単体テストを追加

Cargo.toml

@@ -18,6 +18,7 @@ fs-err = { version = "2.9.0", features = ["tokio"] }
 itertools = "0.10.5"
 once_cell = "1.18.0"
 regex = "1.10.0"
+rstest = "0.15.0"
 serde = { version = "1.0.145", features = ["derive"] }
 serde_json = { version = "1.0.85", features = ["preserve_order"] }
 strum = { version = "0.24.1", features = ["derive"] }

crates/download/Cargo.toml

@@ -27,3 +27,6 @@ tracing.workspace = true
 tracing-subscriber.workspace = true
 url = "2.3.0"
 zip = "0.6.3"
+
+[dev-dependencies]
+rstest.workspace = true

crates/download/src/main.rs

@@ -662,3 +662,30 @@ enum Stripping {
     None,
     FirstDir,
 }
+
+#[cfg(test)]
+mod tests {
+    use clap::Parser as _;
+    use rstest::rstest;
+
+    use super::Args;
+
+    #[rstest]
+    #[case(&["", "--only", "core", "--exclude", "models"])]
+    #[case(&["", "--min", "--only", "core"])]
+    #[case(&["", "--min", "--exclude", "core"])]
+    fn it_denies_conflicting_options(#[case] args: &[&str]) {
+        let result = parse(args);
+        assert_eq!(Err(clap::error::ErrorKind::ArgumentConflict), result);
+    }
+
+    #[test]
+    fn it_denies_only_option_without_device_option() {
+        let result = parse(&["", "--only", "additional-libraries"]);
+        assert_eq!(Err(clap::error::ErrorKind::MissingRequiredArgument), result);
+    }
+
+    fn parse(args: &[&str]) -> Result<(), clap::error::ErrorKind> {
+        Args::try_parse_from(args).map(|_| ()).map_err(|e| e.kind())
+    }
+}

crates/voicevox_core/Cargo.toml

@@ -46,7 +46,7 @@ rev = "a16714ce16dec76fd0e3041a7acfa484921db3b5"
 flate2 = "1.0.24"
 heck = "0.4.0"
 pretty_assertions = "1.3.0"
-rstest = "0.15.0"
+rstest.workspace = true
 tar = "0.4.38"
 test_util.workspace = true