xunit-如何在单元测试中获取HttpContext.User.Identity

HttpContext在这种特殊情况下，确实没有必要模拟。

使用DefaultHttpContext和设置完成测试所需的成员

例如

[Theory]
[MemberData(nameof(TestCreateUsergroupItemData))]
public async Task TestPostUsergroupItem(Usergroup usergroup) {
    // Arrange

    //...

    var identity = new GenericIdentity("some name", "test");
    var contextUser = new ClaimsPrincipal(identity); //add claims as needed

    //...then set user and other required properties on the httpContext as needed
    var httpContext = new DefaultHttpContext() {
        User = contextUser;
    };

    //Controller needs a controller context to access HttpContext
    var controllerContext = new ControllerContext() {
        HttpContext = httpContext,
    };
    //assign context to controller
    UsergroupController controller = new UsergroupController(context, mapper) {
        ControllerContext = controllerContext,
    };

    // Act
    var controllerResult = await controller.Post(usergroup).ConfigureAwait(false);

    // Assert
    ....
}