feat: Add comprehensive unit tests for CLI and CertificateService, covering command parsing and certificate generation

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

@@ -61,3 +61,73 @@ pub async fn handle_sub_command(
         } => Ok(gen_agent_certs(settings, output, agent_id, zip).await?),
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use clap::Parser;
+
+    use super::{Cli, Commands};
+
+    #[test]
+    fn parses_serve_mode() {
+        let parsed = Cli::try_parse_from(["nxmesh-master", "--serve"]);
+        assert!(parsed.is_ok());
+        let parsed = parsed.unwrap_or_else(|_| unreachable!());
+
+        assert!(parsed.serve);
+        assert!(!parsed.generate_ca);
+        assert!(parsed.command.is_none());
+    }
+
+    #[test]
+    fn parses_generate_ca_flag() {
+        let parsed = Cli::try_parse_from(["nxmesh-master", "--generate-ca", "--serve"]);
+        assert!(parsed.is_ok());
+        let parsed = parsed.unwrap_or_else(|_| unreachable!());
+
+        assert!(parsed.generate_ca);
+        assert!(parsed.serve);
+    }
+
+    #[test]
+    fn parses_gen_certs_with_default_output() {
+        let parsed = Cli::try_parse_from(["nxmesh-master", "gen-certs"]);
+        assert!(parsed.is_ok());
+        let parsed = parsed.unwrap_or_else(|_| unreachable!());
+
+        match parsed.command {
+            Some(Commands::GenCerts { output }) => {
+                assert_eq!(output, "./certs");
+            }
+            _ => unreachable!(),
+        }
+    }
+
+    #[test]
+    fn parses_gen_agent_certs_with_custom_values() {
+        let parsed = Cli::try_parse_from([
+            "nxmesh-master",
+            "gen-agent-certs",
+            "--output",
+            "./out",
+            "--agent-id",
+            "agent-123",
+            "--zip",
+        ]);
+        assert!(parsed.is_ok());
+        let parsed = parsed.unwrap_or_else(|_| unreachable!());
+
+        match parsed.command {
+            Some(Commands::GenAgentCerts {
+                output,
+                agent_id,
+                zip,
+            }) => {
+                assert_eq!(output, "./out");
+                assert_eq!(agent_id, "agent-123");
+                assert!(zip);
+            }
+            _ => unreachable!(),
+        }
+    }
+}