fix: normalize pokemon lookup names

src/clients/pokeapi.rs

@@ -25,7 +25,11 @@ impl PokeApiClient {
     #[instrument(skip(self), fields(pokemon.name = %name))]
     pub async fn get_pokemon_info(&self, name: &str) -> Result<PokemonInfo, AppError> {
         validate_pokemon_name(name)?;
-        let url = format!("{}/pokemon-species/{}", self.base_url, name);
+        let url = format!(
+            "{}/pokemon-species/{}",
+            self.base_url,
+            name.to_ascii_lowercase()
+        );
         let response = self
             .http
             .get(url)
@@ -176,6 +180,32 @@ mod tests {
         assert!(pokemon.is_legendary);
     }
 
+    #[tokio::test]
+    async fn normalizes_pokemon_names_to_pokeapi_identifiers() {
+        let server = MockServer::start().await;
+        Mock::given(matchers::method("GET"))
+            .and(matchers::path("/pokemon-species/mewtwo"))
+            .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
+                "name": "mewtwo",
+                "is_legendary": true,
+                "habitat": { "name": "rare" },
+                "flavor_text_entries": [
+                    { "flavor_text": "Created by science.", "language": { "name": "en" } }
+                ]
+            })))
+            .expect(1)
+            .mount(&server)
+            .await;
+        let client = client_for(&server);
+
+        let pokemon = client
+            .get_pokemon_info("Mewtwo")
+            .await
+            .expect("mixed-case pokemon names should resolve");
+
+        assert_eq!(pokemon.name, "mewtwo");
+    }
+
     #[tokio::test]
     async fn uses_unknown_habitat_when_pokeapi_has_no_habitat() {
         let server = MockServer::start().await;