[英]Unit test controller with IConfiguration using Moq and Mock setup returns null
[英]Mock returns null when mocking using Moq
我可能在這里遺漏了一些明顯的東西。 使用 Asp.Net 核心后台服務。 簡化的設置如下:
蘇特
public class OrderService: BaseOrderService
{
IConsumer<string, string> _consumer;
public OrderService(IBuilder consumerBuilder, ILogger logger) : base(logger)
{
_consumer = consumerBuilder.Build(() => Provider);
}
}
public abstract class BaseOrderService: BackgroundService
{
protected BaseOrderService(ILogger logger){}
....
....
}
構建器
public interface IBuilder
{
IConsumer<string, string> Build(Func<string> providerFunc);
}
單元測試
[Fact]
public async Task TestDescription()
{
var mockBuilder = new Mock<IBuilder>();
var mockConsumer = new Mock<IConsumer<string, string>>();
mockBuilder.Setup(x => x.Build(It.IsAny<string>)).Returns(mockConsumer.Object);
var sut = new OrderService(mockBuilder.Object, NullLogger.Instance);
await sut.StartAsync(default);
....
....
}
問題
_consumer = _consumerBuilder.Build(()=> Provider)
返回null ,盡管我在測試中提供了模擬設置。我錯過了什么? 任何指針將不勝感激。
使用了錯誤的參數匹配器。
被模擬的成員期望Func<string>
IConsumer<string, string> Build(Func<string> providerFunc);
但是您的代碼設置It.IsAny<string>
mockBuilder
.Setup(x => x.Build(It.IsAny<string>)) //<-- WRONG
.Returns(mockConsumer.Object);
應該是It.IsAny<Func<string>>()
mockBuilder
.Setup(x => x.Build(It.IsAny<Func<string>>())) //<--
.Returns(mockConsumer.Object);
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