JsJson implementation for unit type

Author: sfisol

.github/workflows/pipeline.yaml

@@ -52,7 +52,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly-2024-02-28
+          toolchain: nightly-2024-07-01
           target: wasm32-unknown-unknown
           components: clippy
           override: true
@@ -74,7 +74,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly-2024-02-28
+          toolchain: nightly-2024-07-01
           target: wasm32-unknown-unknown
           components: clippy
           override: true
@@ -85,7 +85,7 @@ jobs:
       - name: vertigo-cli
         run: |
           cargo build --release -p vertigo-cli
-          rustup default nightly-2024-02-28
+          rustup default nightly-2024-07-01
           mkdir ../vertigo-cli-test
           mv target/release/vertigo ../vertigo-cli-test
           cd ../vertigo-cli-test

CHANGES.md

@@ -8,6 +8,7 @@
 * `Reactive` trait that allows generic components to be more flexible with props
 * `BTreeMap` and `chrono::DateTime<Utc>` support in `AutoJsJson`
 * `#[js_json(default = "None")]` attribute to `AutoJsJson`
+* `JsJson` implementation for unit type `()`
 * All http methods in `FetchMethod`
 * `history_replace` method in `Driver`
 * vertigo-cli: `add-watch-path` to `watch` command

crates/vertigo/src/driver_module/js_value/serialize.rs

@@ -171,6 +171,25 @@ impl JsJsonDeserialize for bool {
     }
 }
 
+impl JsJsonSerialize for () {
+    fn to_json(self) -> JsJson {
+        JsJson::Object(HashMap::default())
+    }
+}
+
+impl JsJsonDeserialize for () {
+    fn from_json(context: JsJsonContext, json: JsJson) -> Result<Self, JsJsonContext> {
+        let map = json.get_hashmap(&context)?;
+
+        if !map.is_empty() {
+            let message = "Empty {} expected, inner content received".to_string();
+            return Err(context.add(message))
+        }
+
+        Ok(())
+    }
+}
+
 impl JsJsonSerialize for &str {
     fn to_json(self) -> JsJson {
         JsJson::String(self.into())
@@ -384,4 +403,17 @@ mod tests {
 
         assert_eq!(ccc, eee);
     }
+
+    #[test]
+    fn test_unit() {
+        let unit = JsJson::Object(HashMap::default());
+
+        let Ok(()) = from_json::<()>(unit.clone()) else {
+            unreachable!();
+        };
+
+        let unit2 = to_json(());
+
+        assert_eq!(unit2, unit)
+    }
 }