feat: init

libraries/native_model/tests/example/example_main.rs

@@ -0,0 +1,70 @@
+use bincode;
+use bincode::{Decode, Encode};
+use native_model::native_model;
+
+fn native_model_encode_body<T: bincode::Encode>(
+    model: &T,
+) -> Result<Vec<u8>, bincode::error::EncodeError> {
+    {
+        bincode::encode_to_vec(model, bincode::config::standard())
+    }
+}
+
+fn native_model_decode_body<T: bincode::Decode>(
+    data: Vec<u8>,
+) -> Result<T, bincode::error::DecodeError> {
+    {
+        bincode::decode_from_slice(&data, bincode::config::standard()).map(|(result, _)| result)
+    }
+}
+
+#[derive(Encode, Decode, PartialEq, Debug)]
+#[native_model(id = 1, version = 1)]
+struct DotV1(u32, u32);
+
+#[derive(Encode, Decode, PartialEq, Debug)]
+#[native_model(id = 1, version = 2, from = DotV1)]
+struct DotV2 {
+    name: String,
+    x: u64,
+    y: u64,
+}
+
+impl From<DotV1> for DotV2 {
+    fn from(dot: DotV1) -> Self {
+        DotV2 {
+            name: "".to_string(),
+            x: dot.0 as u64,
+            y: dot.1 as u64,
+        }
+    }
+}
+
+impl From<DotV2> for DotV1 {
+    fn from(dot: DotV2) -> Self {
+        DotV1(dot.x as u32, dot.y as u32)
+    }
+}
+
+#[test]
+fn run_example() {
+    // Application 1
+    let dot = DotV1(1, 2);
+    let bytes = native_model::encode(&dot).unwrap();
+
+    // Application 1 sends bytes to Application 2.
+
+    // Application 2
+    let (mut dot, source_version) = native_model::decode::<DotV2>(bytes).unwrap();
+    // Use the struct DataV2 which has more fields and a different structure.
+    dot.name = "Dot".to_string();
+    dot.x = 5;
+    // Encode the dot with the application 1 version in order to be compatible with it.
+    let bytes = native_model::encode_downgrade(dot, source_version).unwrap();
+
+    // Application 2 sends bytes to Application 1.
+
+    // Application 1
+    let (dot, _) = native_model::decode::<DotV1>(bytes).unwrap();
+    assert_eq!(dot, DotV1(5, 2));
+}