rust部分推进：进程间通信（Windows平台命名管线）、内存页表、B+树、WAL恢复系统、动态配置

chusql-storage/tests/catalog_test.rs

@@ -0,0 +1,59 @@
+use chusql_storage::catalog::Catalog;
+use chusql_storage::protocol::{ColumnType, Row};
+use serde_json::json;
+
+fn row(pairs: &[(&str, serde_json::Value)]) -> Row {
+    let mut m = Row::new();
+    for (k, v) in pairs {
+        m.insert((*k).to_string(), v.clone());
+    }
+    m
+}
+
+#[test]
+fn empty_file_gives_empty_catalog() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = dir.path().join("catalog.json");
+    let c = Catalog::load(&path).unwrap();
+    assert_eq!(c.table_names().len(), 0);
+}
+
+#[test]
+fn ensure_then_describe() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = dir.path().join("catalog.json");
+
+    let mut c = Catalog::load(&path).unwrap();
+    c.ensure_columns("users", &row(&[("id", json!(1)), ("name", json!("Alice"))]));
+    c.save(&path).unwrap();
+
+    let c2 = Catalog::load(&path).unwrap();
+    let s = c2.describe("users").unwrap();
+    assert_eq!(s.columns.len(), 2);
+    let names: Vec<&str> = s.columns.iter().map(|c| c.name.as_str()).collect();
+    assert!(names.contains(&"id"));
+    assert!(names.contains(&"name"));
+    let id_col = s.columns.iter().find(|c| c.name == "id").unwrap();
+    assert_eq!(id_col.ty, ColumnType::Int);
+    let name_col = s.columns.iter().find(|c| c.name == "name").unwrap();
+    assert_eq!(name_col.ty, ColumnType::Str);
+}
+
+#[test]
+fn second_insert_does_not_duplicate_columns() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = dir.path().join("catalog.json");
+
+    let mut c = Catalog::load(&path).unwrap();
+    c.ensure_columns("users", &row(&[("id", json!(1))]));
+    c.ensure_columns("users", &row(&[("id", json!(2))]));
+    assert_eq!(c.describe("users").unwrap().columns.len(), 1);
+}
+
+#[test]
+fn describe_unknown_returns_none() {
+    let dir = tempfile::tempdir().unwrap();
+    let path = dir.path().join("catalog.json");
+    let c = Catalog::load(&path).unwrap();
+    assert!(c.describe("nope").is_none());
+}