Observational Health Data Sciences and Informatics

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OHDSI unit testing for R follows the standard R practice using test_that: A folder named 'tests' is created in the root of the package, and this folder contains

• A sub-folder called 'testthat`
• A file called 'testthat.R'

The file 'testthat.R' should have the following content:

library(testthat)
library(<package name>)
test_check("<package name>")

The sub-folder 'testthat` should contain one or more R scripts whose file name starts with 'test-' (e.g. 'test-connection.R'. Each file should contain one or more `test_that` blocks, for example

test_that("Function x returns 2", {
  expect_equal(x(), 2)
})