WebApi2官网学习记录---单元测试-白红宇

WebApi2官网学习记录---单元测试

阅读量：4681 次

发布时间：2019-06-09

本文共 9129 字，大约阅读时间需要 30 分钟。

如果没有对应的web api模板，首先使用nuget进行安装

例子1：

ProductController 是以硬编码的方式使用StoreAppContext类的实例，可以使用依赖注入模式，在外部指定上下文实例

1  public interface IStoreAppContext:IDisposable  2     {  3          DbSet
      
        Products { get; set; }  4          int SaveChanges();  5          void MarkAsModified(Product item);  6     }  7   8 public class StoreAppContext : DbContext,IStoreAppContext  9     { 10         // You can add custom code to this file. Changes will not be overwritten. 11         //  12         // If you want Entity Framework to drop and regenerate your database 13         // automatically whenever you change your model schema, please use data migrations. 14         // For more information refer to the documentation: 15         // http://msdn.microsoft.com/en-us/data/jj591621.aspx 16      17         public StoreAppContext() : base("name=StoreAppContext") 18         { 19         } 20  21         public DbSet
       
         Products { get; set; } 22  23         public void MarkAsModified(Product item) 24         { 25             Entry(item).State = EntityState.Modified; 26         } 27     } 28  29 public class ProductsController : ApiController 30     { 31         private IStoreAppContext db = new StoreAppContext(); 32  33         public ProductsController() { } 34  35         public ProductsController(IStoreAppContext context) 36        { 37           db = context; 38         } 39         // GET: api/Products 40         public IQueryable
        
          GetProducts() 41         { 42             return db.Products; 43         } 44  45         // GET: api/Products/5 46         [ResponseType(typeof(Product))] 47         public IHttpActionResult GetProduct(int id) 48         { 49             Product product = db.Products.Find(id); 50             if (product == null) 51             { 52                 return NotFound(); 53             } 54  55             return Ok(product); 56         } 57  58         // PUT: api/Products/5 59         [ResponseType(typeof(void))] 60         public IHttpActionResult PutProduct(int id, Product product) 61         { 62             if (!ModelState.IsValid) 63             { 64                 return BadRequest(ModelState); 65             } 66  67             if (id != product.Id) 68             { 69                 return BadRequest(); 70             } 71  72             db.MarkAsModified(product); 73  74             try 75             { 76                 db.SaveChanges(); 77             } 78             catch (DbUpdateConcurrencyException) 79             { 80                 if (!ProductExists(id)) 81                 { 82                     return NotFound(); 83                 } 84                 else 85                 { 86                     throw; 87                 } 88             } 89  90             return StatusCode(HttpStatusCode.NoContent); 91         } 92  93         // POST: api/Products 94         [ResponseType(typeof(Product))] 95         public IHttpActionResult PostProduct(Product product) 96         { 97             if (!ModelState.IsValid) 98             { 99                 return BadRequest(ModelState);100             }101 102             db.Products.Add(product);103             db.SaveChanges();104 105             return CreatedAtRoute("DefaultApi", new { id = product.Id }, product);106         }107 108         // DELETE: api/Products/5109         [ResponseType(typeof(Product))]110         public IHttpActionResult DeleteProduct(int id)111         {112             Product product = db.Products.Find(id);113             if (product == null)114             {115                 return NotFound();116             }117 118             db.Products.Remove(product);119             db.SaveChanges();120 121             return Ok(product);122         }123 124         protected override void Dispose(bool disposing)125         {126             if (disposing)127             {128                 db.Dispose();129             }130             base.Dispose(disposing);131         }132 133         private bool ProductExists(int id)134         {135             return db.Products.Count(e => e.Id == id) > 0;136         }137     }

View Code

单元测试代码：

1  public  class TestDbSet
      
       :DbSet
       
        ,IQueryable,IEnumerable
        
           2         where T:class  3     {  4         ObservableCollection
         
           _data;  5         IQueryable _query;  6   7         public TestDbSet()  8         {  9             _data = new ObservableCollection
          
           (); 10             _query = _data.AsQueryable(); 11         } 12  13         public override T Add(T item) 14         { 15             _data.Add(item); 16             return item; 17         } 18  19         public override T Remove(T item) 20         { 21             _data.Remove(item); 22             return item; 23         } 24  25         public override T Attach(T item) 26         { 27             _data.Add(item); 28             return item; 29         } 30  31         public override T Create() 32         { 33             return Activator.CreateInstance
           
            (); 34 } 35 36 public override TDerivedEntity Create
            
             () 37 { 38 return Activator.CreateInstance
             
              (); 39 } 40 41 public override ObservableCollection
              
                Local 42 { 43 get { return new ObservableCollection
               
                (_data); } 44 } 45 46 Type IQueryable.ElementType 47 { 48 get { return _query.ElementType; } 49 } 50 51 System.Linq.Expressions.Expression IQueryable.Expression 52 { 53 get { return _query.Expression; } 54 } 55 56 IQueryProvider IQueryable.Provider 57 { 58 get { return _query.Provider; } 59 } 60 61 System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() 62 { 63 return _data.GetEnumerator(); 64 } 65 66 IEnumerator
                
                  IEnumerable
                 
                  .GetEnumerator() 67 { 68 return _data.GetEnumerator(); 69 } 70 } 71 72 class TestProductDbSet:TestDbSet
                  
                    73 { 74 public override Product Find(params object[] keyValues) 75 { 76 return this.SingleOrDefault(p=>p.Id==(int)keyValues.Single()); 77 } 78 } 79 80 class TestStoreAppContext : IStoreAppContext 81 { 82 public TestStoreAppContext() 83 { 84 this.Products = new TestProductDbSet(); 85 } 86 87 public System.Data.Entity.DbSet
                   
                     Products { get; set; } 88 89 90 public int SaveChanges() 91 { 92 return 0; 93 } 94 95 public void MarkAsModified(Product item) 96 { 97 98 } 99 100 public void Dispose()101 {102 103 }104 }105 106 public class TestProductController107 {108 [TestMethod]109 public void PostProduct_ShouldReturnSameProduct()110 {111 var controller = new ProductsController(new TestStoreAppContext());112 var item = GetDemoProduct();113 114 var result=controller.PostProduct(item) as CreatedAtRouteNegotiatedContentResult
                    
                     ;115 Assert.IsNotNull(result);116 Assert.AreEqual(result.RouteName, "DefaultApi");117 Assert.AreEqual(result.RouteValues["id"], result.Content.Id);118 Assert.AreEqual(result.Content.Name, item.Name);119 }120 [TestMethod]121 public void PutProduct_ShouldReturnStatusCode()122 {123 var controller = new ProductsController(new TestStoreAppContext());124 125 var item = GetDemoProduct();126 127 var result = controller.PutProduct(item.Id, item) as StatusCodeResult;128 Assert.IsNotNull(result);129 Assert.IsInstanceOfType(result, typeof(StatusCodeResult));130 Assert.AreEqual(HttpStatusCode.NoContent, result.StatusCode);131 }132 133 [TestMethod]134 public void PutProduct_ShouldFail_WhenDifferentID()135 {136 var controller = new ProductsController(new TestStoreAppContext());137 138 var badresult = controller.PutProduct(999, GetDemoProduct());139 Assert.IsInstanceOfType(badresult, typeof(BadRequestResult));140 }141 142 [TestMethod]143 public void GetProduct_ShouldReturnProductWithSameID()144 {145 var context = new TestStoreAppContext();146 context.Products.Add(GetDemoProduct());147 148 var controller = new ProductsController(context);149 var result = controller.GetProduct(3) as OkNegotiatedContentResult
                     
                      ;150 151 Assert.IsNotNull(result);152 Assert.AreEqual(3, result.Content.Id);153 }154 155 [TestMethod]156 public void GetProducts_ShouldReturnAllProducts()157 {158 var context = new TestStoreAppContext();159 context.Products.Add(new Product { Id = 1, Name = "Demo1", Price = 20 });160 context.Products.Add(new Product { Id = 2, Name = "Demo2", Price = 30 });161 context.Products.Add(new Product { Id = 3, Name = "Demo3", Price = 40 });162 163 var controller = new ProductsController(context);164 var result = controller.GetProducts() as TestProductDbSet;165 166 Assert.IsNotNull(result);167 Assert.AreEqual(3, result.Local.Count);168 }169 170 [TestMethod]171 public void DeleteProduct_ShouldReturnOK()172 {173 var context = new TestStoreAppContext();174 var item = GetDemoProduct();175 context.Products.Add(item);176 177 var controller = new ProductsController(context);178 var result = controller.DeleteProduct(3) as OkNegotiatedContentResult
                      
                       ;179 180 Assert.IsNotNull(result);181 Assert.AreEqual(item.Id, result.Content.Id);182 }183 Product GetDemoProduct()184 {185 return new Product() { Id = 3, Name = "Demo name", Price = 5 };186 }187 }