assertthat

Overview

About

Maintained by Hadley WickhamFirst published 2013-12-063 releasesCRAN page ↗

An extension to stopifnot() that makes it easy to declare the pre and post conditions that you code should satisfy, while also producing friendly error messages so that your users know what's gone wrong.

Install

R (CRAN)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("assertthat", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-assertthat

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-assertthat

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-assertthat

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 55 s · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.50

81.6%

Coverage · measured lines

88%

Documentation · exports

1

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 397 wordsVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 91%
Return-value docs: 9%
References docs: 0%

Downloads

2.9M

CRAN downloads in the past year

Rank #251 · ~8K/day · ~242.7K/mo

Releases R versions

Daily download trend is not available in this view yet.

161.1K30 days

560.3K90 days

2.9M1 year

Compare downloads with other packages →

Also on39.5K r2u138 autocran1.1M conda_forge343 c2d4u

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (1)

tools

LinkingTo (0)

none

Suggests (2)

testthat covr

Enhances (0)

none

Dependency license breakdown →

Code & Tests

Code Composition

R 941 (69%)Rd 415 (31%)

Code characteristics

Cyclomatic complexity: 1.0 median / 4 max
Test cases: 27 / 0.50 per code line

Test coverage

Line coverage

82%

Expression

85.1%

Tests / Examples

81.6% / 79% ex

Functions

58 24 exported

Complexity

1.4 avg / 4 max

Call network

58 nodes / 18 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

58 functions

Function	Cyclo	Coverage
is_not	1	0%
logical_is_not	1	0%
path_is_not	1	0%
check_result	4	57%
get_message	3	88%
see_if exp	4	92%

People & History

People (1)

Maintainer (1)

Hadley Wickham

Author, Maintainer

Authors (1)

Hadley Wickham

Author, Maintainer

Package Timeline

3 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
0.2.1Latest
2019-03-21 · current release · diff ↗
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
0.2.0
2017-04-11 · diff ↗
R
R 3.3.0 released · 2016-05-03
R
R 3.2.0 released · 2015-04-16
R
R 3.1.0 released · 2014-04-10
0.1
2013-12-06

Show 1 earlier events

R
R 3.0.0 released · 2013-04-03

Package metadata

First published: 2013-12-06
Total releases: 3 / 13 yrs
License: GPL-3 OSI
Download size: 12 KB
Installed size: not tracked yet
With dependencies: not tracked yet