Use reusable method of locating test data

[jayvdb]

The following bears, and maybe others, all have test data, and have a function to 'find' the test data relative to __file__

• CPDBearTest
• DuplicateFileBearTest
• LicenseCheckBearTest A pytest specific way of doing this is https://pypi.python.org/pypi/pytest-datafiles . However that means other test runners, like green would not work. Simply migrating that algorithm to function in a base test class would suffice ; see https://github.com/coala/coala/issues/3676

[jayvdb]

If there isnt an existing re-usable approach, a new one should be added in a standard base class coala/coala#3676

[Makman2]

Yes definitely in for standardizing test folders. It's actually not so complicated to find stuff, but it definitely helps and adds one definite way how to handle this. :+1:

[Makman2]

For an approach: I think we can orientate on many tests which have a load_testdata-function, which loads a file relative to a directory located in the same directory as the test. So if somebody wants test files:

1. Create a directory with a certain pattern, like <TestFileName> or <TestFileName>TestFiles
2. Place test-files inside
3. Use load_testdata

[Mixih]

assigned per GSoC project "Improve Linter Bears"