Add serialisation test for Strategy

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

Cargo.lock

@@ -425,6 +425,7 @@ dependencies = [
  "once_cell",
  "semver",
  "serde",
+ "serde_json",
  "strum",
  "strum_macros",
  "url",

crates/binstalk-types/Cargo.toml

@@ -18,3 +18,6 @@ serde = { version = "1.0.163", features = ["derive"] }
 strum = "0.26.1"
 strum_macros = "0.26.1"
 url = { version = "2.3.1", features = ["serde"] }
+
+[dev-dependencies]
+serde_json = "1"

crates/binstalk-types/src/cargo_toml_binstall.rs

@@ -177,3 +177,20 @@ pub enum SigningAlgorithm {
     /// [minisign](https://jedisct1.github.io/minisign/)
     Minisign,
 }
+
+#[cfg(test)]
+mod tests {
+    use strum::VariantArray;
+
+    use super::*;
+
+    #[test]
+    fn test_strategy_ser() {
+        Strategy::VARIANTS.iter().for_each(|strategy| {
+            assert_eq!(
+                serde_json::to_string(&strategy).unwrap(),
+                format!(r#""{}""#, strategy.to_str())
+            )
+        });
+    }
+}