -10,12 +10,22 @@ import {
 describe('writeStream', () => {
   const filename = 'test.txt'
   const content = 'test'
+
   let stream: WriteStream
 
   beforeAll(async () => {
     stream = await createWriteStream(filename)
   })
 
+  beforeEach(async () => {
+    await deleteFile(filename).catch(() => {}) // Ignore errors if the file doesn't exist
+    stream = await createWriteStream(filename)
+  })
+
+  afterEach(async () => {
+    await deleteFile(filename).catch(() => {}) // Ensure cleanup after test
+  })
+
   it('should resolve when the stream is written successfully', async () => {
     await expect(writeStream(stream, content)).toResolve()
     await expect(fileExists(filename)).resolves.toEqual(true)
@@ -25,11 +35,30 @@ describe('writeStream', () => {
   })
 
   it('should reject when the write errors out', async () => {
+    // Mock implementation of the write method
     jest
       .spyOn(stream, 'write')
-      .mockImplementation((_, callback) => callback(new Error('Test Error')))
+      .mockImplementation(
+        (
+          chunk: any,
+          encodingOrCb?:
+            | BufferEncoding
+            | ((error: Error | null | undefined) => void),
+          cb?: (error: Error | null | undefined) => void
+        ) => {
+          const callback =
+            typeof encodingOrCb === 'function' ? encodingOrCb : cb
+          if (callback) {
+            callback(new Error('Test Error')) // Simulate an error
+          }
+          return true // Simulate that the write operation was called
+        }
+      )
+
+    // Call the writeStream function and catch the error
     const error = await writeStream(stream, content).catch((e: any) => e)
 
+    // Assert that the error is correctly handled
     expect(error.message).toEqual('Test Error')
   })
 })