All PRs go into a side branch (right now v0.1.1), not in main directly. I fixed this, but make sure you select the other branch next time.
You are pushing from an unclean branch, it has bits and pieces from raking. Only the lines of tests are required.
@itsdebartha started PR #278, and these tests are an addition to that. You can checkout and commit directly from his branch/PR. For now, I have manually copied the tests from here into the other PR
Added ratio test with simple random sampling design. referred to #253