test_dir: Run all tests in a directory

Description

This function is the low-level workhorse that powers test_local() and test_package(). Generally, you should not call this function directly. In particular, you are responsible for ensuring that the functions to test are available in the test env (e.g. via load_package).

See vignette("special-files") to learn more about the conventions for test, helper, and setup files that testthat uses, and what you might use each for.

Usage

test_dir(
  path,
  filter = NULL,
  reporter = NULL,
  env = NULL,
  ...,
  load_helpers = TRUE,
  stop_on_failure = TRUE,
  stop_on_warning = FALSE,
  wrap = lifecycle::deprecated(),
  package = NULL,
  load_package = c("none", "installed", "source")
)

Value

A list (invisibly) containing data about the test results.

Arguments

path

Path to directory containing tests.

filter

If not NULL, only tests with file names matching this regular expression will be executed. Matching is performed on the file name after it's stripped of "test-" and ".R".

reporter

Reporter to use to summarise output. Can be supplied as a string (e.g. "summary") or as an R6 object (e.g. SummaryReporter$new()).

See Reporter for more details and a list of built-in reporters.

env

Environment in which to execute the tests. Expert use only.

...

Additional arguments passed to grepl() to control filtering.

load_helpers

Source helper files before running the tests?

stop_on_failure

If TRUE, throw an error if any tests fail.

stop_on_warning

If TRUE, throw an error if any tests generate warnings.

wrap

DEPRECATED

package

If these tests belong to a package, the name of the package.

load_package

Strategy to use for load package code:

"none", the default, doesn't load the package.
"installed", uses library() to load an installed package.
"source", uses pkgload::load_all() to a source package. To configure the arguments passed to load_all(), add this field in your DESCRIPTION file:
```
Config/testthat/load-all: list(export_all = FALSE, helpers = FALSE)
```

Environments

Each test is run in a clean environment to keep tests as isolated as possible. For package tests, that environment inherits from the package's namespace environment, so that tests can access internal functions and objects.