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import { describe, expect, test } from "bun:test"
import { terminalWriter } from "./terminal-writer"
describe("terminalWriter", () => {
test("buffers and flushes once per schedule", () => {
const calls: string[] = []
const scheduled: VoidFunction[] = []
const writer = terminalWriter(
(data) => calls.push(data),
(flush) => scheduled.push(flush),
)
writer.push("a")
writer.push("b")
writer.push("c")
expect(calls).toEqual([])
expect(scheduled).toHaveLength(1)
scheduled[0]?.()
expect(calls).toEqual(["abc"])
})
test("flush is a no-op when empty", () => {
const calls: string[] = []
const writer = terminalWriter(
(data) => calls.push(data),
(flush) => flush(),
)
writer.flush()
expect(calls).toEqual([])
})
})
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