Question

我正在为我的数据库连接编写单元测试。

我有以下课程

Public class A
{
    public IDbConnection _dbConnection;

    public A()
    {
       _dbConnection = new SqlConnection(connectionStringName);
    }

    public int ExecuteNoneQuery(CommandDefination command)
    {
       return _dbConnection.Execute(command);
    }
}

我想测试这个类，我可以用Microsoft Stub / Shim测试

我已经编写了以下代码，但它无效。

[TestMethod]
public void TestMethod1()
{
    StubIDbConnection stubIDbConnection = new StubIDbConnection();
    stubIDbConnection.Execute =(null) => -1;
    var a = new classA();
    int answer = a.ExecuteNoneQuery(null);
    Assert.AreEqual(-1, answer);

 }

Answer 1

您可以轻松地使用A类的构造函数来插入依赖项，将以下构造函数添加到类A中：

public A(IDBConnection connection)
{
   _dbConnection = connection;
}

然后你的测试看起来像：

[TestMethod]
public void TestMethod1()
{
    StubIDbConnection stubIDbConnection = new StubIDbConnection();
    stubIDbConnection.Execute =(null) => -1;
    var a = new classA(stubIDbConnection);
    int answer = a.ExecuteNoneQuery(null);
    Assert.AreEqual(-1,answer);
}

我如何存根IDBconnection

1 个答案: