查看本教程：https://dotnetcorecentral.com/blog/sqlite-for-unit-testing-in-net-core/

[Test]
public void Test_Get_By_Id()
{
    var connection = new SqliteConnection("DataSource=:memory:");
    connection.Open();

    var options = new DbContextOptionsBuilder<EmployeeContext>().UseSqlite(connection).Options;

    using (var context = new EmployeeContext(options))
    {
        context.Database.EnsureCreated();
    }

    using (var context = new EmployeeContext(options))
    {
        context.Employees.Add(new Employee { Id = 1, FirstName = "John", LastName = "Doe", Address = "123 Street", HomePhone = "111-111-1111", CellPhone = "222-222-2222" });
        context.SaveChanges();
    }

    using (var context = new EmployeeContext(options))
    {
        var provider = new EmployeeProvider(context);
        var employee = provider.Get(1);

        Assert.AreEqual("John", employee.FirstName);
    }
}

创建一个内存数据库，然后确保数据库已创建，添加任何要检查的内容，然后可以执行任何查询/Assert以检查其是否按预期工作。

只是创建这个方法，并使用“数据库”的其他事实（测试）。希望工程为您。

private ApplicationDbContext GetContext()
    {
        var options = new DbContextOptionsBuilder().
            UseSqlite("Data Source = nameOfYourDatabase.db")
            .Options;

        var db = new ApplicationDbContext(options);

        db.Database.EnsureDeleted();
        db.Database.EnsureCreated();

        return db;
    }

    [Fact]
    public void CreateDatabaseTest()
    {
        using var db = GetContext();
    }