import { describe, expect, it } from "vite-plus/test"; import { defaultThemeGeneration, defaultThemeToApply } from "./useDefaultTheme"; const BASE = {  environmentId: "env-1",  defaultTheme: "nightfall",  defaultThemeSetAt: "2026-08-28T00:00:00.000Z",  appliedGeneration: null,  resolves: true,} as const; describe("default theme adoption", () => {  it("applies a set this client has not seen", () => {    expect(defaultThemeToApply(BASE)).toBe(      defaultThemeGeneration(BASE.defaultTheme, BASE.defaultThemeSetAt),    );  });   it("does not replay a generation it already applied", () => {    const generation = defaultThemeGeneration(BASE.defaultTheme, BASE.defaultThemeSetAt);    expect(defaultThemeToApply({ ...BASE, appliedGeneration: generation })).toBe(null);  });   // `t3 theme set` of a theme this client already wears must still act, which  // is why the generation carries the set time and not just the value.  it("applies the same theme again when the environment re-sets it", () => {    const applied = defaultThemeGeneration(BASE.defaultTheme, "2026-08-28T00:00:00.000Z");    const next = defaultThemeToApply({      ...BASE,      defaultThemeSetAt: "2026-08-29T00:00:00.000Z",      appliedGeneration: applied,    });    expect(next).not.toBe(null);    expect(next).not.toBe(applied);  });   // Environments provisioned before the timestamp existed.  it("falls back to once-per-value without a set time", () => {    const generation = defaultThemeGeneration("nightfall", "");    expect(defaultThemeToApply({ ...BASE, defaultThemeSetAt: "", appliedGeneration: null })).toBe(      generation,    );    expect(      defaultThemeToApply({ ...BASE, defaultThemeSetAt: "", appliedGeneration: generation }),    ).toBe(null);  });   // The setting and the palette it names arrive independently.  it("waits for a theme that has not arrived yet", () => {    expect(defaultThemeToApply({ ...BASE, resolves: false })).toBe(null);  });   it("leaves a client alone with no environment or no theme set", () => {    expect(defaultThemeToApply({ ...BASE, environmentId: null })).toBe(null);    expect(defaultThemeToApply({ ...BASE, defaultTheme: "" })).toBe(null);  });});