add to lower case to make asset loading case insensitive (#1427)

This should fix bug #1425

crates/bevy_asset/src/asset_server.rs

@@ -154,12 +154,13 @@ impl AssetServer {
  extensions: Vec::new(),
  })?
  .to_str()
+ .map(|s| s.to_lowercase())
  .ok_or(AssetServerError::MissingAssetLoader {
  extensions: Vec::new(),
  })?;
 
  let mut exts = Vec::new();
- let mut ext = s;
+ let mut ext = s.as_str();
  while let Some(idx) = ext.find('.') {
  ext = &ext[idx + 1..];
  exts.push(ext);
@@ -552,6 +553,13 @@ mod test {
  assert_eq!(t.unwrap().extensions()[0], "png");
  }
 
+ #[test]
+ fn case_insensitive_extensions() {
+ let asset_server = setup();
+ let t = asset_server.get_path_asset_loader("test.PNG");
+ assert_eq!(t.unwrap().extensions()[0], "png");
+ }
+
  #[test]
  fn no_loader() {
  let asset_server = setup();