Returns a *list* of one or more existing test directories suitable for normalization and use in subsequent mapping (e.g., `get_source_test_mapping_nstf`). Designed to work with:
get_biocgenerics_test_paths(test_pkg_data, testdir)named list of **existing** directories (e.g., `bioc_unitTests`, `tests_root`); if nothing is found, returns a single `fallback` entry pointing to `testdir`.
list/env of test metadata; may include: - `bioc_run_ut_path` (character): path to `tests/run_unitTests.R` wrapper, if present
character: expected RUnit tests directory (typically "<pkg_root>/inst/unitTests")
path <- as.character(pkg_source_path) testdir <- file.path(path, "inst/unitTests") test_path_list <- find_biocgenerics_test_paths(test_pkg_data, testdir) test_path <- normalizePath( unlist(test_path_list, use.names = TRUE), winslash = "/", mustWork = FALSE )