Improve test coverage by implementing positive scenario for convertin… #572

Job	Run time
init / run	20s
build-test-pack (AutoFakeItEasy) / run	1m 55s
build-test-pack (AutoMoq) / run	1m 29s
build-test-pack (Core) / run	1m 26s
build-test-pack (AutoNSubstitute) / run	1m 32s
publish	0s
tag	0s
	6m 42s

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