spb/earth-now Public License

1/**2 * earth-now.co3 * Author:  Simon-Pierre Boucher4 * Contact: contact@spboucher.ai5 * File:    apps/web/test/consistency.jsdom.test.ts6 * Purpose: Client/server consistency — counterValue in the JSDOM (browser-like) environment must match the same closed-form values bit-for-bit7 *8 * @vitest-environment jsdom9 */1011import { describe, expect, it } from "vitest";12import { counterValue, parseIsoUtc } from "@earth-now/counter";13import {14  INSTANTS,15  LINEAR_MODEL,16  SEASONAL_MODEL,17  linearClosedForm,18  seasonalClosedForm,19} from "./consistency-shared";2021describe("counterValue consistency (jsdom environment)", () => {22  it("runs in a browser-like environment (DOM present)", () => {23    expect(typeof globalThis.window).not.toBe("undefined");24    expect(typeof document).not.toBe("undefined");25  });2627  it("value(anchorTime) === anchorValue exactly", () => {28    const anchorMs = parseIsoUtc(LINEAR_MODEL.anchorTime);29    expect(Object.is(counterValue(LINEAR_MODEL, anchorMs), LINEAR_MODEL.anchorValue)).toBe(true);30    expect(Object.is(counterValue(SEASONAL_MODEL, anchorMs), SEASONAL_MODEL.anchorValue)).toBe(31      true,32    );33  });3435  it("matches the linear closed form bit-for-bit at all five instants (same values as node)", () => {36    for (const t of INSTANTS) {37      expect(Object.is(counterValue(LINEAR_MODEL, t), linearClosedForm(t))).toBe(true);38    }39  });4041  it("matches the seasonal closed form bit-for-bit at all five instants (same values as node)", () => {42    for (const t of INSTANTS) {43      expect(Object.is(counterValue(SEASONAL_MODEL, t), seasonalClosedForm(t))).toBe(true);44    }45  });4647  it("is deterministic: re-evaluation yields Object.is-identical numbers", () => {48    for (const t of INSTANTS) {49      expect(Object.is(counterValue(LINEAR_MODEL, t), counterValue(LINEAR_MODEL, t))).toBe(true);50      expect(Object.is(counterValue(SEASONAL_MODEL, t), counterValue(SEASONAL_MODEL, t))).toBe(51        true,52      );53    }54  });55});56