Refactor test organization and update CI actions

.github/workflows/ci.yml

@@ -1,28 +1,41 @@
 name: Continuous integration
-on: [push, pull_request]
+on: [ push, pull_request ]
 
 env:
   RUSTFLAGS: "-Dwarnings"
   RUSTDOCFLAGS: "-Dwarnings"
 
 jobs:
   test:
+    name: Build and test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.89.0
-      - run: cargo build
-      - run: cargo test
+      - name: Check out
+        uses: actions/checkout@v6
+      - name: Set up Rust
+        uses: dtolnay/rust-toolchain@1.89.0
+      - name: Cache Cargo registry
+        uses: Swatinem/rust-cache@v2
+      - name: Build
+        run: cargo build
+      - name: Test
+        run: cargo test
 
   checks:
     name: Check clippy, formatting, and documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.89.0
+      - name: Check out
+        uses: actions/checkout@v6
+      - name: Set up Rust
+        uses: dtolnay/rust-toolchain@1.89.0
         with:
           components: clippy, rustfmt
-      - uses: Swatinem/rust-cache@v2
-      - run: cargo clippy --workspace --all-targets --all-features
-      - run: cargo fmt --check --all
-      - run: cargo doc --workspace --no-deps
+      - name: Cache Cargo registry
+        uses: Swatinem/rust-cache@v2
+      - name: Run clippy
+        run: cargo clippy --workspace --all-targets --all-features
+      - name: Check formatting
+        run: cargo fmt --check --all
+      - name: Build documentation
+        run: cargo doc --workspace --no-deps

bench/src/bench.rs

@@ -2,8 +2,8 @@ use criterion::{criterion_group, criterion_main, Criterion};
 
 use biblatex::Bibliography;
 
-const GRAL: &str = include_str!("../../tests/gral.bib");
-const CROSS: &str = include_str!("../../tests/cross.bib");
+const GRAL: &str = include_str!("../../tests/fixtures/valid/gral.bib");
+const CROSS: &str = include_str!("../../tests/fixtures/valid/cross.bib");
 
 fn benchmarks(c: &mut Criterion) {
     macro_rules! bench {