[英]How can I create unit tests involving collections in c#?
I have a number of methods in C# which return various collections which I wish to test. 我在C#中有许多方法可以返回我希望测试的各种集合。 I would like to use as few test APIs as possible - performance is not important.
我想尽可能少地使用测试API - 性能并不重要。 A typical example is:
一个典型的例子是:
HashSet<string> actualSet = MyCreateSet();
string[] expectedArray = new string[]{"a", "c", "b"};
MyAssertAreEqual(expectedArray, actualSet);
//... // ...
void MyAssertAreEqual(string[] expected, HashSet<string> actual)
{
HashSet<string> expectedSet = new HashSet<string>();
foreach {string e in expected)
{
expectedSet.Add(e);
}
Assert.IsTrue(expectedSet.Equals(actualSet));
}
I am having to write a number of signatures according to whether the collections are arrays, Lists, ICollections, etc. Are there transformations which simplify this (eg for converting an array to a Set?). 我必须根据集合是否是数组,列表,ICollections等来编写许多签名。是否存在简化此操作的转换(例如,将数组转换为Set?)。
I also need to do this for my own classes. 我还需要为自己的课程这样做。 I have implemented HashCode and Equals for them.
我已经为他们实现了HashCode和Equals。 They are (mainly) subclassed from (say) MySuperClass.
它们(主要)是(比如)MySuperClass的子类。 Is it possible to implement the functionality:
是否可以实现该功能:
void MyAssertAreEqual(IEnumerable<MySuperClass> expected,
IEnumerable<MySuperClass> actual);
such that I can call: 这样我可以打电话:
IEnumerable<MyClassA> expected = ...;
IEnumerable<MyClassA> actual = ...;
MyAssertAreEqual(expected, actual);
rather than writing this for every class 而不是为每个班级写这个
Both NUnit and MSTest (probably the other ones as well) have a CollectionAssert class NUnit和MSTest(可能还有其他的)都有一个CollectionAssert类
If you are using .NET 3.5 you can use the Enumerable.SequenceEqual method. 如果您使用的是.NET 3.5,则可以使用Enumerable.SequenceEqual方法。
Assert.IsTrue(seqA.SequenceEqual(seqB));
You should use OrderBy on both sequences prior to calling SequenceEqual if you only care about the elements being equal and not the order. 如果只关心元素相等而不是顺序,则应在调用SequenceEqual之前在两个序列上使用OrderBy。
Have you tried using the CollectionAssert that comes with NUnit. 您是否尝试过使用NUnit附带的CollectionAssert 。
It asserts against the two collections and compares the items within the collection 它对两个集合断言并比较集合中的项目
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