String .BeEquivalentTo() is case-sensitive on linux

It seems that BeEquivalentTo() doesn’t ignore case when comparing strings on Linux environment.

"SomeString".Should().BeEquivalentTo("somestring");

Expected: verification passes.

It works as expected on Windows, but throws but "SomeString" differs near "Som" (index 0) exception on Linux.

On the same environment string assertion from NUnit framework works as expected.

StringAssert.AreEqualIgnoringCase("SomeString", "somestring");

Info:

• FluentAssertions v5.7.0
• .netcoreapp 2.1

[jnyrup]

I wouldn’t mind including the extra xunit code. It could maybe combine it with [CollectionDefinition] to disable parallelization for those tests mingling with the CurrentCulture, see an example in AssertionOptionSpecs.cs

[eNeRGy164]

You could switch to StringComparison.OrdinalIgnoreCase explicitly for comparisons

You mean in FA?

Yeah, I find it strange that about half of the StringAssertions use Ordinal, and half use CurrentCulture. It is probably a breaking change. But having code be asserted differently depending on your machine is also not expected I guess.