How to start a new package with testing in R

May 30, 2019
By

(This article was first published on triKnowBits, and kindly contributed to R-bloggers)

# Navigate where you want your folder to be located
setwd(“C:/Users/chief/Documents/Github”)
# Assumes usethis is installed
usethis::create_package(“foo”)
# Say yes or no to next (annoying) popup window, it doesn’t matter.
# Add a test environment
setwd(“foo”)
usethis::use_testthat()
# Add first test function to at least get something in that folder.
# Go to foo\tests\testthat
# and add this file.
context(“foo”)
library(foo)
test_that(“I’m testing something”, {
  # do something with your code
  expect_equal(1:4, 1:4)
})


# Done

# Don’t forget!
# The only thing roxygen doesn’t handle is, 
# whenever you add new functionality from another package, 
# you have have to change DESCRIPTION.

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