import assert from "node:assert/strict";
import test from "node:test";
import { finiteNumber, formatNumber, formatScaled } from "./display-format";

test("能源看板格式化边界区分真实零值与不可用值", () => {
  for (const value of [null, undefined, NaN, Infinity, -Infinity, "0"]) {
    assert.equal(finiteNumber(value), null);
    assert.equal(formatNumber(value), "—");
    assert.equal(formatScaled(value, 1000), "—");
  }
  assert.equal(formatNumber(0), "0.00");
  assert.equal(formatScaled(0, 1000), "0.00");
});