单元测试控制器模拟 ISession

Question

我想对我的控制器进行单元测试，但我在读取 HttpContext.Session 的值时遇到问题。
我想从我的控制器中模拟这个片段：HttpContext.Session.Get<int>(Foo)

与和 How to mock Session Object in asp net core 我得出以下解决方案：

我的测试：

public void GetFoos_AllGood_ReturnList()
{
  //Arrange
  Mock<ISession> sessionMock = new Mock<ISession>();
  var fooSessionValue = new byte[0];

  Web.Controllers.FooController fooController = new Web.Controllers.FooController();
  fooController.ControllerContext.HttpContext = new DefaultHttpContext();
  fooController.ControllerContext.HttpContext.Request.Headers["Foo"] = 0;

  Mock<IServiceCollection> mock = new Mock<IServiceCollection>();
  mock.Object.AddSession(); // Tried this, but failed

  //Setup
  sessionMock.Setup(_ => _.Set("Foo", It.IsAny<byte[]>())).Callback<string, byte[]>((k, v) => fooSessionValue = v);
  sessionMock.Setup(_ => _.TryGetValue("Foo", out fooSessionValue)).Returns(true);
  mockWebDataManager.Setup(b => b.GetFoos(It.IsAny<FooArgs>())).Returns(new FooResult() { Foos = new List<Foo>() });

  //Act
  var result = fooController.GetFoos() as JsonResult;

  //Assert
  Assert.NotNull(result);
  Assert.Equal(200, result.StatusCode);
}

我的控制器：

internal virtual DataArgs CreateArgs()
{
  return new FooArgs
  {
     HttpContext.Session.Get<int>(Foo) // I want to Mock this value    
  };
}

[HttpGet]
public IActionResult GetFoos()
{
  FooArgs args = CreateArgs();
  ...
}

Answer 1

如果有一天有人遇到同样的问题，请看这里：

public void GetFoos_AllGood_ReturnList()
{
  //Arrange
  Mock<ISession> sessionMock = new Mock<ISession>();

  Web.Controllers.FooController fooController = new Web.Controllers.FooController();
  fooController.ControllerContext.HttpContext = new DefaultHttpContext();
  fooController.ControllerContext.HttpContext.Request.Headers["Foo"] = 0; 
  fooController.ControllerContext.HttpContext.Session = sessionMock.Object;

  //Act
  var result = fooController.GetFoos() as JsonResult;

  //Assert
  Assert.NotNull(result);
}

Answer 2

感谢 Hypernate 的回答，但就我而言，我不得不在单元测试中处理 GetInt32 和 SetInt32 扩展方法。根据下面的 source code 是实现

public static void SetInt32(this ISession session, string key, int value)
        {
            var bytes = new byte[]
            {
                (byte)(value >> 24),
                (byte)(0xFF & (value >> 16)),
                (byte)(0xFF & (value >> 8)),
                (byte)(0xFF & value)
            };
            session.Set(key, bytes);
        }

public static int? GetInt32(this ISession session, string key)
        {
            var data = session.Get(key);
            if (data == null || data.Length < 4)
            {
                return null;
            }
            return data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
        }

所以按照回答中提到的内容，我不得不如下修改一点来处理它。

 Mock<ISession> sessionMock = new Mock<ISession>();
        var key = "FY";
        int fy = 2020;
        var value =  new byte[]
        {
            (byte)(fy >> 24),
            (byte)(0xFF & (fy >> 16)),
            (byte)(0xFF & (fy >> 8)),
            (byte)(0xFF & fy)
        };

  sessionMock.Setup(_ => _.TryGetValue(key, out value)).Returns(true);

我在任何地方都找不到这个所以在这里分享以防对遇到同样问题的人有帮助。

单元测试控制器模拟 ISession

Unit Test Controller mocking ISession

c#

moq

mocking

xunit

asp.net-core