Goal

Add unit tests for two pure functions in api/src/media.rs:

• ext_from_mime() (line 66) - maps MIME types to file extensions
• filename_from_url() (line 418) - extracts filename from a URL

File to edit

api/src/media.rs

How to run

cd api && cargo test media

Sub-issues (pick one)

ext_from_mime()

• test: ext_from_mime("image/jpeg") returns "jpg" #59 test: ext_from_mime("image/jpeg") returns "jpg"
• test: ext_from_mime("image/png") returns "png" #60 test: ext_from_mime("image/png") returns "png"
• test: ext_from_mime("image/gif") returns "gif" #61 test: ext_from_mime("image/gif") returns "gif"
• test: ext_from_mime("image/webp") returns "webp" #62 test: ext_from_mime("image/webp") returns "webp"
• test: ext_from_mime("image/svg+xml") returns "svg" #63 test: ext_from_mime("image/svg+xml") returns "svg"
• test: ext_from_mime("video/mp4") returns "mp4" #64 test: ext_from_mime("video/mp4") returns "mp4"
• test: ext_from_mime("application/pdf") returns "pdf" #65 test: ext_from_mime("application/pdf") returns "pdf"
• test: ext_from_mime unknown type like "application/x-custom" returns "bin" #66 test: ext_from_mime unknown type returns "bin"

filename_from_url()

• test: filename_from_url simple URL like "https://example.com/photo.jpg" returns "photo.jpg" #67 test: filename_from_url simple URL returns filename
• test: filename_from_url URL with query string strips params #68 test: filename_from_url with query string strips params
• test: filename_from_url URL without filename returns "untitled" #69 test: filename_from_url without filename returns "untitled"