Use the function testthat::expect_equal to check if the output of the report_p() function with different p values and the default digits value gives you the expected output.

If you have not, install them now and restart R. Make sure you have installed the RMarkdown and postcards package.

Now add another testthat::test_that block called 'default values'. Start a new project in RStudio from this github repo (New project > Version Control) Add a photo of you which you’d like to use in your website to the project (jpg or png formats are just fine). You should see output like: Loading demopckg You can test more values than these, but we'll start with just these two.Īfter you save this file, run devtools::test(). Step 1: Set up your packages and directory To create your own R package, you will need to use two packages, devtools and roxygen2. We're going to check two expectations, that we'll get the error message 'p cannot be less than 0' if p = -1, and that we'll get the error message 'p cannot be greater than 1' id p = 2. The first set we're going to make checks if we get the error messages we expect, so we've called it 'errors'. The test_that function checks a groups of expectataions. The context function lets you know what function you're testing when you run all the unit tests in a package.

B.2.2 Enable version control in RStudio In the beginning this will probably be a console application.

Create your own r package