Requests are translated to mock file paths according to several rules that incorporate the request method, URL, query parameters, and body.
build_mock_url(req, method = "GET")A file path and name, without an extension. The file, or a file with some extension appended, may or may not exist: existence is not a concern of this function.
A request object, or a character "URL" to convert
character HTTP method. If req is a 'request' object,
its request method will override this argument
First, the request protocol, such as "https://", is removed from the URL.
Second, if the request URL contains a query string, it will be popped off,
hashed by digest::digest(), and the first six characters appended to the
file being read. Third, request bodies are similarly hashed and
appended. Finally, if a request method other than GET is used it will be
appended to the end of the end of the file name.
Mock file paths also have a file extension appended, based on the
Content-Type of the response, though this function, which is only concerned
with the request, does not add the extension. In an
HTTP API, a "directory" itself is a resource,
so the extension allows distinguishing directories and files in the file
system. That is, a mocked GET("http://example.com/api/") may read a
"example.com/api.json" file, while
GET("http://example.com/api/object1/") reads "example.com/api/object1.json".
Other examples:
GET("http://example.com/api/object1/?a=1") may read
"example.com/api/object1-b64371.xml".
POST("http://example.com/api/object1/?a=1") may read
"example.com/api/object1-b64371-POST.json".
This function is exported so that other packages can construct similar mock
behaviors or override specific requests at a higher level than
with_mock_api mocks.
Note that if you are trying to guess the mock file paths corresponding to a
test for which you intend to create a mock file manually,
instead of trying to build the URL, you should run the test
with with_mock_api as the error message will contain the mock file path.
with_mock_api() capture_requests()