xunit 构造函数在每次测试之前运行

Question

在测试类中，构造函数在每次测试之前启动，构造函数提供的初始化数据不能被以下测试访问。

我希望所有测试都可以访问初始化数据。 （只能创建一次）

[Category("Basics")]
[Collection("DD")]
[ExcludeFromCodeCoverage]
public class SecurityTests : TestUnitBase
{
    StartUpFixture fixture;
    public AuthenticationTests(StartUpFixture fixture)
       : base()
    {
        this.fixture = fixture;
    }

    [Fact(DisplayName = "Successful response Test1")]
    public void SuccessfulResponseTest1()
    {
        var users = base.Db.Users.FirstOrDefault(x => x.Name == "abc");
        ...
    }

    [Fact(DisplayName = "Successful response Test2")]
    public void SuccessfulResponseTest2()
    {
        var users = base.Db.Users.FirstOrDefault(x => x.Name == "xyz");
        ...
    }

提前致谢。

Answer 1

您可以使用 Xunit 类灯具。使用类夹具时，xUnit.net 将确保在任何测试运行之前创建夹具实例，并且一旦所有测试完成，它将通过调用 Dispose（如果存在）来清理夹具对象。例如：

//similar to base class
public class DatabaseFixture : IDisposable
{
    public SqlConnection Db { get; private set; }
    public DatabaseFixture()
    {
        Db = new SqlConnection("MyConnectionString");

        // initialize data in the test database
    }

    public void Dispose()
    {
        // clean up test data from the database
    }
}

//Class where you want to use shared class instance
public class MyDatabaseTests : IClassFixture<DatabaseFixture>
{
    DatabaseFixture dbFixture;

    public MyDatabaseTests(DatabaseFixture fixture)
    {
        this.dbFixture = fixture;
    }

    // write tests, using dbFixture.Db to get access to the SQL Server
}

对于每个测试，它都会创建一个新的 MyDatabaseTests 实例，并将 DatabaseFixture 的共享实例传递给构造函数。

Xunit 文档here。

希望对你有帮助。

28/10 编辑 对于多个夹具，您可以创建一个封装其他两个夹具的类，如下所示，并创建启动夹具以在 db 夹具之前运行：

public class SecurityTestsFixture : IDisposable
{
    public DatabaseFixture Dbfixture { get; private set; }
    public StartupTestFixture Startupfixture { get; private set; }

    public SecurityTestsFixture()
    {
        Startupfixture = new StartupTestFixture();
        Dbfixture = new DatabaseFixture(Startupfixture);
    }

    public void Dispose()
    {
        // clean up code
        Dbfixture.Dispose();
    }

    public class StartupTestFixture
    {
        public string SqlConnString { get; private set; }
        public StartupTestFixture()
        {
            SqlConnString = ConfigurationManager.AppSettings["SqlConnectionString"];

            // other startup code
        }
    }

    public class DatabaseFixture : IDisposable
    {
        public SqlConnection Db { get; private set; }
        public DatabaseFixture(StartupTestFixture sFixture)
        {
            Db = new SqlConnection(sFixture.SqlConnString);

            // initialize data in the test database
        }

        public void Dispose()
        {
            // clean up test data from the database
        }
    }
}

和测试类：

public class Xunittests : IClassFixture<SecurityTestsFixture>
{
    SecurityTestsFixture _securityFixture;
    public Xunittests(SecurityTestsFixture securityfixture)
    {
        _securityFixture = securityfixture;
    }

    [Fact(DisplayName = "Successful response Test1")]
    public void SuccessfulResponseTest1()
    {
        var db = _securityFixture.Dbfixture.Db;
        //var users = db.Users.FirstOrDefault(x => x.Name == "...");
        Assert.Equal("test", "test");
    }
}