4 回答

TA貢獻1860條經驗 獲得超9個贊
配置模塊獨立于網絡主機相關功能。
您應該能夠創建一個內存配置來進行測試,而無需將其綁定到 Web 主機。
查看以下示例測試
public class TestConfig {
[Required]
public string SomeKey { get; set; }
[Required] //<--NOTE THIS
public string SomeOtherKey { get; set; }
}
//...
[Fact]
public void Should_Fail_Validation_For_Required_Key() {
//Arrange
var inMemorySettings = new Dictionary<string, string>
{
{"Email:SomeKey", "value1"},
//{"Email:SomeOtherKey", "value2"}, //Purposely omitted for required failure
//...populate as needed for the test
};
IConfiguration configuration = new ConfigurationBuilder()
.AddInMemoryCollection(inMemorySettings)
.Build();
//Act
Action act = () => configuration.GetSection("Email").GetValid<TestConfig>();
//Assert
ValidationException exception = Assert.Throws<ValidationException>(act);
//...other assertions of validation results within exception object
}
在我看來,這將接近于集成測試,但理想情況下,您只是使用依賴于框架的特性來隔離擴展方法的測試。

TA貢獻1780條經驗 獲得超4個贊
大多數模擬庫(Moq、FakeItEasy 等)都不能模擬擴展方法。
因此,您必須以 aIConfiguration.Get<T>返回 T 實例的方式“填充”您的 IConfiguration。Nkoski 答案適用于很多場景,但如果您需要測試調用的代碼,IConfiguration.Get<T>則可以使用下面的示例:
using System;
using System.IO;
using System.Text;
using System.Text.Json;
using System.Collections.Generic;
using Microsoft.Extensions.Configuration;
using Xunit;
public class TestClass {
public class Movie
{
public string Name { get; set; }
public decimal Rating { get; set; }
public IList<string> Stars { get; set; } //it works with collections
}
[Fact]
public void MyTest()
{
var movie = new Movie {
Name = "Some Movie",
Rating = 9,
Stars = new List<string>{"Some actress", "Some actor"}
};
var movieAsJson = Encoding.UTF8.GetBytes(JsonSerializer.Serialize(movie));
using(var stream = new MemoryStream(movieAsJson))
{
var config = new ConfigurationBuilder().AddJsonStream(stream).Build();
var movieFromConfig = config.Get<Movie>();
//var sut = new SomeService(config).SomeMethodThatCallsConfig.Get<Movie>()
}
}
}

TA貢獻1829條經驗 獲得超7個贊
解決問題的一種略有不同的方法,避免了 Mock 和大量設置噪音:
InMemoryConfiguration幾乎給了我我需要的東西,所以我對其進行了擴展,以便您可以在構建配置后修改值(我的情況是我在構建配置時不知道所有模擬值)
https://gist.github.com/martinsmith1968/9567de76d2bbe537af05d76eb39b1162
底部的單元測試顯示用法

TA貢獻1828條經驗 獲得超13個贊
[TestClass]
public class UnitTest1
{
[TestMethod]
public void TestMethod1()
{
IConfiguration mock = new MockConfiguration();
var simpleObject = mock.GetValid<SimpleObject>();
Assert.AreEqual(simpleObject.MyConfigStr, "123");
}
}
public class SimpleObject
{
public string MyConfigStr { get; set; }
}
public class MockConfiguration : IConfiguration
{
public IConfigurationSection GetSection(string key)
{
return new MockConfigurationSection()
{
Value = "123"
};
}
public IEnumerable<IConfigurationSection> GetChildren()
{
var configurationSections = new List<IConfigurationSection>()
{
new MockConfigurationSection()
{
Value = "MyConfigStr"
}
};
return configurationSections;
}
public Microsoft.Extensions.Primitives.IChangeToken GetReloadToken()
{
throw new System.NotImplementedException();
}
public string this[string key]
{
get => throw new System.NotImplementedException();
set => throw new System.NotImplementedException();
}
}
public class MockConfigurationSection : IConfigurationSection
{
public IConfigurationSection GetSection(string key)
{
return this;
}
public IEnumerable<IConfigurationSection> GetChildren()
{
return new List<IConfigurationSection>();
}
public IChangeToken GetReloadToken()
{
return new MockChangeToken();
}
public string this[string key]
{
get => throw new System.NotImplementedException();
set => throw new System.NotImplementedException();
}
public string Key { get; }
public string Path { get; }
public string Value { get; set; }
}
public class MockChangeToken : IChangeToken
{
public IDisposable RegisterChangeCallback(Action<object> callback, object state)
{
return new MockDisposable();
}
public bool HasChanged { get; }
public bool ActiveChangeCallbacks { get; }
}
public class MockDisposable : IDisposable
{
public void Dispose()
{
}
}
為 IConfiguration 創建了一個模擬并模仿 ConfigBinder 的行為
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Primitives;
添加了這兩個名稱空間以進行編譯
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