Add profile QR code for sharing and inviting friends (#10659)

src/features/inviteFriends/themes.test.ts

@@ -0,0 +1,28 @@
+import {describe, expect, it} from '@jest/globals'
+
+import {getInviteTheme, INVITE_THEME_KEYS, INVITE_THEMES} from './themes'
+
+describe('invite themes', () => {
+  it('exposes four themes in canonical order', () => {
+    expect(INVITE_THEME_KEYS).toEqual(['dawn', 'day', 'dusk', 'night'])
+  })
+
+  it('has light and dark variants for every theme', () => {
+    for (const key of INVITE_THEME_KEYS) {
+      const theme = INVITE_THEMES[key]
+      expect(theme.light.qrPrimary).toMatch(/^#/)
+      expect(theme.dark.qrPrimary).toMatch(/^#/)
+      expect(theme.swatch).toMatch(/^#/)
+    }
+  })
+
+  it('getInviteTheme returns the requested theme', () => {
+    expect(getInviteTheme('day').swatch).toBe(INVITE_THEMES.day.swatch)
+    expect(getInviteTheme('night').swatch).toBe(INVITE_THEMES.night.swatch)
+  })
+
+  it('getInviteTheme falls back to day for unknown keys', () => {
+    // @ts-expect-error testing runtime fallback
+    expect(getInviteTheme('mystery').swatch).toBe(INVITE_THEMES.day.swatch)
+  })
+})