我对单元测试和模拟是全新的,而且还很不熟悉。我使用的是moq框架,我需要模拟一个集合,这样它将生成一个具有我提供的值的单个成员。
所讨论的集合类是
System.Configuration.SettingsPropertyCollection
,其中包含
SettingsProperty
物体。
反过来,
设置属性
有一个
Attributes
返回
SettingsAttributeDictionary
.
我需要我的收藏来制作一个单曲
设置属性
,它有一个自定义属性(派生自
System.Attribute
在其
Attributes.SettingsAttributeDictionary
.
我真的在努力想办法解决这个问题,但到目前为止没有任何效果。我试过伸出我的舌头,用滑稽的脸去抓它,但没用。
这是我迄今为止尝试的代码,在代码中注释的点处抛出异常,因此测试当然总是失败。
[TestMethod]
public void GetPropertySettings_Should_Return_Default_Values_When_Device_Not_Registered()
{
const string deviceName = "My.UnitTest";
const string deviceType = "Switch";
var deviceId = String.Format("{0}.{1}", deviceName, deviceType);
Mock<IProfile> mockProfile = new Mock<IProfile>();
Mock<SettingsContext> mockSettingsContext = new Mock<SettingsContext>();
// Construct a SettingsPropertyCollection populated with a single property.
// The single property will have a fixed name and default value, and will also have a single
// attribute, giving teh ASCOM DeviceId.
var deviceAttribute = new ASCOM.DeviceIdAttribute(deviceId);
var attributes = new SettingsAttributeDictionary();
attributes.Add(typeof(DeviceIdAttribute), deviceAttribute);
var settingsProperty = new SettingsProperty(SettingName, typeof(string), null, false, SettingDefaultValue, SettingsSerializeAs.String, attributes, true, true);
var propertyCollection = new SettingsPropertyCollection();
propertyCollection.Add(settingsProperty);
// Now comes the interesting part where we call our IProfile - this is where we really need Moq.
// Expectations:
// - mockProfile must have it's DeviceType set.
// - mockProfile's device type (captured in setDeviceType) must match deviceType.
// - The returned SettingsPropertyValueCollection must not be empty.
// - The returned SettingsPropertyValueCollection must have exactly one entry.
// - The entry must match the value of SettingDefaultValue.
// Expectation: IProfile must have its DeviceType set. We capture the value into setDeviceType.
var setDeviceType = String.Empty;
mockProfile.SetupSet(x => x.DeviceType).Callback(y => setDeviceType = y);
// Finally, it is time to call the method we want to test
var settingsProvider = new SettingsProvider(mockProfile.Object);
// THE NEXT LINE THROWS AN EXCEPTION
// IF I TRY TO STEP INTO IT, IT NEVER RETURNS AND THE TEST RUN JUST ENDS.
var result = settingsProvider.GetPropertyValues(mockSettingsContext.Object, propertyCollection);
// Now lets verify that everything went as expected
// First, let's test that the parsing of DeviceId was as expected: IProvider.DeviceType was set to the expected value
Assert.AreEqual(deviceType, setDeviceType);
// Then let's test that the methods of IProvider that we mocked were called
mockProfile.VerifyAll();
// With this done, let's turn to the output of the method
// Firstly, we test that the resulting collection contains exactly one item of the type SettingsPropertyValue
Assert.IsTrue(result.Count > 0);
Assert.AreEqual(1, result.Count);
Assert.IsTrue(result.OfType<SettingsPropertyValue>().Count() > 0);
// Then let's inspect the contained SettingsProviderValue further
var settingsPropertyValue = result.OfType<SettingsPropertyValue>().First();
// First IsDirty flag must never be set
Assert.IsFalse(settingsPropertyValue.IsDirty);
// The PropertyValue must be the default value we passed in
Assert.AreEqual(SettingDefaultValue, settingsPropertyValue.PropertyValue);
}
引发的异常(由测试运行程序报告)是:
测试方法ascom.platform.test.settingsProviderTest.GetPropertySettings在设备未注册时应返回默认值。引发异常:System.ArgumentException:类型System.Configuration.settingsContext实现ISerializable,但未能提供反序列化构造函数。
