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import { describe, expect, test } from "bun:test"
import { nextTabListScrollLeft } from "./file-tab-scroll"
describe("nextTabListScrollLeft", () => {
test("does not scroll when width shrinks", () => {
const left = nextTabListScrollLeft({
prevScrollWidth: 500,
scrollWidth: 420,
clientWidth: 300,
prevContextOpen: false,
contextOpen: false,
})
expect(left).toBeUndefined()
})
test("scrolls to start when context tab opens", () => {
const left = nextTabListScrollLeft({
prevScrollWidth: 400,
scrollWidth: 500,
clientWidth: 320,
prevContextOpen: false,
contextOpen: true,
})
expect(left).toBe(0)
})
test("scrolls to right edge for new file tabs", () => {
const left = nextTabListScrollLeft({
prevScrollWidth: 500,
scrollWidth: 780,
clientWidth: 300,
prevContextOpen: true,
contextOpen: true,
})
expect(left).toBe(480)
})
})
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