c# - 如何使用模拟匿名类型的设置？

Question

我有以下存储库：

interface IReportingRepository where T: Report
{
     IEnumerable<T> GetReports<T>(object constraints);
}

我试图模拟对这个存储库的调用：

var reportingRepostory = new Mock<IReportingRepository>();
                       reportingRepostory.Setup(x => 
                       x.GetReports<ServiceReport (Moq.It.IsAny<object>())).
                       Returns(new List<ServiceReport>(){Report1, Report2});

然而，而不是通过

Moq.It.IsAny<object>()

我想传递匿名类型

new {Activated = true, Enabled = true}

这样我就可以设置我的期望，即使用正确的匿名类型。

Answer 1

您可以在一些反射帮助下使用自定义匹配器：

var reportingRepostory = new Mock<IReportingRepository>();
reportingRepostory
    .Setup(x => x.GetReports<ServiceReport>(HasProperties()))
    .Returns(new List<ServiceReport>(){Report1, Report2});

whereHasProperties方法实现如下：

private object HasProperties()
{
    return Match.Create(
        (object o)  =>
        {
            var properties = o.GetType().GetProperties();
            return properties.Any(p => p.Name == "Available")
                && properties.Any(p => p.Name == "Enabled");
        });
}    

Answer 2

原始解决方案无法解决的一些实现错误：

new {Activated = true, Enabled = false}
new {Activated = true, Enabled = true, Extra = "I'm not meant to be here!"}
new {Activated = true, Enabled = "true"}

根据您的 IReportingRepository GetReports 方法实现的复杂性，可能值得考虑验证匿名类型的属性值和值类型是否符合预期，并且仅存在预期的属性。

var reportingRepostory = new Mock<IReportingRepository>();
reportingRepostory
    .Setup(x => x.GetReports<ServiceReport>(IsAnonymousType(new {Activated = true, Enabled = true})))
    .Returns(new List<ServiceReport>(){Report1, Report2});

IsAnonymousType 方法在哪里：

private static object IsAnonymousType(object expected)
{
    return Match.Create(
        (object actual) =>
        {
            if (expected == null)
            {
                if (actual == null)
                    return true;
                else
                    return false;
            }
            else if (actual == null)
                return false;

            var expectedPropertyNames = expected.GetType().GetProperties().Select(x => x.Name);
            var expectedPropertyValues = expected.GetType().GetProperties().Select(x => x.GetValue(expected, null));
            var actualPropertyNames = actual.GetType().GetProperties().Select(x => x.Name);
            var actualPropertyValues = actual.GetType().GetProperties().Select(x => x.GetValue(actual, null));

            return expectedPropertyNames.SequenceEqual(actualPropertyNames)
                && expectedPropertyValues.SequenceEqual(actualPropertyValues);
        });
}