R: Watches code and tests for changes, rerunning tests as...

auto_test {testthat} | R Documentation

## Watches code and tests for changes, rerunning tests as appropriate.

### Description

The idea behind `auto_test()` is that you just leave it running while you develop your code. Everytime you save a file it will be automatically tested and you can easily see if your changes have caused any test failures.

### Usage

    auto_test(code_path, test_path, reporter = default_reporter(),
      env = test_env(), hash = TRUE)

### Arguments

`code_path` | path to directory containing code
`test_path` | path to directory containing tests
`reporter` | test reporter to use
`env` | environment in which to execute test suite.
`hash` | Passed on to `watch()`. When FALSE, uses less accurate modification time stamps, but those are faster for large files.

### Details

The current strategy for rerunning tests is as follows:

- if any code has changed, then those files are reloaded and all tests rerun

- otherwise, each new or modified test is run

In the future, `auto_test()` might implement one of the following more intelligent alternatives:

- Use codetools to build up dependency tree and then rerun tests only when a dependency changes.

- Mimic ruby's autotest and rerun only failing tests until they pass, and then rerun all tests.

### See Also

`auto_test_package()`

[Package testthat version 2.1.1 Index]