我有一个方法来使用IHttpContextAccessor获取标头值
public class HeaderConfiguration : IHeaderConfiguration
{
public HeaderConfiguration()
{
}
public string GetTenantId(IHttpContextAccessor httpContextAccessor)
{
return httpContextAccessor.HttpContext.Request.Headers["Tenant-ID"].ToString();
}
}
我正在测试GetBookByBookId方法
假设该方法如下所示：
public class Book
{
private readonly IHttpContextAccessor _httpContextAccessor;
private IHeaderConfiguration _headerConfiguration;
private string _tenantID;
public Book(IHeaderConfiguration headerConfiguration,IHttpContextAccessor httpContextAccessor){
var headerConfig = new HeaderConfiguration();
_httpContextAccessor = httpContextAccessor;
_tenantID = headerConfig.GetTenantId(_httpContextAccessor);
}
public Task<List<BookModel>> GetBookByBookId(string id){
//do something with the _tenantId
//...
}
}
这是我对GetBookByBookId方法的单元测试
[Fact]
public void test_GetBookByBookId()
{
//Arrange
//Mock IHttpContextAccessor
var mockHttpContextAccessor = new Mock<IHttpContextAccessor>();
mockHttpContextAccessor.Setup(req => req.HttpContext.Request.Headers["Tenant-ID"].ToString()).Returns(It.IsAny<string>());
//Mock HeaderConfiguration
var mockHeaderConfiguration = new Mock<IHeaderConfiguration>();
mockHeaderConfiguration.Setup(x => x.GetTenantId(mockHttpContextAccessor.Object)).Returns(It.IsAny<string>());
var book = new Book( mockHttpContextAccessor.Object,mockHeaderConfiguration.Object);
var bookId = "100";
//Act
var result = book.GetBookByBookId(bookId);
//Assert
result.Result.Should().NotBeNull().And.
BeOfType<List<BookModel>>();
}
但对于这一行：
mockHttpContextAccessor.Setup(req => req.HttpContext.Request.Headers["Tenant-ID"].ToString()).Returns(It.IsAny<string>());
它说
System.NotSupportedException: ‘Type to mock must be an interface or an abstract or non-sealed class. ‘
解决方法
您可以使用DefaultHttpContext作为IHttpContextAccessor.HttpContext的支持.节省您必须设置太多东西
接下来,您不能使用It.IsAny< string>()作为返回结果.它们仅用于设置表达式.
检查重构器
[Fact]
public async Task test_GetBookByBookId() {
//Arrange
//Mock IHttpContextAccessor
var mockHttpContextAccessor = new Mock<IHttpContextAccessor>();
var context = new DefaultHttpContext();
var fakeTenantId = "abcd";
context.Request.Headers["Tenant-ID"] = fakeTenantId;
mockHttpContextAccessor.Setup(_ => _.HttpContext).Returns(context);
//Mock HeaderConfiguration
var mockHeaderConfiguration = new Mock<IHeaderConfiguration>();
mockHeaderConfiguration
.Setup(_ => _.GetTenantId(It.IsAny<IHttpContextAccessor>()))
.Returns(fakeTenantId);
var book = new Book(mockHttpContextAccessor.Object,mockHeaderConfiguration.Object);
var bookId = "100";
//Act
var result = await book.GetBookByBookId(bookId);
//Assert
result.Should().NotBeNull().And.
BeOfType<List<BookModel>>();
}
Class In Test也可能存在问题,因为它应该在实际显式注入时手动初始化HeaderConfiguration.
public Book(IHeaderConfiguration headerConfiguration,IHttpContextAccessor httpContextAccessor) {
_httpContextAccessor = httpContextAccessor;
_tenantID = headerConfiguration.GetTenantId(_httpContextAccessor);
}
