add naive test · mapleFU/arrow@fda14a4

file=tests/testthat/test-extra-package-roundtrip.R,line=27,col=85,[trailing_whitespace_linter] Trailing whitespace is superfluous.

file=tests/testthat/test-extra-package-roundtrip.R,line=49,col=55,[trailing_whitespace_linter] Trailing whitespace is superfluous.

file=tests/testthat/test-extra-package-roundtrip.R,line=53,col=55,[trailing_whitespace_linter] Trailing whitespace is superfluous.

file=tests/testthat/test-extra-package-roundtrip.R,line=68,col=19,[assignment_linter] Use <-, not =, for assignment.

file=tests/testthat/test-extra-package-roundtrip.R,line=68,col=19,[infix_spaces_linter] Put spaces around all infix operators.

file=tests/testthat/test-extra-package-roundtrip.R,line=85,col=5,[commented_code_linter] Commented code should be removed.

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