added important PImage unit tests (#1049) #269

Job	Run time
Test Processing	3m 53s
(linux/x64) Create Processing Build	4m 31s
(windows/x64) Create Processing Build	7m 34s
(macos/aarch64) Create Processing Build	4m 51s
(linux/aarch64) Create Processing Build	3m 28s
(macos/x64) Create Processing Build	4m 55s
	29m 12s

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