Add unit test to look at the bug #325 #7

All 180 tests pass in 0s

180 tests +93 180 ✔️ +93 0s ⏱️ ±0s
    1 suites ±  0     0 💤 ±  0
    1 files ±  0     0 ❌ ±  0

Results for commit 3d5259c. ± Comparison against earlier commit df56e84.