Add tests for contigous masks #2525

Job	Run time
Check code formatting with ruff and mypy (3.8)	1m 21s
Check Readme is not outdated (3.8)	16s
Test and lint (ubuntu-latest, 3.8)	2m 22s
Test and lint (ubuntu-latest, 3.9)	6m 11s
Test and lint (ubuntu-latest, 3.10)	6m 3s
Test and lint (ubuntu-latest, 3.11)	6m 4s
Test and lint (ubuntu-latest, 3.12)	5m 54s
Test and lint (windows-latest, 3.8)	4m 33s
Test and lint (windows-latest, 3.9)	9m 34s
Test and lint (windows-latest, 3.10)	10m 20s
Test and lint (windows-latest, 3.11)	10m 16s
Test and lint (windows-latest, 3.12)	8m 38s
Test and lint (macos-latest, 3.8)	2m 2s
Test and lint (macos-latest, 3.9)	4m 46s
Test and lint (macos-latest, 3.10)	4m 35s
Test and lint (macos-latest, 3.11)	4m 34s
Test and lint (macos-latest, 3.12)	4m 39s
	1h 32m 8s

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