chore: expose some codes to let other projects use them (#3102)

src/datanode/Cargo.toml

@@ -4,6 +4,9 @@ version.workspace = true
 edition.workspace = true
 license.workspace = true
 
+[features]
+testing = []
+
 [dependencies]
 api.workspace = true
 arrow-flight.workspace = true

src/datanode/src/lib.rs

@@ -24,5 +24,5 @@ pub mod heartbeat;
 pub mod metrics;
 pub mod region_server;
 mod store;
-#[cfg(test)]
-mod tests;
+#[cfg(any(test, feature = "testing"))]
+pub mod tests;

src/frontend/src/instance/standalone.rs

@@ -40,7 +40,7 @@ impl DatanodeManager for StandaloneDatanodeManager {
 }
 
 /// Relative to [client::region::RegionRequester]
-struct RegionInvoker {
+pub struct RegionInvoker {
     region_server: RegionServer,
 }
 

src/meta-srv/src/procedure.rs

@@ -16,4 +16,4 @@ pub mod region_failover;
 pub mod region_migration;
 #[cfg(test)]
 mod tests;
-mod utils;
+pub mod utils;

src/meta-srv/src/procedure/utils.rs

@@ -18,7 +18,7 @@ pub fn region_lock_key(table_id: TableId, region_number: RegionNumber) -> String
     format!("{}/region-{}", table_id, region_number)
 }
 
-#[cfg(test)]
+#[cfg(feature = "mock")]
 pub mod mock {
     use std::io::Error;
     use std::sync::Arc;