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httptest2 makes it easy to write tests for code and packages that wrap web APIs. Testing code that communicates with remote servers can otherwise be painful: things like authentication, server state, and network flakiness can make testing seem too costly to bother with. The httptest2 package enables you to test all of the logic on the R sides of the API in your package without requiring access to the remote service.
Importantly, it provides contexts that mock the network connection and tools for recording real requests for future offline use as fixtures, both in tests and in vignettes. The package also includes additional expectations to assert that HTTP requests were—or were not—made.
Using these tools, you can test that code is making the intended requests and that it handles the expected responses correctly, all without depending on a connection to a remote API. The ability to save responses and load them offline also enables you to write package vignettes and other dynamic documents that can be distributed without access to a live server.
This package is an adaptation of httptest to work with httr2. Most features work exactly as they do in httptest; see the NEWS.md for the initial release for a summary of what has changed.
httptest2 can be installed from CRAN with
The pre-release version of the package can be pulled from GitHub using the remotes package:
To start using httptest2 with your package, run use_httptest2() in the root of your package directory. This will
httptest2 to “Suggests” in the DESCRIPTION filelibrary(httptest2) to tests/testthat/setup.R, which testthat loads before running testsThen, you’re ready to start using the tools that httptest2 provides. For an overview of how to get started, see vignette("httptest2"), and check out vignette("faq") for some common questions. See also the package reference for a list of all of the test contexts and expectations provided in the package.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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