Improving Firebase tests coverage. Addressing missing functions #54

Job	Run time
Calculate Version	21s
Build and Test (9.0.x, net9.0, ubuntu-latest)	46s
Build and Test (9.0.x, net9.0, windows-latest)	1m 41s
Build and Test (8.0.x, net8.0, ubuntu-latest)	54s
Build and Test (8.0.x, net8.0, windows-latest)	1m 57s
Publish Pre-release Packages (CI/CD) / Pack and Publish Packages	50s
Publish Pre-release Packages (CI/CD) / summary	3s
summary	2s
Clean Old Pre-release Packages / clean	8s
	6m 42s

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