test: add dx rating calculate check

music_db/Cargo.toml

@@ -15,4 +15,5 @@ serde_json = { workspace = true }
 spdlog-rs = { workspace = true, optional = true }
 
 [features]
+default = ["log"]
 log = ["dep:spdlog-rs"]

music_db/src/lib.rs

@@ -1,4 +1,4 @@
-use std::{fs::OpenOptions, io::BufReader, sync::LazyLock};
+use std::sync::LazyLock;
 
 use rust_decimal::{Decimal, dec, serde::DecimalFromString};
 use rustc_hash::FxHashMap;
@@ -41,18 +41,7 @@ pub fn query_music_level(music_id: u32, level: u32) -> Option<&'static Level> {
 }
 
 pub static MUSIC_DB: LazyLock<Option<MusicDB>> = LazyLock::new(|| {
-    let json = OpenOptions::new()
-        .read(true)
-        .create(false)
-        .open("musicDB.json")
-        .inspect_err(|_e| {
-            #[cfg(feature = "log")]
-            spdlog::warn!("failed to load musicDB: {_e}")
-        })
-        .ok()?;
-    let buf_reader = BufReader::new(json);
-
-    let db: Vec<MusicInfo> = serde_json::from_reader(buf_reader)
+    let db: Vec<MusicInfo> = serde_json::from_slice(include_bytes!("musicDB.json"))
         .inspect_err(|_e| {
             #[cfg(feature = "log")]
             spdlog::warn!("failed to load musicDB: {_e}")
@@ -78,8 +67,11 @@ impl Level {
         let difficulty_rank: Decimal = self.difficulty.value;
         let achievement = Decimal::new(achievement as _, 4);
 
+        #[cfg(feature = "log")]
+        spdlog::info!("factor: {factor}, achievement: {achievement}");
+
         // when ach > 100.5%, calculate as 100.5%
-        let rating: u32 = (factor * difficulty_rank * achievement.min(dec!(100.5)))
+        let rating: u32 = (factor * difficulty_rank * achievement)
             .floor()
             .try_into()
             .unwrap_or_default();
@@ -112,3 +104,14 @@ const RANKS: [(&'static str, i32, Decimal); 23] = [
     ("SSS", 1004999, dec!(0.222)),
     ("SSS+", 1005000, dec!(0.224)),
 ];
+
+#[cfg(test)]
+mod tests {
+    use crate::query_music_level;
+
+    #[test]
+    fn test_rating_calculate() {
+        let level = query_music_level(11696, 3).expect("not found");
+        assert_eq!(level.dx_rating(953184), ("AAA", 184));
+    }
+}