Use of strings 'foo' and 'bar' in test fixtures acceptable?

[michielbdejong]

@pmcb55 related to inrupt/wac-ldp#174 I found that some of our tests here use the strings 'foo' and 'bar', e.g. https://github.com/inrupt/solid-server-ts/blob/master/test/unit/http/TargetExtractor.ts#L22

As we know these strings are fundamentally (supposed to be) undescriptive. Is that OK with you, or would you prefer if we change all occurrences of /foo/bar to e.g. /some-folder/some-file?