Files
tf_code/packages/app/src/components/prompt-input/editor-dom.test.ts
2026-02-06 09:37:49 -06:00

52 lines
2.1 KiB
TypeScript

import { describe, expect, test } from "bun:test"
import { createTextFragment, getCursorPosition, getNodeLength, getTextLength, setCursorPosition } from "./editor-dom"
describe("prompt-input editor dom", () => {
test("createTextFragment preserves newlines with br and zero-width placeholders", () => {
const fragment = createTextFragment("foo\n\nbar")
const container = document.createElement("div")
container.appendChild(fragment)
expect(container.childNodes.length).toBe(5)
expect(container.childNodes[0]?.textContent).toBe("foo")
expect((container.childNodes[1] as HTMLElement).tagName).toBe("BR")
expect(container.childNodes[2]?.textContent).toBe("\u200B")
expect((container.childNodes[3] as HTMLElement).tagName).toBe("BR")
expect(container.childNodes[4]?.textContent).toBe("bar")
})
test("length helpers treat breaks as one char and ignore zero-width chars", () => {
const container = document.createElement("div")
container.appendChild(document.createTextNode("ab\u200B"))
container.appendChild(document.createElement("br"))
container.appendChild(document.createTextNode("cd"))
expect(getNodeLength(container.childNodes[0]!)).toBe(2)
expect(getNodeLength(container.childNodes[1]!)).toBe(1)
expect(getTextLength(container)).toBe(5)
})
test("setCursorPosition and getCursorPosition round-trip with pills and breaks", () => {
const container = document.createElement("div")
const pill = document.createElement("span")
pill.dataset.type = "file"
pill.textContent = "@file"
container.appendChild(document.createTextNode("ab"))
container.appendChild(pill)
container.appendChild(document.createElement("br"))
container.appendChild(document.createTextNode("cd"))
document.body.appendChild(container)
setCursorPosition(container, 2)
expect(getCursorPosition(container)).toBe(2)
setCursorPosition(container, 7)
expect(getCursorPosition(container)).toBe(7)
setCursorPosition(container, 8)
expect(getCursorPosition(container)).toBe(8)
container.remove()
})
})