MSTest V2集合断言带有忽略大小写

Question

有什么方法可以使用MSTestV2在忽略大小写比较的情况下对集合进行断言？

例如，使用NUnit 3断言，我可以这样做：

Assert.That(subset, Is.SubsetOf(superset).IgnoreCase, missingColumnsMessage);

Answer 1

好的，这是可能的解决方案：

public static void IsSubset(this CollectionAssert assert, 
        ICollection<string> subset, ICollection<string> superset, 
        string message = null, IEqualityComparer<string> comparer = null)
    {
        var diff = subset.Except(superset, comparer ?? StringComparer.CurrentCulture).ToList();
        if (diff.Any())
        {
            var msg = message 
                      ?? $"These values are missing in the superset: {string.Join(", ", diff)}";
            throw new AssertFailedException(msg);
        }
    }

用法：

CollectionAssert.That.IsSubset(subset, superset, "Failed!", 
            StringComparer.InvariantCultureIgnoreCase);