如何对Vapor DB对象进行单元测试

import XCTest
@testable import Vapor
@testable import App // 导入你的Vapor应用程序的模块

final class VaporDBTests: XCTestCase {
    
    var app: Application!
    
    override func setUp() {
        app = Application(.testing)
        try! configure(app)
        try! app.autoMigrate().wait() // 自动迁移数据库
    }
    
    override func tearDown() {
        app.shutdown()
    }
    
    func testCreateAndFetch() throws {
        // 创建新的DB对象
        let db = DB()
        db.name = "Test"
        try db.create(on: app.db).wait()
        
        // 从数据库中获取DB对象
        let fetchedDB = try DB.query(on: app.db)
            .filter(\.$name == "Test")
            .first()
            .unwrap(or: Abort(.notFound))
            .wait()
        
        XCTAssertEqual(db.name, fetchedDB.name)
    }
    
    // 其他测试用例...
}

swift test --enable-test-discovery