[ISSUE #397]✅Add test case for MessageSysFlag💡 (#398)

Author: Mark32-ship

rocketmq-common/src/common/sys_flag/message_sys_flag.rs

@@ -41,3 +41,58 @@ impl MessageSysFlag {
         (flag & expected_flag) != 0
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn get_transaction_value_returns_correct_value() {
+        let flag = MessageSysFlag::TRANSACTION_COMMIT_TYPE;
+        assert_eq!(
+            MessageSysFlag::get_transaction_value(flag),
+            MessageSysFlag::TRANSACTION_COMMIT_TYPE
+        );
+    }
+
+    #[test]
+    fn reset_transaction_value_resets_correctly() {
+        let flag = MessageSysFlag::TRANSACTION_COMMIT_TYPE;
+        let new_flag = MessageSysFlag::reset_transaction_value(
+            flag,
+            MessageSysFlag::TRANSACTION_ROLLBACK_TYPE,
+        );
+        assert_eq!(new_flag, MessageSysFlag::TRANSACTION_ROLLBACK_TYPE);
+    }
+
+    #[test]
+    fn clear_compressed_flag_clears_correctly() {
+        let flag = MessageSysFlag::COMPRESSED_FLAG;
+        let new_flag = MessageSysFlag::clear_compressed_flag(flag);
+        assert_eq!(new_flag, 0);
+    }
+
+    #[test]
+    fn get_compression_type_returns_correct_type() {
+        let flag = MessageSysFlag::COMPRESSION_LZ4_TYPE;
+        assert_eq!(
+            MessageSysFlag::get_compression_type(flag),
+            CompressionType::LZ4
+        );
+    }
+
+    #[test]
+    fn check_returns_true_when_flag_is_set() {
+        let flag = MessageSysFlag::COMPRESSED_FLAG;
+        assert!(MessageSysFlag::check(flag, MessageSysFlag::COMPRESSED_FLAG));
+    }
+
+    #[test]
+    fn check_returns_false_when_flag_is_not_set() {
+        let flag = 0;
+        assert!(!MessageSysFlag::check(
+            flag,
+            MessageSysFlag::COMPRESSED_FLAG
+        ));
+    }
+}