fix: make cargo test pass with gdb feature

In CI we always run unittests without `--features gdb`, but actually
with the gdb feature they dont compile. Fix this with some cfgs.

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

src/firecracker/src/api_server/request/machine_configuration.rs

@@ -123,6 +123,8 @@ mod tests {
                 cpu_template: None,
                 track_dirty_pages: Some(false),
                 huge_pages: Some(expected),
+                #[cfg(feature = "gdb")]
+                gdb_socket_path: None,
             };
             assert_eq!(
                 vmm_action_from_request(parse_put_machine_config(&Body::new(body)).unwrap()),
@@ -142,6 +144,8 @@ mod tests {
             cpu_template: Some(StaticCpuTemplate::None),
             track_dirty_pages: Some(false),
             huge_pages: Some(HugePageConfig::None),
+            #[cfg(feature = "gdb")]
+            gdb_socket_path: None,
         };
         assert_eq!(
             vmm_action_from_request(parse_put_machine_config(&Body::new(body)).unwrap()),
@@ -161,6 +165,8 @@ mod tests {
             cpu_template: None,
             track_dirty_pages: Some(true),
             huge_pages: Some(HugePageConfig::None),
+            #[cfg(feature = "gdb")]
+            gdb_socket_path: None,
         };
         assert_eq!(
             vmm_action_from_request(parse_put_machine_config(&Body::new(body)).unwrap()),
@@ -184,6 +190,8 @@ mod tests {
                 cpu_template: Some(StaticCpuTemplate::T2),
                 track_dirty_pages: Some(true),
                 huge_pages: Some(HugePageConfig::None),
+                #[cfg(feature = "gdb")]
+                gdb_socket_path: None,
             };
             assert_eq!(
                 vmm_action_from_request(parse_put_machine_config(&Body::new(body)).unwrap()),
@@ -209,6 +217,8 @@ mod tests {
             cpu_template: None,
             track_dirty_pages: Some(true),
             huge_pages: Some(HugePageConfig::None),
+            #[cfg(feature = "gdb")]
+            gdb_socket_path: None,
         };
         assert_eq!(
             vmm_action_from_request(parse_put_machine_config(&Body::new(body)).unwrap()),

src/vmm/src/resources.rs

@@ -1328,6 +1328,8 @@ mod tests {
             cpu_template: Some(StaticCpuTemplate::V1N1),
             track_dirty_pages: Some(false),
             huge_pages: Some(HugePageConfig::None),
+            #[cfg(feature = "gdb")]
+            gdb_socket_path: None,
         };
 
         assert_ne!(