feat: add filepicker package

packages/filepicker/src/Chunker/ByteChunker.spec.ts

@@ -0,0 +1,70 @@
+import { ByteChunker } from './ByteChunker'
+
+const chunkOfSize = (size: number) => {
+  return new TextEncoder().encode('a'.repeat(size))
+}
+
+describe('byte chunker', () => {
+  it('should hold back small chunks until minimum size is met', async () => {
+    let receivedBytes = new Uint8Array()
+    let numChunks = 0
+    const chunker = new ByteChunker(100, async (bytes) => {
+      numChunks++
+      receivedBytes = new Uint8Array([...receivedBytes, ...bytes])
+    })
+
+    await chunker.addBytes(chunkOfSize(50), false)
+    await chunker.addBytes(chunkOfSize(50), false)
+    await chunker.addBytes(chunkOfSize(50), false)
+    await chunker.addBytes(chunkOfSize(50), true)
+
+    expect(numChunks).toEqual(2)
+    expect(receivedBytes.length).toEqual(200)
+  })
+
+  it('should send back big chunks immediately', async () => {
+    let receivedBytes = new Uint8Array()
+    let numChunks = 0
+    const chunker = new ByteChunker(100, async (bytes) => {
+      numChunks++
+      receivedBytes = new Uint8Array([...receivedBytes, ...bytes])
+    })
+
+    await chunker.addBytes(chunkOfSize(150), false)
+    await chunker.addBytes(chunkOfSize(150), false)
+    await chunker.addBytes(chunkOfSize(150), false)
+    await chunker.addBytes(chunkOfSize(50), true)
+
+    expect(numChunks).toEqual(4)
+    expect(receivedBytes.length).toEqual(500)
+  })
+
+  it('last chunk should be popped regardless of size', async () => {
+    let receivedBytes = new Uint8Array()
+    let numChunks = 0
+    const chunker = new ByteChunker(100, async (bytes) => {
+      numChunks++
+      receivedBytes = new Uint8Array([...receivedBytes, ...bytes])
+    })
+
+    await chunker.addBytes(chunkOfSize(50), false)
+    await chunker.addBytes(chunkOfSize(25), true)
+
+    expect(numChunks).toEqual(1)
+    expect(receivedBytes.length).toEqual(75)
+  })
+
+  it('single chunk should be popped immediately', async () => {
+    let receivedBytes = new Uint8Array()
+    let numChunks = 0
+    const chunker = new ByteChunker(100, async (bytes) => {
+      numChunks++
+      receivedBytes = new Uint8Array([...receivedBytes, ...bytes])
+    })
+
+    await chunker.addBytes(chunkOfSize(50), true)
+
+    expect(numChunks).toEqual(1)
+    expect(receivedBytes.length).toEqual(50)
+  })
+})