File size: 3,275 Bytes
f61bac1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | // SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2026, The OpenROAD Authors
import { describe, it, beforeEach } from 'node:test';
import assert from 'node:assert/strict';
import { JSDOM } from 'jsdom';
// Helper to create a fresh DOM environment with optional cookie/localStorage
// pre-seeded, then dynamically import theme.js (which runs on import).
async function loadTheme({ cookie, localStorageTheme, prefersDark } = {}) {
const dom = new JSDOM('<!DOCTYPE html><html><body></body></html>', {
url: 'http://localhost/',
});
globalThis.document = dom.window.document;
globalThis.localStorage = dom.window.localStorage;
if (cookie) {
// JSDOM supports document.cookie assignment.
dom.window.document.cookie = cookie;
}
if (localStorageTheme) {
dom.window.localStorage.setItem('or_theme', localStorageTheme);
}
globalThis.matchMedia = () => ({
matches: prefersDark === false, // prefers-color-scheme: light
addListener() {},
removeListener() {},
addEventListener() {},
removeEventListener() {},
dispatchEvent() { return false; },
});
// theme.js caches state on import, so we need a fresh import each time.
// Use a cache-busting query parameter.
const suffix = '?t=' + Date.now() + Math.random();
const mod = await import('../../src/theme.js' + suffix);
return { dom, mod };
}
describe('theme initialization', () => {
it('uses cookie when present', async () => {
const { dom } = await loadTheme({ cookie: 'or_theme=light' });
assert.equal(dom.window.document.documentElement.dataset.theme, 'light');
});
it('falls back to localStorage when no cookie', async () => {
const { dom } = await loadTheme({ localStorageTheme: 'dark' });
assert.equal(dom.window.document.documentElement.dataset.theme, 'dark');
});
it('prefers cookie over localStorage', async () => {
const { dom } = await loadTheme({
cookie: 'or_theme=dark',
localStorageTheme: 'light',
});
assert.equal(dom.window.document.documentElement.dataset.theme, 'dark');
});
it('falls back to OS preference when no stored theme', async () => {
// prefers-color-scheme: light → matches = true in our mock
const { dom } = await loadTheme({ prefersDark: false });
assert.equal(dom.window.document.documentElement.dataset.theme, 'light');
});
it('defaults to dark when OS prefers dark', async () => {
const { dom } = await loadTheme({ prefersDark: true });
assert.equal(dom.window.document.documentElement.dataset.theme, 'dark');
});
});
describe('setCookie', () => {
it('writes a cookie readable by getCookie', async () => {
const { dom, mod } = await loadTheme();
mod.setCookie('or_theme', 'light');
assert.ok(dom.window.document.cookie.includes('or_theme=light'));
});
it('overwrites previous value', async () => {
const { dom, mod } = await loadTheme({ cookie: 'or_theme=dark' });
mod.setCookie('or_theme', 'light');
// The new value should be present.
assert.ok(dom.window.document.cookie.includes('or_theme=light'));
});
});
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