add test hex2byte and methods#5

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JuliaRecalde wants to merge 9 commits intofintechworks:masterfrom

JuliaRecalde:jrecalde-advance1

Commits on May 24, 2023

add test and method
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Commits on May 25, 2023

add test and method
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Commits on May 26, 2023

agg methods isHexadecimal2 and isDigitHexadecimal
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Commits on May 29, 2023

modify method hex2byte
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Commits on May 30, 2023

Commits on May 31, 2023

agg test ValidInput and InvalidInput
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Merge branch 'jrecalde-advance' of https://github.com/JuliaRecalde/jPOS into jrecalde-advance
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Commits on Jun 13, 2023

modify test valid and invalid
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