rust/pv*: Unit test flag parsing

Add a unit test for flag parsing.

In order to ease this test, add derive Eq to ControlFlags and
Msb0Flags64. For the same test, add derive Default to
CreateBootImageArgs and the structs used in it. The latter can be
limited to only derive when testing to avoid confusion with any
user-level default.

Acked-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jakob Naucke <naucke@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

rust/pvimg/src/cmd/create.rs

@@ -213,3 +213,25 @@ pub fn create(opt: &CreateBootImageArgs) -> Result<OwnExitCode> {
     warn!("Successfully generated the Secure Execution image.");
     Ok(OwnExitCode::Success)
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::cli::CreateBootImageLegacyFlags;
+
+    #[test]
+    fn parse_flags() {
+        let args = CreateBootImageArgs {
+            legacy_flags: CreateBootImageLegacyFlags {
+                enable_dump: Some(true),
+                ..Default::default()
+            },
+            ..Default::default()
+        };
+        let parsed_flags = super::parse_flags(&args).expect("Failed to parse flags {args:?}");
+        let mut exp_flags = Vec::from(PlaintextControlFlagsV1::PCKMO);
+        exp_flags.push(PcfV1::AllowDumping);
+        let pcf = PlaintextControlFlagsV1::from_flags(PcfV1::all_enabled(exp_flags));
+        assert_eq!(parsed_flags.0, pcf);
+    }
+}