refactor: adjust tests for splitMultipart

src/utils/split-multipart.ts

@@ -19,9 +19,7 @@ export function splitMultipart(toSplit: Buffer, boundary: Buffer): Buffer[]
 export function splitMultipart(toSplit: Buffer, boundary: string, encoding?: BufferEncoding): Buffer[]
 export function splitMultipart(toSplit: Buffer, boundary: string | Buffer, encoding?: BufferEncoding): Buffer[] {
   const parts: Buffer[] = []
-  if (!(boundary instanceof Buffer)) {
-    boundary = Buffer.from(`\r\n--${boundary}`, encoding)
-  }
+  boundary = Buffer.from(`\r\n--${boundary}`, encoding)
 
   let currentIndex = 0
   let previousPartBeginIndex = 0

tests/utils/split-buffer.test.ts → tests/utils/split-multipart.test.ts

@@ -1,10 +1,10 @@
 import { expect, it } from 'vitest'
 
-import { splitBuffer } from '@/utils/split-buffer'
+import { splitMultipart } from '@/utils/split-multipart'
 
 it('should split correctly with string delimiter', () => {
-  const toSplit = Buffer.from('abc foo bar foo baz foo quux foo \n')
-  expect(splitBuffer(toSplit, ' foo ', 'utf-8')).toEqual([
+  const toSplit = Buffer.from('abc\r\n--foo\r\nbar\r\n--foo\r\nbaz\r\n--foo\r\nquux\r\n--foo--\r\n\n')
+  expect(splitMultipart(toSplit, 'foo', 'utf-8')).toEqual([
     Buffer.from('abc'),
     Buffer.from('bar'),
     Buffer.from('baz'),
@@ -14,8 +14,8 @@ it('should split correctly with string delimiter', () => {
 })
 
 it('should split correctly with buffer delimiter', () => {
-  const toSplit = Buffer.from('abc foo bar foo baz foo quux foo \n')
-  expect(splitBuffer(toSplit, Buffer.from(' foo '))).toEqual([
+  const toSplit = Buffer.from('abc\r\n--foo\r\nbar\r\n--foo\r\nbaz\r\n--foo\r\nquux\r\n--foo--\r\n\n')
+  expect(splitMultipart(toSplit, Buffer.from('foo'))).toEqual([
     Buffer.from('abc'),
     Buffer.from('bar'),
     Buffer.from('baz'),