public void TestSetup()
{
var connectionStringBuilder = new SqliteConnectionStringBuilder {
DataSource = ":memory:"
};
var connectionString = connectionStringBuilder.ToString();
var connection = new SqliteConnection(connectionString);
var options = new DbContextOptionsBuilder <SchoolDbContext>()
.UseSqlite(connection)
.Options;
_dbContext = new SchoolDbContext(options);
_dbContext.Database.OpenConnection();
_dbContext.Database.EnsureCreated();
_dbContext.EnsureSeeded();
_testController = new ClassesController(_dbContext);
}