37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
import { describe, expect, test } from "bun:test"
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import { createScrollPersistence } from "./layout-scroll"
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describe("createScrollPersistence", () => {
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test("debounces persisted scroll writes", async () => {
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const snapshot = {
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session: {
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review: { x: 0, y: 0 },
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},
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} as Record<string, Record<string, { x: number; y: number }>>
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const writes: Array<Record<string, { x: number; y: number }>> = []
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const scroll = createScrollPersistence({
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debounceMs: 10,
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getSnapshot: (sessionKey) => snapshot[sessionKey],
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onFlush: (sessionKey, next) => {
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snapshot[sessionKey] = next
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writes.push(next)
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},
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})
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for (const i of Array.from({ length: 30 }, (_, n) => n + 1)) {
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scroll.setScroll("session", "review", { x: 0, y: i })
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}
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await new Promise((resolve) => setTimeout(resolve, 40))
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expect(writes).toHaveLength(1)
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expect(writes[0]?.review).toEqual({ x: 0, y: 30 })
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scroll.setScroll("session", "review", { x: 0, y: 30 })
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await new Promise((resolve) => setTimeout(resolve, 20))
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expect(writes).toHaveLength(1)
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scroll.dispose()
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})
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})
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