C# ParameterDescriptor类代码示例

        public async Task BindPropertyFromService_WithData_WithEmptyPrefix_GetsBound()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo(),
                ParameterType = typeof(Person)
            };

            var operationContext = ModelBindingTestHelper.GetOperationBindingContext();
            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            // Model
            var boundPerson = Assert.IsType<Person>(modelBindingResult.Model);
            Assert.NotNull(boundPerson);
            Assert.NotNull(boundPerson.Address.OutputFormatter);

            // ModelState
            Assert.True(modelState.IsValid);

            // For non user bound models there should be no entry in model state.
            Assert.Empty(modelState);
        }

      public override ParameterDescriptor[] GetContextConstructorParameters(IConnectionInfo cxInfo)
      {
         var providerNameParameter = new ParameterDescriptor("providerName", "System.String");
         var connectionStringParameter = new ParameterDescriptor("connectionString", "System.String");

         return new[] { providerNameParameter, connectionStringParameter };
      }

        public async Task GenericModelBinder_BindsCollection_ElementTypeFromGreedyModelBinder_EmptyPrefix_Success()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "parameter",
                ParameterType = typeof(List<IFormCollection>)
            };
            // Need to have a key here so that the GenericModelBinder will recurse to bind elements.
            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(request =>
            {
                request.QueryString = new QueryString("?index=10");
            });

            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            var model = Assert.IsType<List<IFormCollection>>(modelBindingResult.Model);
            Assert.Equal(1, model.Count);
            Assert.NotNull(model[0]);

            Assert.Equal(0, modelState.Count);
            Assert.Equal(0, modelState.ErrorCount);
            Assert.True(modelState.IsValid);
        }

        public async Task BindParameter_WithModelBinderType_NoData_ReturnsNull()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo()
                {
                    BinderType = typeof(NullModelNotSetModelBinder)
                },

                ParameterType = typeof(string)
            };

            // No data is passed.
            var operationContext = ModelBindingTestHelper.GetOperationBindingContext();
            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.Null(modelBindingResult);

            // ModelState (not set unless inner binder sets it)
            Assert.True(modelState.IsValid);
            Assert.Empty(modelState);
        }

        public async Task BindProperty_WithData_WithEmptyPrefix_GetsBound()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo(),
                ParameterType = typeof(Person)
            };

            var operationContext = ModelBindingTestHelper.GetOperationBindingContext();
            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            // Model
            var boundPerson = Assert.IsType<Person>(modelBindingResult.Model);
            Assert.NotNull(boundPerson);
            Assert.NotNull(boundPerson.Token);

            // ModelState
            Assert.True(modelState.IsValid);
            Assert.Equal(0, modelState.Count);
        }

 public void Add(ParameterDescriptor parameterDescriptor, string value, IWatchable watchable)
 {
     lock (_itemsLock)
     {
         _items.Add(new Tuple<ParameterDescriptor, string, IWatchable>(parameterDescriptor, value, watchable));
     }
 }

        public void Arguments_HaveCorrectDescription_Returns_CorrectValue(
            string propertyName,
            string expectedDescription)
        {
            //Arrange
            var command = new CommandLineApplication();
            var property = typeof(TestClass).GetProperty(propertyName);
            var descriptor = new ParameterDescriptor(property);

            //Act
            descriptor.AddCommandLineParameterTo(command);

            //Assert
            var actualOption = command.Arguments.First();
            Assert.Equal(propertyName, actualOption.Name);
            Assert.Equal(expectedDescription, actualOption.Description);

            //Arrange
            command.Execute(new string[0] { });

            //Assert
            Assert.Equal(null, descriptor.Value); //Is this right assumption to test?

            //Arrange
            command.Execute(new string[] { "PassedValue" });

            //Assert
            Assert.Equal("PassedValue", descriptor.Value);
        }

        public async Task FromBodyOnActionParameter_EmptyBody_BindsToNullValue()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo()
                {
                    BinderModelName = "CustomParameter",
                    BindingSource = BindingSource.Body
                },
                ParameterType = typeof(Person)
            };

            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(
                request =>
                {
                    request.Body = new MemoryStream(Encoding.UTF8.GetBytes(string.Empty));
                    request.ContentType = "application/json";
                });

            var httpContext = operationContext.HttpContext;
            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);
            Assert.Null(modelBindingResult.Model);
            Assert.Empty(modelState.Keys);
            Assert.True(modelState.IsValid);
        }

        public async Task BindParameter_WithModelBinderType_NonGreedy_NoData()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo()
                {
                    BinderType = typeof(NullResultModelBinder)
                },

                ParameterType = typeof(Person2)
            };

            // No data is passed.
            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(request => { });
            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);

            // ModelState
            Assert.True(modelState.IsValid);
            Assert.Empty(modelState.Keys);
        }

        public async Task BindProperty_WithData_GetsBound(bool fallBackScenario)
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo(),
                ParameterType = typeof(Person)
            };

            var prefix = fallBackScenario ? string.Empty : "Parameter1";
            var queryStringKey = fallBackScenario ? "Token" : prefix + "." + "Token";

            // any valid base64 string
            var expectedValue = new byte[] { 12, 13 };
            var value = Convert.ToBase64String(expectedValue);
            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(
                request =>
                {
                    request.QueryString = QueryString.Create(queryStringKey, value);
                });
            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            // Model
            var boundPerson = Assert.IsType<Person>(modelBindingResult.Model);
            Assert.NotNull(boundPerson);
            Assert.NotNull(boundPerson.Token);
            Assert.Equal(expectedValue, boundPerson.Token);

            // ModelState
            Assert.True(modelState.IsValid);

            Assert.Equal(2, modelState.Keys.Count);
            Assert.Single(modelState.Keys, k => k == prefix);
            Assert.Single(modelState.Keys, k => k == queryStringKey);

            var key = Assert.Single(modelState.Keys, k => k == queryStringKey + "[0]");
            Assert.NotNull(modelState[key].Value); // should be non null bug #2445.
            Assert.Empty(modelState[key].Errors);
            Assert.Equal(ModelValidationState.Valid, modelState[key].ValidationState);

            key = Assert.Single(modelState.Keys, k => k == queryStringKey + "[1]");
            Assert.NotNull(modelState[key].Value); // should be non null bug #2445.
            Assert.Empty(modelState[key].Errors);
            Assert.Equal(ModelValidationState.Valid, modelState[key].ValidationState);
        }

        public void Bind_should_invoke_internal_DataBinder_using_values_from_Request_Params()
        {
            var http = new Mock<HttpContextBase>();
            var attr = new DataBindAttribute();
            var descriptor = new ParameterDescriptor("user", typeof (User));

            http.SetupGet(ctx => ctx.Request.Params).Returns(new NameValueCollection{{"user.Name", "Lyle"}});

            var result = attr.Bind(http.Object, descriptor);

            Assert.IsAssignableFrom<User>(result);
            Assert.AreEqual("Lyle", ((User) result).Name);
        }

        public static object GetValue(Command cmd, ParameterDescriptor pd)
        {
            object value = null;

            if (pd.SourceLocation == SourceLocation.FromCommand)
            {
                value = cmd.Arguments[pd.KeyInSource];
            }
            else
            {
                throw new Exception("Unknow SourceLocation");
            }
            return value;
        }

        public async Task BindProperty_WithData_WithPrefix_GetsBound()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo()
                {
                    BinderModelName = "CustomParameter",
                },

                ParameterType = typeof(Person)
            };

            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(request =>
            {
                request.QueryString = QueryString.Create("CustomParameter.Address.Zip", "1");
            });

            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            // Model
            var boundPerson = Assert.IsType<Person>(modelBindingResult.Model);
            Assert.NotNull(boundPerson);
            Assert.NotNull(boundPerson.Address);
            Assert.Equal(1, boundPerson.Address.Zip);

            // ModelState
            Assert.True(modelState.IsValid);

            Assert.Equal(1, modelState.Keys.Count);
            var key = Assert.Single(modelState.Keys, k => k == "CustomParameter.Address.Zip");
            Assert.NotNull(modelState[key].Value);
            Assert.Equal("1", modelState[key].Value.AttemptedValue);
            Assert.Equal("1", modelState[key].Value.RawValue);
            Assert.NotNull(modelState[key].Value);
            Assert.Empty(modelState[key].Errors);
            Assert.Equal(ModelValidationState.Valid, modelState[key].ValidationState);
        }

        public async Task BindProperty_WithData_WithEmptyPrefix_GetsBound()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo(),
                ParameterType = typeof(Person)
            };

            var data = "Some Data Is Better Than No Data.";
            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(
                request =>
                {
                    request.QueryString = QueryString.Create("Address.Zip", "12345");
                    UpdateRequest(request, data, "Address.File");
                });

            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            // Model
            var boundPerson = Assert.IsType<Person>(modelBindingResult.Model);
            Assert.NotNull(boundPerson.Address);
            var formCollection = Assert.IsAssignableFrom<FormCollection>(boundPerson.Address.FileCollection);
            var file = Assert.Single(formCollection.Files);
            Assert.Equal("form-data; name=Address.File; filename=text.txt", file.ContentDisposition);
            var reader = new StreamReader(file.OpenReadStream());
            Assert.Equal(data, reader.ReadToEnd());

            // ModelState
            Assert.True(modelState.IsValid);
            Assert.Equal(2, modelState.Count);
            Assert.Single(modelState.Keys, k => k == "Address.Zip");
            var key = Assert.Single(modelState.Keys, k => k == "Address.File");
            Assert.NotNull(modelState[key].Value); // should be non null bug #2445.
            Assert.Empty(modelState[key].Errors);
            Assert.Equal(ModelValidationState.Valid, modelState[key].ValidationState);
        }

        public async Task BindPropertyFromHeader_WithPrefix_GetsBound()
        {
            // Arrange
            var argumentBinder = ModelBindingTestHelper.GetArgumentBinder();
            var parameter = new ParameterDescriptor()
            {
                Name = "Parameter1",
                BindingInfo = new BindingInfo()
                {
                    BinderModelName = "prefix",
                },
                ParameterType = typeof(Person)
            };

            // Do not add any headers.
            var operationContext = ModelBindingTestHelper.GetOperationBindingContext(request => {
                request.Headers.Add("Header", new[] { "someValue" });
            });

            var modelState = new ModelStateDictionary();

            // Act
            var modelBindingResult = await argumentBinder.BindModelAsync(parameter, modelState, operationContext);

            // Assert

            // ModelBindingResult
            Assert.NotNull(modelBindingResult);
            Assert.True(modelBindingResult.IsModelSet);

            // Model
            var boundPerson = Assert.IsType<Person>(modelBindingResult.Model);
            Assert.NotNull(boundPerson);
            Assert.NotNull(boundPerson.Address);
            Assert.Equal("someValue", boundPerson.Address.Street);

            // ModelState
            Assert.True(modelState.IsValid);
            Assert.Equal(3, modelState.Count);
            Assert.Single(modelState.Keys, k => k == "prefix.Address");
            Assert.Single(modelState.Keys, k => k == "prefix");

            var key = Assert.Single(modelState.Keys, k => k == "prefix.Address.Header");
            Assert.NotNull(modelState[key].Value);
            Assert.Equal("someValue", modelState[key].Value.RawValue);
            Assert.Equal("someValue", modelState[key].Value.AttemptedValue);
        }