new functions and fixes

src/tests/api_files.rs

@@ -7,7 +7,10 @@
  * See LICENSE file in repository root for details.
  */
 
-use super::{content_references_file, content_references_stored_file, is_safe_inline_image_mime};
+use super::{
+    content_references_file, content_references_stored_file, is_safe_inline_image_mime,
+    is_safe_inline_video_mime, parse_byte_range,
+};
 
 #[test]
 fn only_raster_images_are_inline() {
@@ -48,3 +51,30 @@ fn attachment_references_survive_origin_changes() {
         Some("https://new-files.example.com"),
     ));
 }
+
+#[test]
+fn common_video_formats_are_inline() {
+    assert!(is_safe_inline_video_mime("video/mp4"));
+    assert!(is_safe_inline_video_mime("video/webm"));
+    assert!(!is_safe_inline_video_mime("text/html"));
+    assert!(!is_safe_inline_video_mime("application/javascript"));
+}
+
+#[test]
+fn video_alias_is_still_attached() {
+    assert!(content_references_file(
+        "[video=clip.mp4,Product demo]",
+        "clip.mp4",
+        "/f/token/clip.mp4",
+    ));
+}
+
+#[test]
+fn byte_ranges_support_video_seeking() {
+    assert_eq!(parse_byte_range("bytes=0-99", 1_000), Ok(Some((0, 100))));
+    assert_eq!(parse_byte_range("bytes=500-", 1_000), Ok(Some((500, 1_000))));
+    assert_eq!(parse_byte_range("bytes=-100", 1_000), Ok(Some((900, 1_000))));
+    assert_eq!(parse_byte_range("bytes=900-2000", 1_000), Ok(Some((900, 1_000))));
+    assert_eq!(parse_byte_range("bytes=1000-", 1_000), Err(()));
+    assert_eq!(parse_byte_range("bytes=0-1,4-5", 1_000), Err(()));
+}