test: add a test load configuration example for flownode (#6397)

* test: add a test load configuration example for flownode

Signed-off-by: liyang <daviderli614@gmail.com>

* format rust

Signed-off-by: liyang <daviderli614@gmail.com>

* fix cargo clippy

Signed-off-by: liyang <daviderli614@gmail.com>

* refine FlownodeOptions visibility

Signed-off-by: liyang <daviderli614@gmail.com>

* format rust

Signed-off-by: liyang <daviderli614@gmail.com>

---------

Signed-off-by: liyang <daviderli614@gmail.com>

src/flow/src/adapter.rs

@@ -95,7 +95,7 @@ impl Default for FlowConfig {
 }
 
 /// Options for flow node
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 #[serde(default)]
 pub struct FlownodeOptions {
     pub node_id: Option<u64>,
@@ -251,6 +251,10 @@ impl DiffRequest {
             Self::Delete(v) => v.len(),
         }
     }
+
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
 }
 
 pub fn batches_to_rows_req(batches: Vec<Batch>) -> Result<Vec<DiffRequest>, Error> {
@@ -929,6 +933,12 @@ pub struct FlowTickManager {
     start_timestamp: repr::Timestamp,
 }
 
+impl Default for FlowTickManager {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl FlowTickManager {
     pub fn new() -> Self {
         FlowTickManager {

src/flow/src/lib.rs

@@ -43,7 +43,7 @@ mod utils;
 #[cfg(test)]
 mod test_utils;
 
-pub use adapter::{FlowConfig, FlowStreamingEngineRef, FlownodeOptions, StreamingEngine};
+pub use adapter::{FlowConfig, FlowStreamingEngineRef, StreamingEngine};
 pub use batching_mode::frontend_client::{FrontendClient, GrpcQueryHandlerWithBoxedError};
 pub use engine::FlowAuthHeader;
 pub(crate) use engine::{CreateFlowArgs, FlowId, TableName};
@@ -52,3 +52,5 @@ pub use server::{
     get_flow_auth_options, FlownodeBuilder, FlownodeInstance, FlownodeServer,
     FlownodeServiceBuilder, FrontendInvoker,
 };
+
+pub use crate::adapter::FlownodeOptions;