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import { describe, expect, it } from "vitest";
import { parseTodoPayload, type TodoItem } from "./todo";
const item = (content: string, status: TodoItem["status"] = "pending"): TodoItem => ({
content,
status,
});
describe("parseTodoPayload", () => {
it("parses a well-formed payload with items", () => {
const data = parseTodoPayload({
todos: [
item("Write tests", "in_progress"),
item("Ship it", "pending"),
item("Read docs", "completed"),
],
});
expect(data).toEqual({
todos: [
item("Write tests", "in_progress"),
item("Ship it", "pending"),
item("Read docs", "completed"),
],
});
});
it("parses an empty-todos payload", () => {
expect(parseTodoPayload({ todos: [] })).toEqual({ todos: [] });
});
it("preserves item order", () => {
const data = parseTodoPayload({ todos: [item("a"), item("b"), item("c")] });
expect(data?.todos.map((t) => t.content)).toEqual(["a", "b", "c"]);
});
it("accepts all four status values", () => {
const data = parseTodoPayload({
todos: [
item("p", "pending"),
item("i", "in_progress"),
item("c", "completed"),
item("x", "cancelled"),
],
});
expect(data?.todos.map((t) => t.status)).toEqual([
"pending",
"in_progress",
"completed",
"cancelled",
]);
});
it.each([
["null", null],
["a number", 7],
["a string", "nope"],
["missing todos key", { foo: [] }],
["todos not an array", { todos: "x" }],
["entry not an object", { todos: ["x"] }],
["entry missing content", { todos: [{ status: "pending" }] }],
["entry with non-string content", { todos: [{ content: 1, status: "pending" }] }],
["entry missing status", { todos: [{ content: "x" }] }],
["entry with invalid status", { todos: [item("x", "done" as never)] }],
])("returns null for invalid payload: %s", (_label, payload) => {
expect(parseTodoPayload(payload)).toBeNull();
});
});
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