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import { describe, expect, it } from "vitest";
import { parseTablePayload } from "./table";

describe("parseTablePayload", () => {
  it("parses a well-formed table payload", () => {
    const data = parseTablePayload({
      columns: ["Name", "Version"],
      rows: [
        ["alpha", "1.0"],
        ["beta", "2.3"],
      ],
    });
    expect(data).toEqual({
      columns: ["Name", "Version"],
      rows: [
        ["alpha", "1.0"],
        ["beta", "2.3"],
      ],
    });
  });

  it("coerces numeric and boolean cells to strings", () => {
    const data = parseTablePayload({
      columns: ["k", "n", "b"],
      rows: [["x", 42, true]],
    });
    expect(data?.rows[0]).toEqual(["x", "42", "true"]);
  });

  it("accepts an empty rows array", () => {
    expect(parseTablePayload({ columns: ["A"], rows: [] })).toEqual({ columns: ["A"], rows: [] });
  });

  it.each([
    ["null", null],
    ["a number", 7],
    ["a string", "nope"],
    ["missing columns", { rows: [] }],
    ["missing rows", { columns: ["A"] }],
    ["non-string column", { columns: [1], rows: [] }],
    ["row that is not an array", { columns: ["A"], rows: ["x"] }],
    ["cell of unsupported type", { columns: ["A"], rows: [[{ nested: true }]] }],
    ["non-finite numeric cell", { columns: ["A"], rows: [[Number.NaN]] }],
  ])("returns null for invalid payload: %s", (_label, payload) => {
    expect(parseTablePayload(payload)).toBeNull();
  });
});