Add tests for speakerImageUrl function and improve mock image URL builder

Author: Starefossen

__tests__/lib/sanity/client.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from 'vitest'
+import { speakerImageUrl } from '@/lib/sanity/client'
+
+describe('speakerImageUrl', () => {
+  const sanityCdnUrl =
+    'https://cdn.sanity.io/images/testproject/production/abc123-200x200.jpg'
+  const githubAvatarUrl = 'https://avatars.githubusercontent.com/u/12345?v=4'
+  const linkedinAvatarUrl =
+    'https://media.licdn.com/dms/image/v2/abc123/profile-photo.jpg'
+
+  it('should transform Sanity CDN URLs through the image builder', () => {
+    const result = speakerImageUrl(sanityCdnUrl)
+
+    expect(result).toContain('cdn.sanity.io')
+  })
+
+  it('should return GitHub avatar URLs unchanged', () => {
+    expect(speakerImageUrl(githubAvatarUrl)).toBe(githubAvatarUrl)
+  })
+
+  it('should return LinkedIn avatar URLs unchanged', () => {
+    expect(speakerImageUrl(linkedinAvatarUrl)).toBe(linkedinAvatarUrl)
+  })
+
+  it('should not transform non-Sanity URLs even with custom options', () => {
+    const result = speakerImageUrl(githubAvatarUrl, {
+      width: 800,
+      height: 800,
+      fit: 'crop',
+    })
+
+    expect(result).toBe(githubAvatarUrl)
+  })
+
+  it('should not transform plain http URLs', () => {
+    const httpUrl = 'http://example.com/photo.jpg'
+    expect(speakerImageUrl(httpUrl)).toBe(httpUrl)
+  })
+})

__tests__/mocks/sanity-image-url.ts

@@ -1,7 +1,13 @@
 import { vi } from 'vitest'
 
-export const createImageUrlBuilder = vi.fn(() => ({
-  image: vi.fn(() => ({
-    url: vi.fn(() => 'https://example.com/image.png'),
-  })),
-}))
+function createChainableBuilder() {
+  const builder: Record<string, any> = {}
+  const chainMethods = ['image', 'width', 'height', 'fit', 'quality']
+  for (const method of chainMethods) {
+    builder[method] = vi.fn(() => builder)
+  }
+  builder.url = vi.fn(() => 'https://cdn.sanity.io/images/mock/image.png')
+  return builder
+}
+
+export const createImageUrlBuilder = vi.fn(() => createChainableBuilder())