Function encodeFrame

packages/start-client-core/tests/frame-decoder.test.ts:8–20

* Helper to encode a frame for testing

(
  type: number,
  streamId: number,
  payload: Uint8Array,
)

 * Helper to encode a frame for testing
 */
function encodeFrame(
  type: number,
  streamId: number,
  payload: Uint8Array,
): Uint8Array {
  const frame = new Uint8Array(FRAME_HEADER_SIZE + payload.length)
  const view = new DataView(frame.buffer)
  view.setUint8(0, type)
  view.setUint32(1, streamId, false)
  view.setUint32(5, payload.length, false)
  frame.set(payload, FRAME_HEADER_SIZE)
  return frame
}

function encodeJSONFrame(json: string): Uint8Array {
  return encodeFrame(FrameType.JSON, 0, new TextEncoder().encode(json))