Extend test coverage for test and fixed modules

.justfile

@@ -82,7 +82,8 @@ test-cover-quick:
 # Quickly update coverage reports (inaccurate)
 [group: 'assess']
 test-cover-watch-quick:
-    {{ watch_cmd }} {{ just_cmd }} test-cover-quick
+    @{{ watch_cmd }} {{ just_cmd_no_ts }} test-cover-quick 2>&1 \
+        | grep -v "process didn't exit successfully:" || true
 
 alias oq := test-cover-watch-quick
 
@@ -441,9 +442,10 @@ glibc_target := "x86_64-unknown-linux-gnu"
 default_target := musl_target
 
 debug_vars := 'DEBUG=${DEBUG:-} DEBUG_FILTER=${DEBUG_FILTER:-} RUST_BACKTRACE=${RUST_BACKTRACE:-} RUSTFLAGS=${RUSTFLAGS:-}'
+just_cmd := 'just --timestamp --explain --command-color green'
+just_cmd_no_ts := 'just --explain --command-color green'
 watch_cmd := "watchexec -qc -r -e rs,toml,html --color always -- "
 cover_cmd := 'cargo llvm-cov --color always --ignore-filename-regex "main\.rs|log\.rs"'
-just_cmd := 'just --timestamp --explain --command-color green'
 
 last_tag := `git tag --sort=-creatordate | head -1 | tr -d v`
 manifest_version := `grep "^version" Cargo.toml | cut -d \" -f 2`

Cargo.lock

@@ -528,9 +528,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92ecc6618181def0457392ccd0ee51198e065e016d1d527a7ac1b6dc7c1f09d2"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
 
 [[package]]
 name = "js-sys"
@@ -1102,7 +1102,7 @@ dependencies = [
  "toml_datetime",
  "toml_parser",
  "toml_writer",
- "winnow",
+ "winnow 0.7.15",
 ]
 
 [[package]]
@@ -1116,18 +1116,18 @@ dependencies = [
 
 [[package]]
 name = "toml_parser"
-version = "1.0.9+spec-1.1.0"
+version = "1.0.10+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "702d4415e08923e7e1ef96cd5727c0dfed80b4d2fa25db9647fe5eb6f7c5a4c4"
+checksum = "7df25b4befd31c4816df190124375d5a20c6b6921e2cad937316de3fccd63420"
 dependencies = [
- "winnow",
+ "winnow 1.0.0",
 ]
 
 [[package]]
 name = "toml_writer"
-version = "1.0.6+spec-1.1.0"
+version = "1.0.7+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab16f14aed21ee8bfd8ec22513f7287cd4a91aa92e44edfe2c17ddd004e92607"
+checksum = "f17aaa1c6e3dc22b1da4b6bba97d066e354c7945cac2f7852d4e4e7ca7a6b56d"
 
 [[package]]
 name = "tower"
@@ -1475,19 +1475,25 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df79d97927682d2fd8adb29682d1140b343be4ac0f08fd68b7765d9c059d3945"
 
 [[package]]
-name = "zerocopy"
-version = "0.8.42"
+name = "winnow"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2578b716f8a7a858b7f02d5bd870c14bf4ddbbcf3a4c05414ba6503640505e3"
+checksum = "a90e88e4667264a994d34e6d1ab2d26d398dcdca8b7f52bec8668957517fc7d8"
+
+[[package]]
+name = "zerocopy"
+version = "0.8.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efbb2a062be311f2ba113ce66f697a4dc589f85e78a4aea276200804cea0ed87"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.42"
+version = "0.8.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e6cc098ea4d3bd6246687de65af3f920c430e236bee1e3bf2e441463f08a02f"
+checksum = "0e8bc7269b54418e7aeeef514aa68f8690b8c0489a06b0136e5f57c4c5ccab89"
 dependencies = [
  "proc-macro2",
  "quote",

Cargo.toml

@@ -268,5 +268,4 @@ zero_sized_map_values = "warn"
 # cargo
 negative_feature_names = "warn"
 redundant_feature_names = "warn"
-multiple_crate_versions = "warn"
 wildcard_dependencies = "warn"

src/dev/test.rs

@@ -2,9 +2,11 @@ use std::{env, fs, io, path::PathBuf};
 
 use crate::prelude::*;
 
+#[derive(Debug)]
 pub struct Directories {
     pub original: PathBuf,
     pub templates: PathBuf,
+    pub assets: PathBuf,
     pub test: PathBuf,
 }
 
@@ -20,6 +22,7 @@ impl Directories {
         let original = env::current_dir()?;
         let test = original.join(format!("target/mocks/{dir_name}"));
         let templates = test.join("templates");
+        let assets = test.join("static").join("public").join("assets");
 
         drop(fs::remove_dir_all(&test));
 
@@ -37,6 +40,13 @@ impl Directories {
             ))
         }
 
+        if let Err(error) = fs::create_dir_all(&assets) {
+            return Err(Error::with_io(
+                "Failed 'assets' directory creation",
+                error,
+            ))
+        }
+
         if let Err(error) = env::set_current_dir(&test) {
             return Err(Error::with_io("Failed current directory change", error))
         }
@@ -44,6 +54,7 @@ impl Directories {
         Ok(Directories {
             original,
             templates,
+            assets,
             test,
         })
     }
@@ -68,10 +79,10 @@ pub struct Error {
 }
 
 impl Error {
-    fn with_io(message: &str, inner_io: io::Error) -> Error {
+    fn with_io(message: &str, inner_error: io::Error) -> Error {
         Error {
             message: String::from(message),
-            inner_io: Some(inner_io),
+            inner_io: Some(inner_error),
             inner_tera: None,
         }
     }
@@ -132,4 +143,48 @@ mod tests {
         let dirs = Directories::setup("\0");
         assert!(dirs.is_err());
     }
+
+    #[test]
+    fn display_contains_str_from_from() {
+        let payload = "rHneusPkYNGW0Ia0";
+        let error = Error::from(payload);
+        assert!(format!("{error}").contains(payload));
+    }
+
+    #[test]
+    fn display_contains_str_from_io_error() {
+        let payload = "SsVi0d3Ywc8kVhwp";
+        let io_payload = "LoPbZP7cJEHzAjGW";
+        let io_error = std::io::Error::other(io_payload);
+        let error = Error::with_io(payload, io_error);
+        assert!(format!("{error}").contains(payload));
+        assert!(format!("{error}").contains(io_payload));
+    }
+
+    #[test]
+    fn from_io_error() {
+        let payload = "YgmTKBm3VtHt5h3x9";
+        let io_error = std::io::Error::other(payload);
+        let error = Error::from(io_error);
+
+        assert!(error.message.contains(payload));
+    }
+}
+
+#[cfg(test)]
+mod serial_tests {
+    use super::*;
+
+    #[test]
+    fn failed_working_directory_reset() {
+        let dirs = Directories::setup("\0");
+
+        let error = dirs.unwrap_err();
+        println!("{error}");
+        assert!(error.message.contains("Failed test's directory creation"));
+        assert!(
+            format!("{error}")
+                .contains("file name contained an unexpected NUL byte")
+        );
+    }
 }

src/router/handlers/fixed.rs

@@ -86,9 +86,9 @@ fn assemble(asset: Asset, graph: &Graph) -> Response<Body> {
     }
 }
 
-#[expect(clippy::upper_case_acronyms)]
 #[derive(Debug)]
-enum AssetErrorKind {
+#[expect(clippy::upper_case_acronyms)]
+pub enum AssetErrorKind {
     NotFound,
     IO,
     UTF8,
@@ -96,11 +96,11 @@ enum AssetErrorKind {
 }
 
 #[derive(Debug)]
-struct AssetError {
-    path: String,
-    kind: AssetErrorKind,
-    io_error: Option<std::io::Error>,
-    utf8_error: Option<FromUtf8Error>,
+pub struct AssetError {
+    pub path: String,
+    pub kind: AssetErrorKind,
+    pub io_error: Option<std::io::Error>,
+    pub utf8_error: Option<FromUtf8Error>,
 }
 
 impl AssetError {
@@ -136,8 +136,7 @@ impl std::fmt::Display for AssetError {
         let mut message = match self.kind {
             AssetErrorKind::IO => {
                 format!(
-                    "A default fallback for {} was found, \
-                    but it could not be loaded",
+                    "File {} was found, but it could not be loaded",
                     self.path
                 )
             },
@@ -170,6 +169,7 @@ impl std::fmt::Display for AssetError {
     }
 }
 
+#[derive(Debug)]
 struct Asset {
     blob: Option<Vec<u8>>,
     text: Option<String>,
@@ -224,13 +224,14 @@ fn fallback(path: &str, graph: &Graph) -> Result<Asset, AssetError> {
     let mime = mime::Mime::guess(path);
 
     match std::fs::read(&target) {
-        // A matching file exists on disk
+        // A matching file exists on disk and is accessible
         Ok(content) => Ok(Asset {
             blob: Some(content),
             text: None,
             mime,
         }),
         Err(io_error) => {
+            // A matching file does not exist on disk
             if io_error.kind() == ErrorKind::NotFound {
                 if let Some(content) = defaults.get(path) {
                     Ok(Asset::from_str(content, mime))
@@ -252,6 +253,7 @@ fn fallback(path: &str, graph: &Graph) -> Result<Asset, AssetError> {
                         None => not_found_error,
                     }
                 }
+            // A matching file exists on disk and is not accessible
             } else {
                 Err(AssetError::new(
                     path,
@@ -668,4 +670,99 @@ mod tests {
         let response = file(Path("/k/j/m".to_string()), State(state)).await;
         assert!(response.status() == StatusCode::NOT_FOUND);
     }
+
+    #[test]
+    fn error_from_utf8error() {
+        let bytes = vec![0, 159];
+        let utf8error = String::from_utf8(bytes.clone()).unwrap_err();
+        let error = AssetError::from(utf8error);
+        assert!(error.utf8_error.is_some());
+        assert_eq!(error.utf8_error.unwrap().into_bytes(), bytes);
+    }
+
+    #[test]
+    fn error_from_string() {
+        let payload = "r5MDnkEojW9HZDAG";
+        let asset_error = AssetError::from(payload.to_string());
+        println!("{asset_error}");
+        assert!(asset_error.path.contains(payload));
+    }
+
+    #[test]
+    fn new_text_asset() {
+        let asset = Asset::new(&[1, 0, 1], mime::Mime::Txt).unwrap();
+
+        assert!(asset.blob.is_none());
+        assert!(asset.text.is_some());
+        assert_eq!(asset.text.unwrap(), "\u{1}\0\u{1}");
+    }
+
+    #[test]
+    fn new_blob_asset() {
+        let asset = Asset::new(&[1, 0, 1], mime::Mime::Png).unwrap();
+
+        assert!(asset.blob.is_some());
+        assert!(asset.text.is_none());
+        assert_eq!(asset.blob.unwrap(), &[1, 0, 1]);
+    }
+
+    #[test]
+    fn asset_from_str() {
+        let payload = "\u{1}\0\u{6}";
+        let asset = Asset::from_str(payload, mime::Mime::Ico);
+        assert_eq!(asset.blob.unwrap(), &[1, 0, 6]);
+    }
+
+    #[test]
+    fn new_asset_utf8_error() {
+        let bad_bytes = [0xff, 0xc0, 0xf5, 0xc1, 0x80];
+
+        let error = Asset::new(&bad_bytes, mime::Mime::Txt).unwrap_err();
+
+        assert!(matches!(&error.kind, AssetErrorKind::UTF8));
+        assert!(format!("{error}").contains("UTF8 decoding error"));
+    }
+
+    #[test]
+    fn not_found_fallback_error() {
+        let error = fallback("not_found.png", &Graph::default()).unwrap_err();
+
+        assert!(matches!(&error.kind, AssetErrorKind::NotFound));
+        assert!(
+            format!("{error}")
+                .contains("The file was not found in the searched path")
+        );
+    }
+}
+
+#[cfg(test)]
+#[expect(clippy::panic_in_result_fn)]
+mod serial_tests {
+    use std::{fs, os::unix::fs::PermissionsExt as _};
+
+    use super::*;
+    use crate::dev::test::{Directories, Error};
+
+    #[test]
+    fn io_asset_error() -> Result<(), Error> {
+        let dirs = Directories::setup("io_asset_error")?;
+
+        let assets = dirs.assets.clone();
+        let file = assets.join("unreadable.png");
+
+        fs::write(&file, [1, 0, 1])?;
+        let mut permissions = fs::metadata(&file)?.permissions();
+        permissions.set_mode(0o200);
+        fs::set_permissions(&file, permissions)?;
+
+        let error = fallback("unreadable.png", &Graph::default()).unwrap_err();
+
+        assert!(matches!(&error.kind, AssetErrorKind::IO));
+        assert!(
+            format!("{error}")
+                .contains("was found, but it could not be loaded")
+        );
+
+        Ok(())
+    }
 }

src/syntax/content/parser/token/verse.rs

@@ -3,16 +3,10 @@ use crate::syntax::content::{Parseable, parser::Lexeme};
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub struct Verse {
     open: Option<bool>,
-    citation: Option<String>,
 }
 
 impl Verse {
-    pub const fn new(open: bool) -> Verse {
-        Verse {
-            open: Some(open),
-            citation: None,
-        }
-    }
+    pub const fn new(open: bool) -> Verse { Verse { open: Some(open) } }
 
     pub fn probe_end(lexeme: &Lexeme) -> bool {
         lexeme.match_char_triple('\n', '&', '\n')
@@ -24,12 +18,7 @@ impl Parseable for Verse {
         lexeme.match_char_triple('\n', '&', '\n')
     }
 
-    fn lex(_lexeme: &Lexeme) -> Verse {
-        Verse {
-            open: None,
-            citation: None,
-        }
-    }
+    fn lex(_lexeme: &Lexeme) -> Verse { Verse { open: None } }
 
     fn render(&self) -> String {
         if let Some(open) = self.open {
@@ -59,12 +48,44 @@ impl std::fmt::Display for Verse {
             None => "unknown",
         };
 
-        let citation = if self.citation.is_some() {
-            " cited"
-        } else {
-            ""
-        };
-
-        write!(f, "Verse [{display_open_state}{citation}]")
+        write!(f, "Verse [{display_open_state}]")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn lexed_verse_is_empty() {
+        let verse = Verse::lex(&Lexeme::default());
+        assert!(verse.open.is_none());
+    }
+
+    #[test]
+    fn flat_verse_is_empty() {
+        let verse = Verse::new(true);
+        assert!(verse.flatten().is_empty());
+    }
+
+    #[test]
+    #[should_panic(
+        expected = "Attempt to render a verse tag while open state is unknown"
+    )]
+    fn render_attempt_with_unknown_open_state() {
+        let verse = Verse::lex(&Lexeme::default());
+        verse.render();
+    }
+
+    #[test]
+    fn display() {
+        let open = Verse::new(true);
+        assert_eq!(format!("{open}"), "Verse [open]");
+
+        let closed = Verse::new(false);
+        assert_eq!(format!("{closed}"), "Verse [closed]");
+
+        let unknown = Verse::lex(&Lexeme::default());
+        assert_eq!(format!("{unknown}"), "Verse [unknown]");
     }
 }