make mvcc impl compile with new key module

Signed-off-by: Alex Chi <iskyzh@gmail.com>

mini-lsm/src/key.rs

@@ -2,6 +2,8 @@ use std::fmt::Debug;
 
 use bytes::Bytes;
 
+pub const TS_ENABLED: bool = false;
+
 pub struct Key<T: AsRef<[u8]>>(T);
 
 pub type KeySlice<'a> = Key<&'a [u8]>;

mini-lsm/src/tests/week1_day7.rs

@@ -1,7 +1,7 @@
 use tempfile::tempdir;
 
 use crate::{
-    key::KeySlice,
+    key::{KeySlice, TS_ENABLED},
     table::{bloom::Bloom, FileObject, SsTable, SsTableBuilder},
 };
 
@@ -75,9 +75,17 @@ fn test_task3_block_key_compression() {
     let dir = tempdir().unwrap();
     let path = dir.path().join("1.sst");
     let sst = builder.build_for_test(path).unwrap();
-    assert!(
-        sst.block_meta.len() <= 25,
-        "you have {} blocks, expect 25",
-        sst.block_meta.len()
-    );
+    if TS_ENABLED {
+        assert!(
+            sst.block_meta.len() <= 34,
+            "you have {} blocks, expect 34",
+            sst.block_meta.len()
+        );
+    } else {
+        assert!(
+            sst.block_meta.len() <= 25,
+            "you have {} blocks, expect 25",
+            sst.block_meta.len()
+        );
+    }
 }