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More about adding a collaboratorRequest matching
In order to properly replay previously recorded requests, VCR must match new
HTTP requests to a previously recorded one. By default, it matches on HTTP
method and URI, since that is usually deterministic and fully identifies the
resource and action for typical RESTful APIs.
You can customize how VCR matches requests using the :match_requests_on option.
Specify an array of attributes to match on. Supported attributes are:
:method- The HTTP method (i.e. GET, POST, PUT or DELETE) of the request.:uri- The full URI of the request.:host- The host of the URI. You can use this (alone, or in combination with:path) as an alternative to:urito cause VCR to match using a regex that matches the host.:path- The path of the URI. You can use this (alone, or in combination with:host) as an alternative to:urito cause VCR to match using a regex that matches the path.:body- The body of the request. (Unsupported when you use FakeWeb.):headers- The request headers. (Unsupported when you use FakeWeb.)
Alternately, you can manually edit a cassette and change a URI to the YAML
of a regular expression.
When a cassette contains multiple HTTP interactions containing identical
match attributes, the responses are sequenced: the first matching request
will get the first response, the second matching request will get the
second response, etc.
- Scenarios
-
- identical requests rotate through different matching responses
- match on host and path (to ignore query params)
- match on request body
- match on request headers
- Use a regex for the request URI
- identical requests rotate through different matching responses
-
- Given
-
a previously recorded cassette file "cassettes/example.yml" with:
--- - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: http://example.com:80/foo body: headers: response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "10" body: Response 1 http_version: "1.1" - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: http://example.com:80/foo body: headers: response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "10" body: Response 2 http_version: "1.1" - And
-
a file named "rotate_responses.rb" with:
require 'vcr_cucumber_helpers' include_http_adapter_for("http_lib") require 'vcr' VCR.config do |c| c.stub_with stub_with c.cassette_library_dir = 'cassettes' end VCR.use_cassette('example', :record => :none) do puts response_body_for(:get, 'http://example.com/foo') puts response_body_for(:get, 'http://example.com/foo') end - When
- I run "ruby rotate_responses.rb"
- Then
-
it should pass with:
Response 1 Response 2
Examples: stub_with http_lib :fakeweb net/http :webmock net/http :webmock httpclient :webmock patron :webmock curb :webmock em-http-request :typhoeus typhoeus :excon excon - match on host and path (to ignore query params)
-
- Given
-
a previously recorded cassette file "cassettes/example.yml" with:
--- - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: http://bar.com:80/foo?date=2010-11-09 body: headers: response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "16" body: bar.com response http_version: "1.1" - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: http://foo.com:80/bar?date=2010-11-10 body: headers: response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "16" body: foo.com response http_version: "1.1" - And
-
a file named "host_path_matching.rb" with:
require 'vcr_cucumber_helpers' include_http_adapter_for("http_lib") require 'vcr' VCR.config do |c| c.stub_with stub_with c.cassette_library_dir = 'cassettes' end VCR.use_cassette('example', :record => :none, :match_requests_on => [:host, :path]) do puts response_body_for(:post, "http://foo.com/bar?date=#{Date.today.to_s}") puts response_body_for(:put, "http://bar.com/foo?date=#{Date.today.to_s}") end - When
- I run "ruby host_path_matching.rb"
- Then
-
it should pass with:
foo.com response bar.com response
Examples: stub_with http_lib :fakeweb net/http :webmock net/http :webmock httpclient :webmock patron :webmock curb :webmock em-http-request :typhoeus typhoeus :excon excon - match on request body
-
- Given
-
a previously recorded cassette file "cassettes/example.yml" with:
--- - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :post uri: http://example.com:80/ body: a=1 headers: content-type: - application/x-www-form-urlencoded response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "12" body: a=1 response http_version: "1.1" - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :post uri: http://example.com:80/ body: a=2 headers: content-type: - application/x-www-form-urlencoded response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "12" body: a=2 response http_version: "1.1" - And
-
a file named "body_matching.rb" with:
require 'vcr_cucumber_helpers' include_http_adapter_for("http_lib") require 'vcr' VCR.config do |c| c.stub_with stub_with c.cassette_library_dir = 'cassettes' end VCR.use_cassette('example', :record => :none, :match_requests_on => [:method, :uri, :body]) do puts response_body_for(:post, "http://example.com/", 'a=2') puts response_body_for(:post, "http://example.com/", 'a=1') end - When
- I run "ruby body_matching.rb"
- Then
-
it should pass with:
a=2 response a=1 response
Examples: stub_with http_lib :webmock net/http :webmock httpclient :webmock patron :webmock curb :webmock em-http-request :typhoeus typhoeus :excon excon - match on request headers
-
- Given
-
a previously recorded cassette file "cassettes/example.yml" with:
--- - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: http://example.com:80/dashboard body: headers: x-user-id: - "17" response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "16" body: user 17 response http_version: "1.1" - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: http://example.com:80/dashboard body: headers: x-user-id: - "42" response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "16" body: user 42 response http_version: "1.1" - And
-
a file named "header_matching.rb" with:
require 'vcr_cucumber_helpers' include_http_adapter_for("http_lib") require 'vcr' VCR.config do |c| c.stub_with stub_with c.cassette_library_dir = 'cassettes' end VCR.use_cassette('example', :record => :none, :match_requests_on => [:method, :uri, :headers]) do puts response_body_for(:get, "http://example.com/dashboard", nil, 'X-User-Id' => '42') puts response_body_for(:get, "http://example.com/dashboard", nil, 'X-User-Id' => '17') end - When
- I run "ruby header_matching.rb"
- Then
-
it should pass with:
user 42 response user 17 response
Examples: stub_with http_lib :webmock net/http :webmock httpclient :webmock patron :webmock curb :webmock em-http-request :typhoeus typhoeus :excon excon - Use a regex for the request URI
-
- Given
-
a previously recorded cassette file "cassettes/example.yml" with:
--- - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: !ruby/regexp /^http:\/\/bar\.com\/foo/ body: headers: response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "16" body: bar.com response http_version: "1.1" - !ruby/struct:VCR::HTTPInteraction request: !ruby/struct:VCR::Request method: :get uri: !ruby/regexp /^http:\/\/foo\.com\/bar/ body: headers: response: !ruby/struct:VCR::Response status: !ruby/struct:VCR::ResponseStatus code: 200 message: OK headers: content-length: - "16" body: foo.com response http_version: "1.1" - And
-
a file named "uri_regex_matching.rb" with:
require 'vcr_cucumber_helpers' include_http_adapter_for("http_lib") require 'vcr' VCR.config do |c| c.stub_with stub_with c.cassette_library_dir = 'cassettes' end VCR.use_cassette('example', :record => :none) do puts response_body_for(:get, "http://foo.com/bar?date=#{Date.today.to_s}") puts response_body_for(:get, "http://bar.com/foo?date=#{Date.today.to_s}") end - When
- I run "ruby uri_regex_matching.rb"
- Then
-
it should pass with:
foo.com response bar.com response
Examples: stub_with http_lib :fakeweb net/http :webmock net/http :webmock httpclient :webmock patron :webmock curb :webmock em-http-request :typhoeus typhoeus
Last published over 6 years ago by myronmarston.