externalize functions for easier testing #1613

All 265 tests pass, 5 skipped in 10s

    1 files ±0     1 suites ±0 10s ⏱️ ±0s
270 tests ±0 265 ✔️ ±0 5 💤 ±0 0 ❌ ±0
273 runs ±0 268 ✔️ ±0 5 💤 ±0 0 ❌ ±0

Results for commit 6c939d5. ± Comparison against earlier commit ce5fce8.