Testthat

testthat 3.3.0

testthat 3.3.0 brings improved expectations with better error messages, new expectations for common testing patterns, and lifecycle changes including the removal of `local_mock()` and `with_mock()`. It also includes a write-up of my experience doing package development with Claude Code

Hadley Wickham

testthat 3.2.0

Catch up on the last two years of testthat development which includes improved documentation, new expectations, a new style for error snapshots, support for mocking, a new way to detect if a test has changed global state, and a handful of UI improvements

Hadley Wickham

Upgrading to testthat edition 3

A workflow for upgrading to testthat edition 3: activation, deprecations, changes to warnings, messages, and comparisons

Hannah Frick

testthat 3.1.0

testthat 3.1.0 brings improvements to snapshot testing and one breaking change

Hadley Wickham

waldo 0.3.0

waldo 0.3.0 improves the display of data frame differences, and gives the objects being compared the ability to control the detail of their comparisons

Hadley Wickham

vdiffr 1.0.0

This major release of vdiffr includes an updated SVG engine and integrates with the snapshot management mechanism of testthat 3

Lionel Henry

testthat 3.0.0

testhat 3.0.0 brings a raft of major improvements including snapshot testing and parallel testing. It also includes a new "edition" that allows you opt-in to a set of substantial improvements that are not backward compatible

Hadley Wickham

waldo

waldo is a new package that makes it easier to see the differences between a pair of complex R objects

Hadley Wickham

testthat 2.3.0

Hadley Wickham

testthat 2.1.0

Highlights include that `context()` is now optional, and new `expect_invisible()` and `expect_mapequal()` expectations

Hadley Wickham

testthat 2.0.0

Hadley Wickham

Hadley Wickham | testthat 3.0.0 | RStudio (2020)

In this webinar, I'll introduce some of the major changes coming in testthat 3.0.0. The biggest new idea in testthat 3.0.0 is the idea of an edition. You must deliberately choose to use the 3rd edition, which allows us to make breaking changes without breaking old packages. testthat 3e deprecates a number of older functions that we no longer believe are a good idea, and tweaks the behaviour of expect_equal() and expect_identical() to give considerably more informative output (using the new waldo package). testthat 3e also introduces the idea of snapshot tests which record expected value in external files, rather than in code. This makes them particularly well suited to testing user output and complex objects. I'll show off the main advantages of snapshot testing, and why it's better than our previous approaches of verify_output() and expect_known_output(). Finally, I'll go over a bunch of smaller quality-of-life improvements, including tweaks to test reporting and improvements to expect_error(), expect_warning() and expect_message(). Webinar materials: https://rstudio.com/resources/webinars/testthat-3/ About Hadley: Hadley Wickham is the Chief Scientist at RStudio, a member of the R Foundation, and Adjunct Professor at Stanford University and the University of Auckland. He builds tools (both computational and cognitive) to make data science easier, faster, and more fun. You may be familiar with his packages for data science (the tidyverse: including ggplot2, dplyr, tidyr, purrr, and readr) and principled software development (roxygen2, testthat, devtools, pkgdown). Much of the material for the course is drawn from two of his existing books, Advanced R and R Packages, but the course also includes a lot of new material that will eventually become a book called "Tidy tools"

Hadley Wickham