Run a collection of tests

Run transformations on all *-in.R files in a test directory and compare them with their *-out.R counterpart.

test_collection(test, sub_test = NULL, write_back = TRUE,
  write_tree = NA, transformer, ...)

Arguments

test	The test to run. It corresponds to a folder name in tests/testthat.
sub_test	A regex pattern to further reduce the amount of test files to be tested in the test. sub_test must match the beginning of file names in tests/testthat. NULL matches all files.
write_back	Whether the results of the transformation should be written to the output file.
write_tree	Whether or not the tree structure of the test should be computed and written to a file. Note that this needs R >= 3.2 (see set_arg_write_tree()). If the argument is set to NA, the function determines whether R >= 3.2 is in use and if so, trees will be written.
transformer	A function to apply to the content of in_item.
...	Parameters passed to transformer function.

Details

Each file name that matches test and sub_test and ends with "-in.R" is considered as an input to test. Its counterpart, the reference to compare it against is the *-out.R file. It is constructed by taking the substring of the *-in.R file before the last dash and adding -out.R. In contrast to older versions of this function, every *-out.R file has just one in file.