町名が間違っている場合、クラッシュさせないようにした

src/parser.rs

@@ -27,7 +27,10 @@ pub async fn parse<T: Api>(api: T, input: &str) -> ParsedAddress {
         .await
         .unwrap();
     // 町名を特定
-    let (rest, town_name) = read_town(rest, city).unwrap();
+    let (rest, town_name) = match read_town(rest, city) {
+        None => return ParsedAddress::new(prefecture_name, city_name, "", rest),
+        Some(result) => result,
+    };
 
     ParsedAddress::new(prefecture_name, city_name, town_name, rest)
 }
@@ -79,6 +82,16 @@ mod parser_tests {
         assert_eq!(address.rest, "平束市桜ケ丘100-1".to_string());
     }
 
+    #[tokio::test]
+    async fn parse_mocked_fail_町名が間違っている場合() {
+        let api = ApiMock { should_fail: false };
+        let address = parse(api, "神奈川県平塚市新百合ヶ丘100-1").await;
+        assert_eq!(address.prefecture, "神奈川県".to_string());
+        assert_eq!(address.city, "平塚市".to_string());
+        assert_eq!(address.town, "".to_string());
+        assert_eq!(address.rest, "新百合ヶ丘100-1".to_string());
+    }
+
     wasm_bindgen_test_configure!(run_in_browser);
 
     #[wasm_bindgen_test]