[英]Unit test controller with IConfiguration using Moq and Mock setup returns null
[英]Mock returns null when mocking using Moq
我可能在这里遗漏了一些明显的东西。 使用 Asp.Net 核心后台服务。 简化的设置如下:
苏特
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){}
....
....
}
构建器
public interface IBuilder
{
IConsumer<string, string> Build(Func<string> providerFunc);
}
单元测试
[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);
....
....
}
问题
_consumer = _consumerBuilder.Build(()=> Provider)
返回null ,尽管我在测试中提供了模拟设置。我错过了什么? 任何指针将不胜感激。
使用了错误的参数匹配器。
被模拟的成员期望Func<string>
IConsumer<string, string> Build(Func<string> providerFunc);
但是您的代码设置It.IsAny<string>
mockBuilder
.Setup(x => x.Build(It.IsAny<string>)) //<-- WRONG
.Returns(mockConsumer.Object);
应该是It.IsAny<Func<string>>()
mockBuilder
.Setup(x => x.Build(It.IsAny<Func<string>>())) //<--
.Returns(mockConsumer.Object);
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