openAgent

1import { describe, expect, test } from "bun:test"
2import { PtyProtocol } from "@opencode-ai/core/pty/protocol"
3 
4describe("pty protocol", () => {
5  test("drops invalid binary input frames and decodes valid ones", () => {
6    expect(PtyProtocol.decodeInput("ready")).toBe("ready")
7    expect(PtyProtocol.decodeInput(new Uint8Array([0xff, 0xfe, 0xfd]))).toBeUndefined()
8    expect(PtyProtocol.decodeInput(new TextEncoder().encode("hello"))).toBe("hello")
9    expect(PtyProtocol.decodeInput(new TextEncoder().encode("hello").buffer)).toBe("hello")
10  })
11 
12  test("encodes the cursor as a 0x00-prefixed JSON control frame", () => {
13    const frame = PtyProtocol.metaFrame(42)
14    expect(frame[0]).toBe(0)
15    expect(JSON.parse(new TextDecoder().decode(frame.subarray(1)))).toEqual({ cursor: 42 })
16  })
17 
18  test("splits replay into bounded frames", () => {
19    expect(PtyProtocol.chunks("")).toEqual([])
20    expect(PtyProtocol.chunks("abc")).toEqual(["abc"])
21    const big = "x".repeat(PtyProtocol.REPLAY_CHUNK + 1)
22    const frames = PtyProtocol.chunks(big)
23    expect(frames.length).toBe(2)
24    expect(frames[0].length).toBe(PtyProtocol.REPLAY_CHUNK)
25    expect(frames.join("")).toBe(big)
26  })
27})
28