test(cli): add tests for argument parsing

Signed-off-by: Changyuan Lyu <changyuanl@google.com>

Author: Lencerf

Cargo.lock

@@ -30,6 +30,7 @@ syn = { version = "2", features = ["full"] }
 quote = { version = "1" }
 rstest = "0.26"
 tempfile = "3"
+pretty_assertions = "1"
 
 [profile.release]
 lto = true

Cargo.toml

@@ -20,3 +20,9 @@ serde-aco.workspace = true
 [[bin]]
 path = "src/main.rs"
 name = "alioth"
+
+[dev-dependencies]
+assert_matches.workspace = true
+ctor.workspace = true
+rstest.workspace = true
+pretty_assertions.workspace = true

alioth-cli/Cargo.toml

@@ -64,7 +64,7 @@ pub enum Error {
     WaitVm { source: alioth::vm::Error },
 }
 
-#[derive(Args, Debug, Clone)]
+#[derive(Args, Debug, Clone, Default)]
 #[command(arg_required_else_help = true, alias("run"))]
 pub struct BootArgs {
     #[arg(long, help(
@@ -362,3 +362,7 @@ pub fn boot(mut args: BootArgs) -> Result<(), Error> {
     vm.wait().context(error::WaitVm)?;
     Ok(())
 }
+
+#[cfg(test)]
+#[path = "boot_test.rs"]
+mod tests;