feat: Add unit tests for CLI and MasterConnector, including certificate extraction and validation

apps/nxmesh-agent/src/cli/mod.rs

@@ -79,3 +79,84 @@ pub enum Commands {
         ca_cert: Option<String>,
     },
 }
+
+#[cfg(test)]
+mod tests {
+    use clap::Parser;
+
+    use super::{Cli, Commands};
+
+    #[test]
+    fn parses_serve_flag_without_subcommand() {
+        let parsed = Cli::try_parse_from(["nxmesh-agent", "--serve"]);
+        assert!(parsed.is_ok());
+
+        let parsed = parsed.ok();
+        assert!(parsed.is_some());
+        let parsed = parsed.unwrap_or_else(|| unreachable!());
+
+        assert!(parsed.serve);
+        assert!(parsed.command.is_none());
+    }
+
+    #[test]
+    fn parses_import_certs_with_zip_defaults() {
+        let parsed = Cli::try_parse_from(["nxmesh-agent", "import-certs", "bundle.zip"]);
+        assert!(parsed.is_ok());
+
+        let parsed = parsed.ok();
+        assert!(parsed.is_some());
+        let parsed = parsed.unwrap_or_else(|| unreachable!());
+
+        match parsed.command {
+            Some(Commands::ImportCerts {
+                zip,
+                cert_name,
+                key_name,
+                ca_name,
+                cert,
+                key,
+                ca_cert,
+            }) => {
+                assert_eq!(zip.as_deref(), Some("bundle.zip"));
+                assert_eq!(cert_name.as_deref(), Some("cert.pem"));
+                assert_eq!(key_name.as_deref(), Some("key.pem"));
+                assert_eq!(ca_name.as_deref(), Some("ca.pem"));
+                assert!(cert.is_none());
+                assert!(key.is_none());
+                assert!(ca_cert.is_none());
+            }
+            _ => unreachable!(),
+        }
+    }
+
+    #[test]
+    fn rejects_import_certs_with_separate_files() {
+        let parsed = Cli::try_parse_from([
+            "nxmesh-agent",
+            "import-certs",
+            "--cert",
+            "agent.crt",
+            "--key",
+            "agent.key",
+            "--ca-cert",
+            "ca.crt",
+        ]);
+        assert!(parsed.is_err());
+    }
+
+    #[test]
+    fn rejects_conflicting_zip_and_separate_inputs() {
+        let parsed = Cli::try_parse_from([
+            "nxmesh-agent",
+            "import-certs",
+            "bundle.zip",
+            "--cert",
+            "agent.crt",
+            "--key",
+            "agent.key",
+        ]);
+
+        assert!(parsed.is_err());
+    }
+}