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import { describe, expect, it } from "vitest";
import { clearTodos, getTodos, setTodos, type TodoState } from "./pure.js";
describe("getTodos", () => {
it("getTodos: returns fresh array copy (not the live array)", () => {
const state: TodoState = new Map();
setTodos(state, "c1", [{ content: "a", status: "pending" }]);
const snap = getTodos(state, "c1");
expect(snap).toHaveLength(1);
// mutating the snapshot array does not affect live state
snap.push({ content: "evil", status: "completed" });
expect(getTodos(state, "c1")).toHaveLength(1);
});
it("getTodos: empty array for unknown conversation", () => {
const state: TodoState = new Map();
expect(getTodos(state, "nope")).toEqual([]);
});
});
describe("setTodos", () => {
it("setTodos: replaces the list and returns a copy", () => {
const state: TodoState = new Map();
setTodos(state, "c1", [{ content: "first", status: "pending" }]);
// replace with a different list
const snap = setTodos(state, "c1", [{ content: "second", status: "in_progress" }]);
expect(snap).toHaveLength(1);
const first = snap[0];
if (first === undefined) throw new Error("expected an item");
expect(first.content).toBe("second");
// the previous list is gone
expect(getTodos(state, "c1").map((t) => t.content)).toEqual(["second"]);
});
});
describe("clearTodos", () => {
it("clearTodos: deletes the conversation's list", () => {
const state: TodoState = new Map();
setTodos(state, "c1", [{ content: "x", status: "pending" }]);
expect(getTodos(state, "c1")).toHaveLength(1);
clearTodos(state, "c1");
expect(getTodos(state, "c1")).toEqual([]);
// a second clear is a no-op
clearTodos(state, "c1");
expect(getTodos(state, "c1")).toEqual([]);
});
});
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