> GitHub Actions > Add Data Checks

Add Data Checks

Modify the .R scripts in the testthat folder to automatically check your data for errors. GitHub Actions will automatically run any R script files inside the testthat folder. For example, copy this script into testthat/test-periods-ga.R. It will automatically make sure that the sampling period values in your data are plausible.

library(testthat)
library(dplyr)
library(readr)
context("Checks that all values in period variable are valid.")
   
base_data <- read_csv("../data-raw/data.csv")
   
test_that(
  desc = "Period values are valid.",
  code = {
    all_period_values_valid <- all(base_data$period < 1000)
    expect_true(all_period_values_valid)
  }
)

In .github/workflows/R-CMD-check.yaml add the following code at the end of the file, being once again mindful of the spacing at the beginning of each line
```
      - name: Run tests
        run: Rscript testthat.R
```
Add, commit, push, and double-check that your changes are now on GitHub:
GitHub actions will automatically run your tests. If there are errors, the build will fail. Check to see that your tests have passed: