Tests

States' functions improvements #88

Job	Run time
Tests (1, macos-latest) / Tests	9m 21s
Tests (1, ubuntu-latest) / Tests	15m 13s
Tests (1, windows-latest) / Tests	20m 36s
Tests (lts, macos-latest) / Tests	7m 28s
Tests (lts, ubuntu-latest) / Tests	11m 28s
Tests (lts, windows-latest) / Tests	16m 14s
Tests (pre, macos-latest) / Tests	8m 51s
Tests (pre, ubuntu-latest) / Tests	12m 44s
Tests (pre, windows-latest) / Tests	18m 35s
	2h 0m 30s

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