两个 collection class 之间的流利断言

Question

我有一个 class 里面 collection class

public class SearchResult {
        public int Id { get; set; }
        public int Total { get; set; }
        public IEnumerable<Book> Books { get; set; }
}

public class Book {
        public int BookId { get; set; }
        public string BookName { get; set; }
        public string Publisher { get; set; }
        public string ISBNCode { get; set; }
        public IList<catagory> Catagories { get; set; }
}

我有一个问题，如果我创建另一个 object，具有相同的 SearchResult 结构，并且我想将 SearchResult 复制到 SearchResultClone，它在 Books 中只复制 BookId 并且 BookName 保持为空。如下图

{
  "Id": 0,
  "Total": 3,
  "Books": [
    {
      "BookId": 1,
      "BookName": "Book A",
      "Publisher": "",
      "ISBNCode": "",
      "Catagories": []
    },
    {
      "BookId": 2,
      "BookName": "Book B",
      "Publisher": "",
      "ISBNCode": "",
      "Catagories": []
    },
    {
      "BookId": 3,
      "BookName": "Book C",
      "Publisher": "",
      "ISBNCode": "",
      "Catagories": []
    }
  ]
}

事件原始结果有Publisher, ISBNCode ..等值如何在 LINQ 中实现？

我的第二个问题是，如果我想像上面那样做出流畅的断言object

var result = await sut.search(query);
result.Should().BeEquivalentTo ({the SearchResultClone })

这个流利的断言怎么写？

Answer 1

您需要根据旧实例创建类的新实例：

var ans = result.Select(sr => new SearchResult {
    Id = sr.Id,
    Total = sr.Total,
    Books = sr.Books.Select(b => new Book { BookId = b.BookId, BookName = b.BookName }).ToList()
}).ToList();

Answer 2

result.Should().BeEquivalentTo ({the SearchResultClone }) 
How to write this fluent assertion ?

如果你的期望（你传递给BeEquivalentTo的对象）是SearchResult类型，那么FA会尝试将ISBN的空值与相同的属性在 sut 上。您可以通过执行以下操作来解决该问题：

sut.Should().BeEquivalentTo(new 
{
  Id = "some value",
  Total = 123,
  Books = new[] 
  {
    new 
    {
      BookId = 123,
      BookName = "some book"
    }
  }
});

两个 collection class 之间的流利断言

Fluent Assertions between two collection class

c#

linq

fluent-assertions