Sort an array

[drpaneas]

Dev story
Write a function/method that sorts an array in a similar way with the Linux command sort

Example:

sortedArray := sort(unsortedArray)

Acceptance Criteria

• Use https://github.com/spf13/afero for filesystem abstraction
• Make sure it works cross-platform
• Put the function into internal/utils package
• For logging use https://github.com/Sirupsen/logrus
• Write a unit test
• Make sure there are testable examples

Hints:

• Writing a unit test for filesystem checking is not trivial. You should NOT create a real file on the system, because then your test will depend on the I/O of the file system itself. The last resort is mocking the filesystem. There are quite a few powerful libraries like spf13/afero for this purpose (mocking of a filesystem). These packages will create temporary files in the background and clean up afterward.
• As an exercise, try to write the test first. Let it fail. Then try to fix it, by writing the actual implementation of the function.

Extra Help:

• https://golangcode.com/check-if-a-file-exists/
• https://www.youtube.com/watch?v=ifBUfIb7kdo
• https://github.com/spf13/afero#using-afero-for-testing
• An example using Afero for testing: http://krsacme.com/golang-fs-tests/
• For logging https://linuxhint.com/golang-logrus-package/

NOTICE: If you are unable to mock this test, in worst case scenario, create a folder internal/utils/testdata and put actual files you can use for your test.

[zoispag]

See "sort" package