# tests/testthat/setup.R — env sanitisation + seed discipline.

# Deterministic RNG across tests. Seed pinned to 2026L to match paper
# replication bundle.
set.seed(2026L, kind = "default", normal.kind = "default",
         sample.kind = "default")

# Locale sanitisation — number formatting and string collation must be
# deterministic across machines to keep vdiffr + snapshot tests stable.
tryCatch({
  Sys.setlocale("LC_COLLATE", "C")
  Sys.setlocale("LC_NUMERIC", "C")
  Sys.setlocale("LC_TIME",    "C")
}, error = function(e) invisible(NULL))

# Env-var sanitisation — clear anything that could influence knitr,
# rmarkdown, future.apply, or tinytex during test runs.
Sys.unsetenv(c(
  "R_CHECK_LENGTH_1_LOGIC2",
  "R_CHECK_LENGTH_1_CONDITION",
  "KNITR_IN_PROGRESS",
  "RMARKDOWN_PREVIEW_DIR"
))

# Disable parallelism in tests unless a specific test opts in.
# (future.apply respects options(future.plan = "sequential").)
options(future.plan = "sequential")

# vdiffr snapshot directory lives under tests/testthat/_snaps/ (default).