NUnit 分三篇文章介绍，入门者可阅读文章，有基础者直接参考官方文档。初次写博客，望大家指点。

导航：

单元测试之NUnit一

单元测试之NUnit二

单元测试之NUnit三

除了Assert断言外，NUnit还提供了其它直接断言的方法，比如string、directory、file等。另外，如有需要还可自行扩展。

String Assert

实现了string 类型的断言，包含以下方法：

 public class StringAssertTest

    {

        [Test]

        public void Contains_Test()

        {

            string expected = "a";//期望值。被包含

            string actual = "acb";//真是值。包含

            StringAssert.Contains(expected, actual);

            expected = "d";

            StringAssert.DoesNotContain(expected, actual);

        }

        [Test]

        public void StartsWith_Test()

        {

            string actual = "dcc";

            string expected = "d";

            StringAssert.StartsWith(expected, actual);

            expected = "c";

            StringAssert.DoesNotStartWith(expected, actual);

        }

        [Test]

        public void EndsWith_Test()

        {

            string actual = "dcc";

            string expected = "c";

            StringAssert.EndsWith(expected, actual);

            expected = "d";

            StringAssert.DoesNotEndWith(expected, actual);

        }

        [Test]

        public void EqualIgnoringCase_Test()

        {

            string actual = "adc";

            string expected = "adc";

            StringAssert.AreEqualIgnoringCase(expected, actual);

            expected = "a";

            StringAssert.AreNotEqualIgnoringCase(expected, actual);

        }

        [Test]

        public void Match_Test()

        {

            string actual = "adc";

            string expected = "adc";

            StringAssert.IsMatch(expected, actual);

            expected = "g";

            StringAssert.DoesNotMatch(expected, actual);

        }

    }

Collection Assert

CollectionAssert 提供为实现了IEnumerable的集合比较提供一系列方法：

[Test]

        public void Equal_Test()

        {

            List<int> expected = new List<int> { 1, 2, 3 };

            List<int> actual = new List<int> { 2, 3, 1 };

            CollectionAssert.AreNotEqual(expected, actual);//集合元素位置不同，不相等

            actual = new List<int> { 1, 2, 3 };

            CollectionAssert.AreEqual(expected, actual);

        }

        [Test]

        public void ItemsOfType_Test()

        {

            List<object> cols = new List<object> { "1", "2", "b" };

            CollectionAssert.AllItemsAreInstancesOfType(cols, typeof(string));

        }

更多方法如下：

CollectionAssert.AllItemsAreInstancesOfType(IEnumerable collection, Type expectedType);

CollectionAssert.AllItemsAreInstancesOfType(

    IEnumerable collection, Type expectedType, string message, params object[] args);

CollectionAssert.AllItemsAreNotNull(IEnumerable collection);

CollectionAssert.AllItemsAreNotNull(

    IEnumerable collection, string message, params object[] args);

CollectionAssert.AllItemsAreUnique(IEnumerable collection);

CollectionAssert.AllItemsAreUnique(

    IEnumerable collection, string message, params object[] args);

CollectionAssert.AreEqual(IEnumerable expected, IEnumerable actual);

CollectionAssert.AreEqual(

    IEnumerable expected, IEnumerable actual, string message, params object[] args);

CollectionAssert.AreEquivalent(IEnumerable expected, IEnumerable actual);

CollectionAssert.AreEquivalent(

    IEnumerable expected, IEnumerable actual, string message, params object[] args);

CollectionAssert.AreNotEqual(IEnumerable expected, IEnumerable actual);

CollectionAssert.AreNotEqual(

    IEnumerable expected, IEnumerable actual, string message, params object[] args);

CollectionAssert.AreNotEquivalent(IEnumerable expected, IEnumerable actual);

CollectionAssert.AreNotEquivalent(

    IEnumerable expected, IEnumerable actual, string message, params object[] args);

CollectionAssert.Contains(IEnumerable expected, object actual);

CollectionAssert.Contains(

    IEnumerable expected, object actual, string message, params object[] args);

CollectionAssert.DoesNotContain(IEnumerable expected, object actual);

CollectionAssert.DoesNotContain(

    IEnumerable expected, object actual, string message, params object[] args);

CollectionAssert.IsSubsetOf(IEnumerable subset, IEnumerable superset);

CollectionAssert.IsSubsetOf(

    IEnumerable subset, IEnumerable superset, string message, params object[] args);

CollectionAssert.IsNotSubsetOf(IEnumerable subset, IEnumerable superset);

CollectionAssert.IsNotSubsetOf(

    IEnumerable subset, IEnumerable superset, string message, params object[] args);

CollectionAssert.IsEmpty(IEnumerable collection);

CollectionAssert.IsEmpty(

    IEnumerable collection, string message, params object[] args);

CollectionAssert.IsNotEmpty(IEnumerable collection);

CollectionAssert.IsNotEmpty(

    IEnumerable collection, string message, params object[] args);

CollectionAssert.IsOrdered(IEnumerable collection);

CollectionAssert.IsOrdered(

    IEnumerable collection, string message, params object[] args);

CollectionAssert.IsOrdered(IEnumerable collection, IComparer comparer);

CollectionAssert.IsOrdered(IEnumerable collection,

    IComparer comparer, string message, params object[] args);

Directory Assert

文件夹断言：

        [Test]

        public void Directory_Test()

        {

            string basePath = AppDomain.CurrentDomain.BaseDirectory;

            DirectoryAssert.Exists(basePath + "/Directory"); // 判断文件夹是否存在

        }


 DirectoryAssert.AreEqual(DirectoryInfo expected, DirectoryInfo actual);

DirectoryAssert.AreEqual(DirectoryInfo expected, DirectoryInfo actual,

    string message, params object[] args);

DirectoryAssert.AreNotEqual(DirectoryInfo expected, DirectoryInfo actual);

DirectoryAssert.AreNotEqual(DirectoryInfo expected, DirectoryInfo actual,

    string message, params object[] args);

DirectoryAssert.Exists(DirectoryInfo actual);

DirectoryAssert.Exists(DirectoryInfo actual,

    string message, params object[] args);

DirectoryAssert.Exists(string actual);

DirectoryAssert.Exists(string actual,

    string message, params object[] args);

DirectoryAssert.DoesNotExist(DirectoryInfo actual);

DirectoryAssert.DoesNotExist(DirectoryInfo actual,

    string message, params object[] args);

DirectoryAssert.DoesNotExist(string actual);

DirectoryAssert.DoesNotExist(string actual,

    string message, params object[] args);

File Assert

文件断言：

        [Test]

        public void File_Test()

        {

            // 判断文件是否存在

            FileAssert.Exists(AppDomain.CurrentDomain.BaseDirectory + "/Directory/file.txt");

        }


FileAssert.AreEqual(Stream expected, Stream actual); //判断两个文件流是否相同

FileAssert.AreEqual(

    Stream expected, Stream actual, string message, params object[] args);

FileAssert.AreEqual(FileInfo expected, FileInfo actual); // 判断两个文件是否同一路径的同一文件

FileAssert.AreEqual(

    FileInfo expected, FileInfo actual, string message, params object[] args);

FileAssert.AreEqual(string expected, string actual);

FileAssert.AreEqual(

    string expected, string actual, string message, params object[] args);

FileAssert.AreNotEqual(Stream expected, Stream actual);

FileAssert.AreNotEqual(

    Stream expected, Stream actual, string message, params object[] args);

FileAssert.AreNotEqual(FileInfo expected, FileInfo actual);

FileAssert.AreNotEqual(

    FileInfo expected, FileInfo actual, string message, params object[] args);

FileAssert.AreNotEqual(string expected, string actual);

FileAssert.AreNotEqual(

    string expected, string actual, string message, params object[] args);

FileAssert.Exists(FileInfo actual); //判断文件是否存在

FileAssert.Exists(

    FileInfo actual, string message, params object[] args);

FileAssert.Exists(string actual);

FileAssert.Exists(

    string actual, string message, params object[] args);

FileAssert.DoesNotExist(FileInfo actual);

FileAssert.DoesNotExist(

    FileInfo actual, string message, params object[] args);

FileAssert.DoesNotExist(string actual);

FileAssert.DoesNotExist(

    string actual, string message, params object[] args);

扩展

NUnit本身提供非常全面的功能，一般来说完全满足我们的项目需求。即使不能满足需求，NUnit也是可扩展的，包括：属性、约束条件、断言等的扩展。文档导航

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