add test folder with simple testthat scripts for the four main functions

.DS_Store

extdata/.DS_Store

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...ancm_fvb_x_fancm_bl6_exon2_875--_VT_001-crop-1-SYCP3.jpeg

...fancm_fvb_x_fancm_bl6_exon2_875--_VT_002-crop-2-DAPI.jpeg

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...fancm_fvb_x_fancm_bl6_exon2_875--_VT_003-crop-3-DAPI.jpeg

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...fancm_fvb_x_fancm_bl6_exon2_875--_VT_006-crop-5-DAPI.jpeg

...fancm_fvb_x_fancm_bl6_exon2_875--_VT_006-crop-5-MLH3.jpeg

...ancm_fvb_x_fancm_bl6_exon2_875--_VT_006-crop-5-SYCP3.jpeg

...fancm_fvb_x_fancm_bl6_exon2_875--_VT_007-crop-6-DAPI.jpeg

...fancm_fvb_x_fancm_bl6_exon2_875--_VT_007-crop-6-MLH3.jpeg

...ancm_fvb_x_fancm_bl6_exon2_875--_VT_007-crop-6-SYCP3.jpeg