load_base_r_packages_into_env: Load Base R packages into an isolated coverage environment

In test.assessr: Assessing Package Test Reliability and Quality

Load Base R packages into an isolated coverage environment

Description

Populate an isolated environment (typically created with 'new.env(parent = baseenv())') with objects needed to mimic the standard Base R package surface during coverage or test evaluation.

Usage

load_base_r_packages_into_env(env, overwrite = FALSE)

Arguments

env	An environment to populate.
overwrite	Logical; if 'TRUE', overwrite objects already present in 'env'. If 'FALSE' (default), existing objects are left unchanged.

Details

The 'base' package itself is already available via 'baseenv()' and is therefore not copied into 'env'. The function instead:

- loads datasets from the 'datasets' package into 'env', and - copies exported objects from other Base R packages into 'env' (e.g. 'stats', 'utils', 'graphics', 'grDevices', 'methods', etc.).

This is useful when tests are evaluated in a deliberately isolated environment whose parent is 'baseenv()', because objects from packages such as 'stats' (e.g. 'rnorm') and 'datasets' (e.g. 'mtcars', 'iris') are not automatically visible there.

The Base R package set handled here is:

• 'base'

• 'compiler'

• 'datasets'

• 'graphics'

• 'grDevices'

• 'grid'

• 'methods'

• 'parallel'

• 'splines'

• 'stats'

• 'stats4'

• 'tcltk'

• 'tools'

• 'utils'

Because 'base' is already reachable through 'baseenv()', it is excluded from the explicit copy step.

Value

A named list with two character vectors:

exports_loaded

Exported objects copied from Base R packages other than 'base' and 'datasets'.

datasets_loaded

Dataset objects loaded from the 'datasets' package.

test.assessr documentation built on April 30, 2026, 5:06 p.m.