Clever Geek Handbook

Run unit tests with testthat without packaging

I have a brilliant app that uses both 4 functions. I would like to test these features, but this is not a package. How should I structure my code? and run these tests without devtools?

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You can run tests with testthat::test_dir()

or testthat::test_file()

. None of them depend on the code in the package, or using devtools, only testthat .

There are several requirements for structuring your code. If it were me, I would create a directory tests

and add test scripts there, which would look something like this:

|- my_shiny_app | |- app.R | |- tests | |- test_foo.R | |- test_bar.R



Then you can run tests with test_dir('tests')

if you are in the directory my_shiny_app

.

In your test scripts, they will have the same structures that they have for packages , but you would replace the invocation with the library()

link in the source()

file in which your functions are defined.

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If you have multiple functions without a package structure, it is better to write individual test files manually (for example, with a simple if / errors checking system) that you invoke with Rscript test_file1.R

.



If you start using the package format instead (which would be useful for future "safe" development) and you still don't want to use testthat

, I advise you to follow this blog post: here

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