C# 如何使用Fluent断言比较两个因属性而异的集合?
我有一个公共类C# 如何使用Fluent断言比较两个因属性而异的集合?,c#,unit-testing,fluent-assertions,C#,Unit Testing,Fluent Assertions,我有一个公共类RuleInfo,它是从内部类Rule创建的 private static RuleInfo CreateRuleInfo(Rule r) { return new RuleInfo { RuleCode = r.RuleId, DisplayName = r.RuleCode, Description = r.Description, LegacyRuleCode = null }; } 它
RuleInfo
,它是从内部类Rule
创建的
private static RuleInfo CreateRuleInfo(Rule r)
{
return new RuleInfo
{
RuleCode = r.RuleId,
DisplayName = r.RuleCode,
Description = r.Description,
LegacyRuleCode = null
};
}
它们的属性名称不同,因此shouldbeeequivalentto()
或ShouldBeEquivalentTo()
不起作用
现在我正在手动/显式地比较它们:
foreach (var x in Enumerable.Zip(infs, rules, (i, r) => new { Info = i, Rule = r }))
{
x.Info.ShouldBeEquivalentTo(
new
{
RuleCode = x.Rule.RuleId,
DisplayName = x.Rule.RuleCode,
Description = x.Rule.Description,
LegacyRuleCode = (string)null
});
}
是否有更好、更紧凑、更不明确、更可读的方法?不幸的是,目前没有一种方法可以在比较不同类型时指定属性之间的映射。这件事是公开的 下面是一个关于比较两个集合的另一种方法的示例。 请注意,我假设
==
执行值相等。
因此,如果您的所有属性都是int
和string
,您就安全到家了
ruleInfos.Should().Equal(rules, (ruleInfo, rule) =>
ruleInfo.RuleCode == rule.RuleId
&& ruleInfo.DisplayName == rule.RuleCode
&& ruleInfo.Description == rule.Description
);
例如,对于没有重载=
的引用类型,您需要使用例如
(PropertyA == PropertyB) || (PropertyA?.Equals(PropertyB) == true
一个选项是将自定义等效步骤添加到全局选项配置:
class DifferentObjectsEquivalencyStep<T1, T2> : IEquivalencyStep {
private readonly Func<T1, T2> _converter;
public DifferentObjectsEquivalencyStep(Func<T1, T2> converter) {
_converter = converter;
}
public bool CanHandle(IEquivalencyValidationContext context, IEquivalencyAssertionOptions config) {
return context.Subject is T1 && context.Expectation is T2 || context.Subject is T2 && context.Expectation is T1;
}
public bool Handle(IEquivalencyValidationContext context, IEquivalencyValidator parent, IEquivalencyAssertionOptions config) {
var first = context.Subject is T1 ? (T1) context.Subject : (T1) context.Expectation;
var second = context.Subject is T2 ? (T2) context.Subject : (T2) context.Expectation;
second.ShouldBeEquivalentTo(_converter(first));
return true;
}
}
谢谢你的回答!我从中更多地了解了faapi。刚发现乔纳斯的答案很短:)
AssertionOptions.AssertEquivalencyUsing(c => c.Using(
new DifferentObjectsEquivalencyStep<Rule, RuleInfo>(CreateRuleInfo)));
rule.ShouldBeEquivalentTo(info);