test: add resiliency test case

Signed-off-by: mikeee <hey@mike.ee>

Cargo.toml

@@ -90,6 +90,10 @@ path = "examples/query_state/query1.rs"
 name = "query_state_q2"
 path = "examples/query_state/query2.rs"
 
+[[example]]
+name = "resiliency"
+path = "examples/resiliency/main.rs"
+
 [[example]]
 name = "secrets-bulk"
 path = "examples/secrets-bulk/app.rs"

examples/resiliency/README.md

@@ -0,0 +1,98 @@
+This example validates the resiliency and does not demonstrate any extra
+functionality. It is based off the configuration example to connect to the
+sidecar and make a call for a configuration item stored in redis.
+
+1. Insert a key with the value `hello` to redis using the following command:
+
+
+<!-- STEP
+name: Insert test configuration item
+output_match_mode: substring
+expected_stdout_lines:
+  - 'OK'
+background: false
+sleep: 5
+timeout_seconds: 5
+-->
+
+```bash
+docker exec dapr_redis redis-cli MSET hello "world"
+```
+
+<!-- END_STEP -->
+
+2. Run the example without the sidecar using the following command:
+
+<!-- STEP
+name: Run configuration app (expecting a fail)
+env:
+  DAPR_GRPC_PORT: "3500"
+  DAPR_API_MAX_RETRIES: "10"
+  DAPR_API_TIMEOUT_MILLISECONDS: "10000"
+output_match_mode: substring
+expected_stdout_lines:
+  - ''
+expected_stderr_lines:
+  - 'TransportError'
+expected_return_code: 101
+background: false
+sleep: 30
+timeout_seconds: 30
+-->
+
+```bash
+cargo run --example resiliency
+```
+
+<!-- END_STEP -->
+
+The result should be that the request will fail.
+
+3. Run the example without the sidecar (this time in the background)
+
+<!-- STEP
+name: Run configuration app (expecting a success eventually)
+env:
+  DAPR_GRPC_PORT: "3500"
+  DAPR_API_MAX_RETRIES: "10"
+  DAPR_API_TIMEOUT_MILLISECONDS: "10000"
+output_match_mode: substring
+expected_stdout_lines:
+  - '== APP == Configuration value: ConfigurationItem { value: "world"'
+background: true
+sleep: 30
+timeout_seconds: 30
+-->
+
+```bash
+cargo run --example resiliency
+```
+
+<!-- END_STEP -->
+
+
+
+4. Run the Dapr sidecar
+
+<!-- STEP
+name: Run Dapr sidecar
+output_match_mode: substring
+expected_stdout_lines:
+  - ''
+background: true
+sleep: 10
+timeout_seconds: 10
+-->
+
+```bash
+dapr run --app-id=rustapp --resources-path ../components --dapr-grpc-port 3500
+```
+
+<!-- END_STEP -->
+
+The example app should make contact with the Dapr sidecar and the result should
+be returned from the configuration request successfully.
+
+```
+Configuration value: ConfigurationItem { value: "world", version: "", metadata: {} }
+```

examples/resiliency/main.rs

@@ -0,0 +1,31 @@
+const CONFIGSTORE_NAME: &str = "configstore";
+type DaprClient = dapr::Client<dapr::client::TonicClient>;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Set the Dapr address
+    let addr = "https://127.0.0.1".to_string();
+
+    // Create the client
+    let mut client = match DaprClient::connect(addr).await {
+        Ok(client) => {
+            println!("connected to dapr sidecar");
+            client
+        }
+        Err(error) => {
+            panic!("failed to connect to dapr sidecar: {:?}", error)
+        }
+    };
+    println!("debug");
+
+    let key = String::from("hello");
+
+    // get key-value pair in the state store
+    let response = client
+        .get_configuration(CONFIGSTORE_NAME, vec![(&key)], None)
+        .await?;
+    let val = response.items.get("hello").unwrap();
+    println!("Configuration value: {val:?}");
+
+    Ok(())
+}