Feature request: add ability to include tests within the same file as the source code.

[avhz]

Bit of a long shot, but I was wondering if there would be any interest in adding the ability to include unit tests within the same file as the source code, instead of relying on tests/testthat for all tests (unit + integration).

Something along these lines:

## R/f1.R

f1 <- function() return(1:3)

testthat::expect_equal(f1(), c(1, 2, 3))

## R/f2.R

f2 <- function() return(letters[1:3])

testthat::expect_equal(f2(), c("a", "b", "c"))

This means tests/testthat could be reserved for integration tests, and unit tests are "closer" to the code.

The closest I can get to this is to just have assertions within documentation.

We would somehow need to hide the tests from being run when the package is built, etc.

[maelle]

Do you know about https://github.com/mikldk/roxytest?

[avhz]

I do

[hadley]

This is an interesting idea, but not something that's in scope for testthat, sorry.