Function test_preloading

src/cache/lazy_schema_loader.rs:332–359

()

    
    #[test]
    fn test_preloading() {
        let conn = Connection::open_in_memory().unwrap();
        
        // Create test tables
        conn.execute("CREATE TABLE table1 (id INTEGER)", []).unwrap();
        conn.execute("CREATE TABLE table2 (id INTEGER)", []).unwrap();
        
        let loader = LazySchemaLoader::new(300);
        
        // First, load schemas individually to generate cache misses
        let _ = loader.get_schema(&conn, "table1").unwrap().unwrap();
        let _ = loader.get_schema(&conn, "table2").unwrap().unwrap();
        
        // Now accessing again should hit cache
        let schema1 = loader.get_schema(&conn, "table1").unwrap().unwrap();
        let schema2 = loader.get_schema(&conn, "table2").unwrap().unwrap();
        
        assert_eq!(schema1.columns.len(), 1);
        assert_eq!(schema2.columns.len(), 1);
        
        // Should have cache hit rate of 0.5 (2 hits out of 4 total requests)
        let hit_rate = loader.get_cache_hit_rate();
        assert!(hit_rate >= 0.4, "Expected hit rate >= 0.4, got {hit_rate}");
        
        // Test preloading functionality
        let tables = vec!["table1".to_string(), "table2".to_string()];
        loader.preload_schemas(&conn, &tables).unwrap();
    }
}