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import { describe, expect, test } from "bun:test"
import type { Prompt } from "@/context/prompt"
import {
canNavigateHistoryAtCursor,
clonePromptParts,
normalizePromptHistoryEntry,
navigatePromptHistory,
prependHistoryEntry,
promptLength,
type PromptHistoryComment,
} from "./history"
const DEFAULT_PROMPT: Prompt = [{ type: "text", content: "", start: 0, end: 0 }]
const text = (value: string): Prompt => [{ type: "text", content: value, start: 0, end: value.length }]
const comment = (id: string, value = "note"): PromptHistoryComment => ({
id,
path: "src/a.ts",
selection: { start: 2, end: 4 },
comment: value,
time: 1,
origin: "review",
preview: "const a = 1",
})
describe("prompt-input history", () => {
test("prependHistoryEntry skips empty prompt and deduplicates consecutive entries", () => {
const first = prependHistoryEntry([], DEFAULT_PROMPT)
expect(first).toEqual([])
const commentsOnly = prependHistoryEntry([], DEFAULT_PROMPT, [comment("c1")])
expect(commentsOnly).toHaveLength(1)
const withOne = prependHistoryEntry([], text("hello"))
expect(withOne).toHaveLength(1)
const deduped = prependHistoryEntry(withOne, text("hello"))
expect(deduped).toBe(withOne)
const dedupedComments = prependHistoryEntry(commentsOnly, DEFAULT_PROMPT, [comment("c1")])
expect(dedupedComments).toBe(commentsOnly)
})
test("navigatePromptHistory restores saved prompt when moving down from newest", () => {
const entries = [text("third"), text("second"), text("first")]
const up = navigatePromptHistory({
direction: "up",
entries,
historyIndex: -1,
currentPrompt: text("draft"),
currentComments: [comment("draft")],
savedPrompt: null,
})
expect(up.handled).toBe(true)
if (!up.handled) throw new Error("expected handled")
expect(up.historyIndex).toBe(0)
expect(up.cursor).toBe("start")
expect(up.entry.comments).toEqual([])
const down = navigatePromptHistory({
direction: "down",
entries,
historyIndex: up.historyIndex,
currentPrompt: text("ignored"),
currentComments: [],
savedPrompt: up.savedPrompt,
})
expect(down.handled).toBe(true)
if (!down.handled) throw new Error("expected handled")
expect(down.historyIndex).toBe(-1)
expect(down.entry.prompt[0]?.type === "text" ? down.entry.prompt[0].content : "").toBe("draft")
expect(down.entry.comments).toEqual([comment("draft")])
})
test("navigatePromptHistory keeps entry comments when moving through history", () => {
const entries = [
{
prompt: text("with comment"),
comments: [comment("c1")],
},
]
const up = navigatePromptHistory({
direction: "up",
entries,
historyIndex: -1,
currentPrompt: text("draft"),
currentComments: [],
savedPrompt: null,
})
expect(up.handled).toBe(true)
if (!up.handled) throw new Error("expected handled")
expect(up.entry.prompt[0]?.type === "text" ? up.entry.prompt[0].content : "").toBe("with comment")
expect(up.entry.comments).toEqual([comment("c1")])
})
test("normalizePromptHistoryEntry supports legacy prompt arrays", () => {
const entry = normalizePromptHistoryEntry(text("legacy"))
expect(entry.prompt[0]?.type === "text" ? entry.prompt[0].content : "").toBe("legacy")
expect(entry.comments).toEqual([])
})
test("helpers clone prompt and count text content length", () => {
const original: Prompt = [
{ type: "text", content: "one", start: 0, end: 3 },
{
type: "file",
path: "src/a.ts",
content: "@src/a.ts",
start: 3,
end: 12,
selection: { startLine: 1, startChar: 1, endLine: 2, endChar: 1 },
},
{ type: "image", id: "1", filename: "img.png", mime: "image/png", dataUrl: "data:image/png;base64,abc" },
]
const copy = clonePromptParts(original)
expect(copy).not.toBe(original)
expect(promptLength(copy)).toBe(12)
if (copy[1]?.type !== "file") throw new Error("expected file")
copy[1].selection!.startLine = 9
if (original[1]?.type !== "file") throw new Error("expected file")
expect(original[1].selection?.startLine).toBe(1)
})
test("canNavigateHistoryAtCursor only allows prompt boundaries", () => {
const value = "a\nb\nc"
expect(canNavigateHistoryAtCursor("up", value, 0)).toBe(false)
expect(canNavigateHistoryAtCursor("down", value, 0)).toBe(false)
expect(canNavigateHistoryAtCursor("up", value, 2)).toBe(false)
expect(canNavigateHistoryAtCursor("down", value, 2)).toBe(false)
expect(canNavigateHistoryAtCursor("up", value, 5)).toBe(false)
expect(canNavigateHistoryAtCursor("down", value, 5)).toBe(true)
expect(canNavigateHistoryAtCursor("up", "abc", 0)).toBe(false)
expect(canNavigateHistoryAtCursor("down", "abc", 3)).toBe(true)
expect(canNavigateHistoryAtCursor("up", "abc", 1)).toBe(false)
expect(canNavigateHistoryAtCursor("down", "abc", 1)).toBe(false)
expect(canNavigateHistoryAtCursor("up", "", 0)).toBe(true)
expect(canNavigateHistoryAtCursor("down", "", 0)).toBe(true)
expect(canNavigateHistoryAtCursor("up", "abc", 0, true)).toBe(true)
expect(canNavigateHistoryAtCursor("up", "abc", 3, true)).toBe(true)
expect(canNavigateHistoryAtCursor("down", "abc", 0, true)).toBe(true)
expect(canNavigateHistoryAtCursor("down", "abc", 3, true)).toBe(true)
expect(canNavigateHistoryAtCursor("up", "abc", 1, true)).toBe(false)
expect(canNavigateHistoryAtCursor("down", "abc", 1, true)).toBe(false)
})
})
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