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| 1 | +import { test, expect, selectors, getCSSVariable, getThemeAttribute, goToThemedPage, STORAGE_KEY, themeColors } from '../fixtures/setup'; |
| 2 | + |
| 3 | +/** |
| 4 | + * Phase 3.5 — Browser Compatibility Tests (NFR-3.3) |
| 5 | + * |
| 6 | + * Run across Chromium, Firefox, and WebKit to verify: |
| 7 | + * - CSS custom properties work correctly |
| 8 | + * - data-theme attribute selector mechanism |
| 9 | + * - localStorage persistence |
| 10 | + * - matchMedia / prefers-color-scheme |
| 11 | + * - Theme toggle interaction |
| 12 | + * - No browser-specific rendering issues |
| 13 | + */ |
| 14 | + |
| 15 | +test.describe('Cross-Browser: CSS Custom Properties', () => { |
| 16 | + test('CSS variables resolve in light mode', async ({ page }) => { |
| 17 | + await goToThemedPage(page); |
| 18 | + |
| 19 | + for (const [variable, expected] of Object.entries(themeColors.light)) { |
| 20 | + const value = await getCSSVariable(page, variable); |
| 21 | + expect(value, `${variable} should be ${expected}`).toBe(expected); |
| 22 | + } |
| 23 | + }); |
| 24 | + |
| 25 | + test('CSS variables resolve in dark mode', async ({ page }) => { |
| 26 | + await goToThemedPage(page); |
| 27 | + await page.click(selectors.themeToggleButton); |
| 28 | + |
| 29 | + for (const [variable, expected] of Object.entries(themeColors.dark)) { |
| 30 | + const value = await getCSSVariable(page, variable); |
| 31 | + expect(value, `${variable} should be ${expected}`).toBe(expected); |
| 32 | + } |
| 33 | + }); |
| 34 | + |
| 35 | + test('[data-theme] selector overrides :root values', async ({ page }) => { |
| 36 | + await goToThemedPage(page); |
| 37 | + |
| 38 | + const result = await page.evaluate(() => { |
| 39 | + const before = getComputedStyle(document.documentElement) |
| 40 | + .getPropertyValue('--color-bg-main').trim().toLowerCase(); |
| 41 | + |
| 42 | + document.documentElement.setAttribute('data-theme', 'dark'); |
| 43 | + |
| 44 | + const after = getComputedStyle(document.documentElement) |
| 45 | + .getPropertyValue('--color-bg-main').trim().toLowerCase(); |
| 46 | + |
| 47 | + return { before, after }; |
| 48 | + }); |
| 49 | + |
| 50 | + expect(result.before).toBe('#fff'); |
| 51 | + expect(result.after).toBe('#18181b'); |
| 52 | + }); |
| 53 | +}); |
| 54 | + |
| 55 | +test.describe('Cross-Browser: Theme Toggle', () => { |
| 56 | + test('click toggles light to dark', async ({ page }) => { |
| 57 | + await goToThemedPage(page); |
| 58 | + expect(await getThemeAttribute(page)).toBe('light'); |
| 59 | + |
| 60 | + await page.click(selectors.themeToggleButton); |
| 61 | + expect(await getThemeAttribute(page)).toBe('dark'); |
| 62 | + }); |
| 63 | + |
| 64 | + test('click toggles dark to light', async ({ page }) => { |
| 65 | + await goToThemedPage(page); |
| 66 | + await page.click(selectors.themeToggleButton); |
| 67 | + expect(await getThemeAttribute(page)).toBe('dark'); |
| 68 | + |
| 69 | + await page.click(selectors.themeToggleButton); |
| 70 | + expect(await getThemeAttribute(page)).toBe('light'); |
| 71 | + }); |
| 72 | + |
| 73 | + test('icon visibility updates on toggle', async ({ page }) => { |
| 74 | + await goToThemedPage(page); |
| 75 | + |
| 76 | + const sunIcon = page.locator(selectors.sunIcon); |
| 77 | + const moonIcon = page.locator(selectors.moonIcon); |
| 78 | + |
| 79 | + await expect(sunIcon).toHaveCSS('display', 'block'); |
| 80 | + await expect(moonIcon).toHaveCSS('display', 'none'); |
| 81 | + |
| 82 | + await page.click(selectors.themeToggleButton); |
| 83 | + |
| 84 | + await expect(sunIcon).toHaveCSS('display', 'none'); |
| 85 | + await expect(moonIcon).toHaveCSS('display', 'block'); |
| 86 | + }); |
| 87 | + |
| 88 | + test('keyboard activation works', async ({ page }) => { |
| 89 | + await goToThemedPage(page); |
| 90 | + const button = page.locator(selectors.themeToggleButton); |
| 91 | + await button.focus(); |
| 92 | + |
| 93 | + await page.keyboard.press('Enter'); |
| 94 | + expect(await getThemeAttribute(page)).toBe('dark'); |
| 95 | + |
| 96 | + await page.keyboard.press('Space'); |
| 97 | + expect(await getThemeAttribute(page)).toBe('light'); |
| 98 | + }); |
| 99 | +}); |
| 100 | + |
| 101 | +test.describe('Cross-Browser: localStorage Persistence', () => { |
| 102 | + test('theme saves to localStorage', async ({ page }) => { |
| 103 | + await goToThemedPage(page); |
| 104 | + await page.click(selectors.themeToggleButton); |
| 105 | + |
| 106 | + const stored = await page.evaluate((key) => localStorage.getItem(key), STORAGE_KEY); |
| 107 | + expect(stored).toBe('dark'); |
| 108 | + }); |
| 109 | + |
| 110 | + test('theme restores from localStorage after reload', async ({ page }) => { |
| 111 | + await goToThemedPage(page); |
| 112 | + await page.click(selectors.themeToggleButton); |
| 113 | + |
| 114 | + await page.reload(); |
| 115 | + await page.waitForSelector(selectors.themeToggleButton, { timeout: 10000 }); |
| 116 | + |
| 117 | + expect(await getThemeAttribute(page)).toBe('dark'); |
| 118 | + }); |
| 119 | + |
| 120 | + test('localStorage API is available', async ({ page }) => { |
| 121 | + await goToThemedPage(page); |
| 122 | + |
| 123 | + const available = await page.evaluate(() => { |
| 124 | + try { |
| 125 | + const testKey = '__storage_test__'; |
| 126 | + localStorage.setItem(testKey, 'test'); |
| 127 | + localStorage.removeItem(testKey); |
| 128 | + return true; |
| 129 | + } catch { |
| 130 | + return false; |
| 131 | + } |
| 132 | + }); |
| 133 | + |
| 134 | + expect(available).toBe(true); |
| 135 | + }); |
| 136 | +}); |
| 137 | + |
| 138 | +test.describe('Cross-Browser: System Preference Detection', () => { |
| 139 | + test('matchMedia API is available', async ({ page }) => { |
| 140 | + await goToThemedPage(page); |
| 141 | + |
| 142 | + const available = await page.evaluate(() => { |
| 143 | + return typeof window.matchMedia === 'function'; |
| 144 | + }); |
| 145 | + |
| 146 | + expect(available).toBe(true); |
| 147 | + }); |
| 148 | + |
| 149 | + test('prefers-color-scheme: dark is detected when emulated', async ({ page }) => { |
| 150 | + await goToThemedPage(page); |
| 151 | + await page.evaluate((key) => localStorage.removeItem(key), STORAGE_KEY); |
| 152 | + |
| 153 | + await page.emulateMedia({ colorScheme: 'dark' }); |
| 154 | + |
| 155 | + await page.reload(); |
| 156 | + await page.waitForSelector(selectors.themeToggleButton, { timeout: 10000 }); |
| 157 | + |
| 158 | + expect(await getThemeAttribute(page)).toBe('dark'); |
| 159 | + }); |
| 160 | + |
| 161 | + test('prefers-color-scheme: light is detected when emulated', async ({ page }) => { |
| 162 | + await goToThemedPage(page); |
| 163 | + await page.evaluate((key) => localStorage.removeItem(key), STORAGE_KEY); |
| 164 | + |
| 165 | + await page.emulateMedia({ colorScheme: 'light' }); |
| 166 | + |
| 167 | + await page.reload(); |
| 168 | + await page.waitForSelector(selectors.themeToggleButton, { timeout: 10000 }); |
| 169 | + |
| 170 | + expect(await getThemeAttribute(page)).toBe('light'); |
| 171 | + }); |
| 172 | +}); |
| 173 | + |
| 174 | +test.describe('Cross-Browser: Rendered Colors', () => { |
| 175 | + test('body background is correct in dark mode', async ({ page }) => { |
| 176 | + await goToThemedPage(page); |
| 177 | + await page.click(selectors.themeToggleButton); |
| 178 | + |
| 179 | + const bodyBg = await page.evaluate(() => getComputedStyle(document.body).backgroundColor); |
| 180 | + expect(bodyBg).toBe('rgb(24, 24, 27)'); |
| 181 | + }); |
| 182 | + |
| 183 | + test('body background is correct in light mode', async ({ page }) => { |
| 184 | + await goToThemedPage(page); |
| 185 | + |
| 186 | + const bodyBg = await page.evaluate(() => getComputedStyle(document.body).backgroundColor); |
| 187 | + expect(bodyBg).toBe('rgb(255, 255, 255)'); |
| 188 | + }); |
| 189 | + |
| 190 | + test('text color updates in dark mode', async ({ page }) => { |
| 191 | + await goToThemedPage(page); |
| 192 | + await page.click(selectors.themeToggleButton); |
| 193 | + |
| 194 | + const bodyColor = await page.evaluate(() => getComputedStyle(document.body).color); |
| 195 | + expect(bodyColor).toBe('rgb(228, 228, 231)'); |
| 196 | + }); |
| 197 | + |
| 198 | + test('header background matches theme', async ({ page }) => { |
| 199 | + await goToThemedPage(page); |
| 200 | + await page.click(selectors.themeToggleButton); |
| 201 | + |
| 202 | + const headerBg = await page.evaluate(() => { |
| 203 | + const header = document.querySelector('header.docs-header'); |
| 204 | + return header ? getComputedStyle(header).backgroundColor : ''; |
| 205 | + }); |
| 206 | + expect(headerBg).toBe('rgb(24, 24, 27)'); |
| 207 | + }); |
| 208 | +}); |
| 209 | + |
| 210 | +test.describe('Cross-Browser: CustomEvent & API Support', () => { |
| 211 | + test('CustomEvent dispatches correctly', async ({ page }) => { |
| 212 | + await goToThemedPage(page); |
| 213 | + |
| 214 | + const received = await page.evaluate(() => { |
| 215 | + return new Promise<boolean>((resolve) => { |
| 216 | + document.addEventListener('themeChange', (e: Event) => { |
| 217 | + resolve((e as CustomEvent).detail?.theme === 'test'); |
| 218 | + }); |
| 219 | + document.dispatchEvent(new CustomEvent('themeChange', { |
| 220 | + detail: { theme: 'test' }, |
| 221 | + })); |
| 222 | + }); |
| 223 | + }); |
| 224 | + |
| 225 | + expect(received).toBe(true); |
| 226 | + }); |
| 227 | + |
| 228 | + test('MutationObserver detects data-theme attribute changes', async ({ page }) => { |
| 229 | + await goToThemedPage(page); |
| 230 | + |
| 231 | + const detected = await page.evaluate(() => { |
| 232 | + return new Promise<boolean>((resolve) => { |
| 233 | + const observer = new MutationObserver((mutations) => { |
| 234 | + for (const m of mutations) { |
| 235 | + if (m.attributeName === 'data-theme') { |
| 236 | + observer.disconnect(); |
| 237 | + resolve(true); |
| 238 | + } |
| 239 | + } |
| 240 | + }); |
| 241 | + observer.observe(document.documentElement, { attributes: true }); |
| 242 | + document.documentElement.setAttribute('data-theme', 'dark'); |
| 243 | + }); |
| 244 | + }); |
| 245 | + |
| 246 | + expect(detected).toBe(true); |
| 247 | + }); |
| 248 | +}); |
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