Using tinytest within a testing function

Question

I use tinytest to test a package. As I am testing multiple similar inputs with the same expected results, I created a small test-helper-function within the test_*.R file.

However, if a test failed, I do not get the typical failed notification. For example, in the following function, I would expect to get a summary or a direct failure but instead it returns

library(tinytest)

test_function <- function() {
  expect_equal(1, 1)
  expect_equal(2, 1)
  expect_equal(1, 1)
}

test_function()
#> ----- PASSED      : <-->
#>  call| test_function()

Note that if I replace tinytest with testthat the function stops and returns an error as expected.

Is this expected behavior or what did I miss when reading the documentation and how can I use tinytest within such a testing function?

David · Accepted Answer · 2021-01-08 06:48:13Z

1

So what I was able to gather is that your test_function() is returning the result of the last expect_equal() inside the function. Which means if you change the last expect_equal(1, 1) to expect_equal(2, 1) or any other false result, the test_function will return FAILED results.

Now if you want to fetch the results of each expect_eqaul() inside your function, you can try this:

library(tinytest)
test_function <- function(){
    Results <- c(expect_equal(1, 1),expect_equal(2, 1),expect_equal(1, 1))
    return(Results)
}
test_function()

This will give you a list of Boolean Values as a result.

> test_function()
[1]  TRUE FALSE  TRUE

or to test if all tests where positive:

> expect_true(all(test_function()))
----- FAILED[data]: <-->
call| expect_true(all(test_function()))
diff| Expected TRUE, got FALSE

edited Jan 8, 2021 at 6:48

David

10.5k5 gold badges55 silver badges97 bronze badges

answered Jan 7, 2021 at 21:05

itsDV7

8547 silver badges12 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

David Over a year ago

This is a good workaround (haven't actually thought about returning the result values), but unfortunately this does not inform me on which test has failed (compared to testthat). Thanks for your answer nonetheless!

Collectives™ on Stack Overflow

Using tinytest within a testing function

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related