如何在ASP.net Core中编写自定义模型绑定程序的单元测试

本文介绍了如何在ASP Core中编写自定义模型绑定程序的单元测试的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我已经为属性编写了自定义模型活页夹。现在，我正在尝试编写相同的单元测试，但无法为模型绑定器创建对象。谁能帮我 ？下面是我必须为其编写测试的代码。

I have written custom model binder for a property. Now I am trying to write unit test for the same but not able to create object for model binder. Can anyone help me ? Below is the code for which I have to write test.

public class JourneyTypesModelBinder : IModelBinder { public Task BindModelAsync(ModelBindingContext bindingContext) { bool IsSingleWay = Convert.ToBoolean((bindingContext.ValueProvider.GetValue("IsSingleWay")).FirstValue); bool IsMultiWay = Convert.ToBoolean((bindingContext.ValueProvider.GetValue("IsMultiWay")).FirstValue); JourneyTypes journeyType = JourneyTypes.None; bool hasJourneyType = Enum.TryParse((bindingContext.ValueProvider.GetValue("JourneyType")).FirstValue, out journeyType); if (!hasJourneyType) { if (IsSingleWay) journeyType = JourneyTypes.Single; else journeyType = JourneyTypes.MultiWay; } bindingContext.Result = ModelBindingResult.Success(journeyType); return Task.CompletedTask; } }

推荐答案

我已经创建了单位使用Nunit进行测试（与XUnit几乎相同），然后使用Moq模拟依赖关系。联机C＃编译器可能会导致一些错误，但是下面显示的代码将为您提供这个想法。

I have created the unit test with Nunit (which is almost the same withy XUnit) and I mocked dependencies with Moq. There might be some errors due to online C# compiler but code shown below will give you the idea.

[TestFixture] public class BindModelAsyncTest() { private JourneyTypesModelBinder _modelBinder; private Mock<ModelBindingContext> _mockedContext; // Setting up things public BindModelAsyncTest() { _modelBinder = new JourneyTypesModelBinder(); _mockedContext = new Mock<ModelBindingContext>(); _mockedContext.Setup(c => c.ValueProvider) .Returns(new ValueProvider() { // Initialize values that are used in this function // "IsSingleWay" and the other values }); } private JourneyTypesModelBinder CreateService => new JourneyTypesModelBinder(); [Test] public Task BindModelAsync_Unittest() { //Arrange //We set variables in setup function. var unitUnderTest = CreateService(); //Act var result = unitUnderTest.BindModelAsync(_mockedContext); //Assert Assert.IsNotNull(result); Assert.IsTrue(result is Task.CompletedTask); } }