tests pass

src/config.rs

@@ -23,6 +23,11 @@ pub struct Stream {
 pub struct Engine {
    pub name: String,
    pub kafka: Option<Kafka>,
+   pub device: Option<Device>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Device {
 }
 
 #[derive(Serialize, Deserialize, Debug)]
@@ -58,12 +63,14 @@ fn build_config_std() -> Config {
             engine: Engine{
                name: String::from("stdin"),
                kafka: None,
+               device: None,
             },
          },
          output: Stream {
             engine: Engine{
                name: String::from("stdout"),
                kafka: None,
+               device: None,
             },
          },
       },

src/engine.rs

@@ -8,10 +8,25 @@ pub fn build_input_engine(cfg: &Engine) -> Result<Box<dyn InputEngine>, String>
    match cfg.name.as_str() {
       "stdin" => return Ok(Box::new(InputEngineStdin{})),
       "kafka" => return build_input_engine_kafka(&cfg),
+      "device" => return build_input_engine_device(&cfg),
       _ => return Err("unknown input engine name".to_string() + &cfg.name),
    }
 }
 
+struct InputEngineDevice {
+}
+
+pub fn build_input_engine_device(cfg: &Engine) -> Result<Box<dyn InputEngine>, String> {
+   let device_cfg = cfg.device.as_ref().unwrap();
+   return Err("do what".to_string());
+}
+
+impl InputEngine for InputEngineDevice {
+   fn get(&mut self) -> Vec<char> {
+      Err("end".to_string()).unwrap()
+   }
+}
+
 struct InputEngineKafka {
 }
 
@@ -50,11 +65,11 @@ mod test_input {
 
    #[test]
    fn test_input_engine_impl() {
-      let input_engine_test = InputEngineTest{};
-      _test_input_engine_impl(&input_engine_test);
+      let mut input_engine_test = InputEngineTest{};
+      _test_input_engine_impl(&mut input_engine_test);
    }
 
-   fn _test_input_engine_impl(engine: &dyn InputEngine) {
+   fn _test_input_engine_impl(engine: &mut dyn InputEngine) {
       assert_eq!("hello world".to_string(), engine.get().iter().cloned().collect::<String>());
    }
 }

src/testdata/config-device-to-stdout.yaml

@@ -0,0 +1,8 @@
+streams:
+  input:
+    engine:
+      name: device
+      device: {}
+  output:
+    engine:
+      name: stdout

src/testdata/config-kinesis-to-kafka.json

@@ -14,7 +14,9 @@
             "name": "kafka",
             "kafka": {
                "topic": "topic-name",
-               "consumer_group": "consumer-group-name"
+               "consumer_group": "consumer-group-name",
+               "addr": "",
+               "crt": ""
             }
          }
       }