Improve readability of language test results

[tsaglam]

This PR improves the readability of the language module test results:

• Display names are used for test categories
• Token sequences are compared via assertLinesMatch for improved readability in case of failures (see Improve test result visualization for the view file tests #1144)
• test files are displayed via their names instead of paths
• JUnit wording "expected"/"actual" is used in favor of "required"/"extracted"

[TwoOfTwelve]

Looks good to me.

The only thing that seems a little of, is that we are now comparing strings instead of enum instances, but I agree that the better output of assertLinesMatch is worth it.

[tsaglam]

The only thing that seems a little off, is that we are now comparing strings instead of enum instances, but I agree that the better output of assertLinesMatch is worth it.

Yeah, that is a bit off. I could add a second assertion after the first one where we compare the token directly, then we always have that as a fallback.

[sonarqubecloud]

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