102 lines
2.7 KiB
Rust
102 lines
2.7 KiB
Rust
use chusql_core_storage::protocol::Row;
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use chusql_core_storage::wal::{Wal, WalOp};
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use serde_json::json;
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// WAL 测试：追加、读取、清空、截断尾巴。
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/// 用键值对构造一行
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fn row(pairs: &[(&str, serde_json::Value)]) -> Row {
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let mut m = Row::new();
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for (k, v) in pairs {
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m.insert((*k).to_string(), v.clone());
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}
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m
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}
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/// 三种操作写完都能原样读回
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#[test]
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fn append_and_read_round_trips() {
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let dir = tempfile::tempdir().unwrap();
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let wal = Wal::new(dir.path().join("wal.log"));
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let ops = [
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WalOp::Insert {
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table: "users".into(),
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row: row(&[("id", json!(1)), ("name", json!("Alice"))]),
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},
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WalOp::ReplaceAll {
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table: "users".into(),
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rows: vec![
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row(&[("id", json!(1)), ("name", json!("Alice"))]),
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row(&[("id", json!(2)), ("name", json!("Bob"))]),
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],
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},
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WalOp::DropColumn {
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table: "users".into(),
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column: "age".into(),
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rows: vec![
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row(&[("id", json!(1)), ("name", json!("Alice"))]),
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row(&[("id", json!(2)), ("name", json!("Bob"))]),
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],
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},
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];
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for op in ops {
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wal.clear().unwrap();
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wal.append(&op).unwrap();
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assert_eq!(wal.read().unwrap().unwrap(), op);
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}
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}
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/// 文件不存在或为空都返回 None
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#[test]
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fn read_without_content_returns_none() {
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let dir = tempfile::tempdir().unwrap();
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let missing = Wal::new(dir.path().join("missing.log"));
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assert!(missing.read().unwrap().is_none());
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let path = dir.path().join("wal.log");
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std::fs::write(&path, b"").unwrap();
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let empty = Wal::new(&path);
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assert!(empty.read().unwrap().is_none());
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}
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/// 清空后读不到
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#[test]
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fn clear_truncates() {
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let dir = tempfile::tempdir().unwrap();
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let path = dir.path().join("wal.log");
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let wal = Wal::new(&path);
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wal.append(&WalOp::Insert {
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table: "t".into(),
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row: row(&[("id", json!(1))]),
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})
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.unwrap();
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assert!(wal.read().unwrap().is_some());
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wal.clear().unwrap();
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assert!(wal.read().unwrap().is_none());
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assert_eq!(std::fs::metadata(&path).unwrap().len(), 0);
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}
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/// 尾巴截断被忽略
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#[test]
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fn truncated_tail_is_ignored() {
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let dir = tempfile::tempdir().unwrap();
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let path = dir.path().join("wal.log");
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let wal = Wal::new(&path);
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wal.append(&WalOp::Insert {
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table: "users".into(),
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row: row(&[("id", json!(1)), ("name", json!("Alice"))]),
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})
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.unwrap();
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let full = std::fs::read(&path).unwrap();
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std::fs::write(&path, &full[..full.len() - 5]).unwrap();
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assert!(wal.read().unwrap().is_none());
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}
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