httptest 3.1.0 2018-06-19

Better, more efficient response recording

  • capture_requests() no longer includes the “request” object inside the recorded response when writing .R verbose responses. As of 3.0.0, with_mock_api() inserts the current request when loading mock files, so it was being overwritten anyway. This eliminates some (though not all) of the need for redacting responses. As a result, the redacting functions redact_oauth() and redact_http_auth() have been removed because they only acted on the response$request, which is now dropped entirely.
  • capture_requests() will record simplified response bodies for a range of Content-Types when simplify=TRUE (the default). Previously, only .json (Content-Type: application/json) was recorded as a simple text files; now, .html, .xml, .txt, .csv, and .tsv are supported.
  • When recording with simplify=TRUE, HTTP responses with 204 No Content status are now written as empty files with .204 extension. This saves around 2K of disk space per file.
  • with_mock_api() now can also load these newly supported file types.
  • Bare JSON files written by capture_requests() are now “prettified” (i.e. multiline, nice indentation).
  • capture_requests() now records responses from httr::RETRY() (#13)

Vignette setup and teardown

  • Store package-level vignette setup and teardown code, called inside start_vignette() and end_vignette(), in inst/httptest/start-vignette.R and inst/httptest/end-vignette.R, respectively. Like with the package redactors and request preprocessors, these are automatically executed whenever your package is loaded and start/end_vignette is called. This makes it easy to write multiple vignettes without having to copy and paste as much setup code. See vignette("vignettes") for details.

Other enhancements and options

  • gsub_response() now applies over the URL in a Location header, if found.
  • Add options(httptest.max.print) to allow you the ability to specify a length to which to truncate the request body printed in the error message for requests in with_mock_api(). Useful for debugging mock files not found when there are large request bodies.
  • Add options(httptest.debug), which if TRUE prints more details about which functions are being traced (by base::trace()) and when they’re called.
  • Deprecate the “verbose” argument to capture_requests(): use options(httptest.verbose) instead.

httptest 3.0.0 2018-01-16

Major features

  • Write vignettes and other R Markdown documents that communicate with a remote API using httptest. Add a code chunk at the beginning of the document including start_vignette(). The first time you run the document, the real API responses are recorded to a subfolder in your vignettes directory. Subsequent vignette builds use these recorded responses, allowing the document to regenerate without a network connection or API credentials. If your document needs to handle changes of server state, as when you make an API request that creates a record on the server, add a call to change_state(). See vignette("vignettes") for more discussion and links to examples.
  • Packages can now have a default redacting function, such that whenever the package is loaded, capture_requests() will apply that function to any responses it records. This ensures that you never forget to sanitize your API responses if you need to use a custom function. To take advantage of this feature, put a function (response) {...} in a file at inst/httptest/redact.R in your package. See the updated vignette("redacting", package="httptest") for more.
  • You can also now provide a function to preprocess mock requests. This can be particularly for shortening URLs—and thus the mock file paths—because of CRAN-mandated constraints on file path lengths (“non-portable file paths”). This machinery works very similar to redacting responses when recording them, except it operates on request objects inside of with_mock_api(). To use it, either pass a function (request) {...} to set_requester() in your R session, or to define one for the package, put a function (request) {...} in a file at inst/httptest/request.R. gsub_request() is particularly useful here. vignette("redacting", package="httptest") has further details.

Other big changes and enhancements

  • Standardize exported functions on snake_case rather than camelCase to better align with httr and testthat (except for .mockPaths(), which follows base::.libPaths()). Exported functions that have been renamed have retained their old aliases in this release, but they are to be deprecated.
  • use_mock_api() and block_requests() enable the request altering behavior of with_mock_api() and without_internet(), respectively, without the enclosing context. (use_mock_api is called inside start_vignette().) To turn off mocking, call stop_mocking().
  • Internal change: mocking contexts no longer use testthat::with_mock() and instead use trace().
  • capture_requests()/start_capturing() now allow you to call .mockPaths() while actively recording so that you can record server state changes to a different mock “layer”. Previously, the recording path was fixed when the context was initialized.
  • The redact argument to capture_requests()/start_capturing() is deprecated in favor of set_redactor(). This function can take a function (response) {...}; a formula as shorthand for an anonymous function with . as the “response” argument, as in the purrr package; a list of functions that will be chained together; or NULL to disable the default redact_auth().
  • redact_headers() and within_body_text() no longer return redacting functions. Instead, they take response as their first argument. This makes them more natural to use and chain together in custom redacting functions. To instead return a function as before, see as.redactor().
  • gsub_response() is a new redactor that does regular-expression replacement (via base::gsub()) within a response’s body text and URL.
  • .mockPaths() only keeps unique path values, consistent with base::.libPaths().
  • Option "httptest.verbose" to govern some extra debug messaging (automatically turned off by start_vignette())
  • Fix a bug where write_disk responses that were recorded in one location and moved to another directory could not be loaded

httptest 2.3.4 2017-11-14

  • Ensure forward compatibility with a change in deparse() in the development version of R (r73699).

httptest 2.3.2 2017-10-20

  • Add redact_oauth() to purge httr::Token() objects from requests (#9). redact_oauth() is built in to redact_auth(), the default redactor, so no action is required to start using it.

httptest 2.3.0 Unreleased

httptest 2.2.0 Unreleased

  • Add redacting functions (redact_auth(), redact_cookies(), redact_http_auth(), redact_headers(), within_body_text()) that can be specified in capture_requests() so that sensitive information like tokens and ids can be purged from recorded response files. The default redacting function is redact_auth(), which wraps several of them. See vignette("redacting", package="httptest") for more.
  • When loading a JSON mock response, the current “request” object is now included in the response returned, as is the case with real responses.
  • Remove the file size limitation for mock files loaded in with_mock_api()
  • skip_if_disconnected() now also wraps testthat::skip_on_cran() so that tests that require a real network connection don’t cause a flaky test failure on CRAN

httptest 2.1.2 2017-08-04

  • Fix for compatibility with upcoming release of httr that affected non-GET requests that did not contain any request body.

httptest 2.1.0 2017-07-31

  • with_mock_api() and without_internet() handle multipart and urlencoded form data in mocked HTTP requests.
  • buildMockURL() escapes URL characters that are not valid in file names on all R platforms (which R CMD check would warn about).
  • capture_requests() now has a verbose argument, which, if TRUE, prints a message with the file path where each captured request is written.
  • capture_requests() takes the first element in .mockPaths() as its default “path” argument. The default is unchanged since .mockPaths() by default returns the current working directory, just as the “path” default was, but if you set a different mock path for reading mocks, capture_requests() will write there as well.

httptest 2.0.0 2017-06-05

  • capture_requests() now writes non-JSON-content-type and non-200-status responses as full “response” objects in .R files. with_mock_api() now looks for .R mocks if a .json mock isn’t found. This allows all requests and all responses, not just JSON content, to be mocked.
  • New .mockPaths() function, in the model of .libPaths(), which allows you to specify alternate directories in which to search for mock API responses.
  • Documentation enriched and vignette("httptest") added.

httptest 1.3.0 2017-04-13

  • New context capture_requests() to collect the responses from real requests and store them as mock files
  • with_trace() convenience wrapper around trace/untrace
  • mockDownload() now processes request URLs as mock_request() does

httptest 1.2.0 2017-03-22

  • Add support in with_mock_api() for loading request fixtures for all HTTP verbs, not only GET (#4). Include request body in the mock file path hashing.
  • buildMockURL() can accept either a ‘request’ object or a character URL
  • Bump mock payload max size up to 128K

httptest 1.1.2 Unreleased

httptest 1.1.0 2017-02-03

  • expect_header() to assert that a HTTP request has a header
  • Always prune the leading “:///” that appears in with_mock_api() if the URL has a querystring

httptest 1.0.0 2016-12-31

  • Initial addition of functions and tests, largely pulled from httpcache and crunch.