add unit tests for IntList (#1102) #267

Job	Run time
Test Processing	3m 36s
(windows/x64) Create Processing Build	8m 46s
(linux/aarch64) Create Processing Build	3m 25s
(macos/x64) Create Processing Build	5m 4s
(macos/aarch64) Create Processing Build	5m 20s
(linux/x64) Create Processing Build	4m 22s
	30m 33s

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