check_empty_beautier_folder()
# TRUE
are_fasta_filenames("1.fas")
are_fasta_filenames("1.fasta")
are_fasta_filenames("1.FAS")
are_fasta_filenames("1.FASTA")
are_fasta_filenames(c("1.fas", "2.fas"))
# FALSE
are_fasta_filenames("")
are_fasta_filenames(NA)
are_fasta_filenames(NULL)
are_fasta_filenames(Inf)
are_fasta_filenames("1.fasX")
are_fasta_filenames(c("1.fas", "2.exe"))
are_fasta_filenames(c("1.bat", "2.exe"))
check_empty_beautier_folder()
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