dev: use cargo nextest

https://github.com/nextest-rs/nextest/discussions/1510

dev/docs/db-container.md

@@ -6,7 +6,7 @@
   - git
   - Node.js
   - pnpm
-  - Rust toolchain
+  - Rust toolchain and [cargo-nextest](https://nexte.st/)
 	- Python 3
 	- Perl
   - FFmpeg

dev/docs/local-installation.md

@@ -40,6 +40,14 @@ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 cargo --version
 ```
 
+### Cargo nextest
+
+Instructions can be found at [this page](https://nexte.st/book/pre-built-binaries).
+
+```sh
+curl -LsSf https://get.nexte.st/latest/linux | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
+```
+
 ### PostgreSQL and PGroonga
 
 Firefish requires PostgreSQL v12 or later. We recommend that you install v12.x for the same reason as Node.js.

package.json

@@ -28,7 +28,7 @@
 		"mocha": "pnpm --filter backend run mocha",
 		"test": "pnpm run test:ts && pnpm run test:rs",
 		"test:ts": "pnpm run mocha",
-		"test:rs": "cargo test",
+		"test:rs": "cargo test --doc && cargo nextest run",
 		"format": "pnpm run format:ts; pnpm run format:rs",
 		"format:ts": "pnpm -r --parallel run format",
 		"format:rs": "cargo fmt --all --",