Fix bug

Author: camelid

ci/date-check/src/main.rs

@@ -20,11 +20,11 @@ impl Date {
         let self_chrono = Utc.ymd(self.year.try_into().unwrap(), self.month, 1);
         let other_chrono = Utc.ymd(other.year.try_into().unwrap(), other.month, 1);
         let duration_since = self_chrono.signed_duration_since(other_chrono);
-        let days_since = duration_since.num_days();
-        if days_since < 0 {
+        let months_since = duration_since.num_days() / 30;
+        if months_since < 0 {
             None
         } else {
-            Some(days_since.try_into().unwrap())
+            Some(months_since.try_into().unwrap())
         }
     }
 }
@@ -165,6 +165,13 @@ fn main() {
 mod tests {
     use super::*;
 
+    #[test]
+    fn test_months_since() {
+        let date1 = Date { year: 2020, month: 3 };
+        let date2 = Date { year: 2021, month: 1 };
+        assert_eq!(date2.months_since(date1), Some(10));
+    }
+
     #[test]
     fn test_date_regex() {
         let regex = make_date_regex();