test: add stub lookupFontURL function

Author: danielroe

test/parse.test.ts

@@ -111,6 +111,7 @@ describe('error handling', () => {
   it('handles no font details supplied', async () => {
     const plugin = FontFamilyInjectionPlugin({
       dev: true,
+      lookupFontURL: () => undefined,
       resolveFontFace: () => ({ fonts: [] })
     }).raw({}, { framework: 'vite' }) as any
     expect(await plugin.transform(`:root { font-family: 'Poppins', 'Arial', sans-serif }`).then((r: any) => r?.code)).toMatchInlineSnapshot(`undefined`)
@@ -121,6 +122,7 @@ const slugify = (str: string) => str.toLowerCase().replace(/[^\d\w]/g, '-')
 async function transform (css: string) {
   const plugin = FontFamilyInjectionPlugin({
     dev: true,
+    lookupFontURL: () => undefined,
     resolveFontFace: (family, options) => ({
       fonts: [{ src: [{ url: `/${slugify(family)}.woff2`, format: 'woff2' }] }],
       fallbacks: options?.fallbacks ? ['Times New Roman', ...options.fallbacks] : undefined