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Feature: URI without param(s)
A common source of difficulty when using VCR with the default matchers
are non-deterministic URIs. If the URI changes on every test run (because
it includes a timestamp parameter, or whatever), the default URI matcher
will not work well for you.
You can write a custom matcher to match URIs however you want, but for the
common need to match on a URI and ignore particular query parameters, VCR
provides an easier way:
:match_requests_on => [
:method,
VCR.request_matchers.uri_without_param(:timestamp)
]
`uri_without_param` also has a plural alias (i.e. `uri_without_params(:timestamp, :session)`)
Background:
Given a previously recorded cassette file "cassettes/example.yml" with:
"""
---
http_interactions:
- request:
method: get
uri: http://example.com/search?q=foo&timestamp=1316920490
body:
encoding: UTF-8
string: ""
headers: {}
response:
status:
code: 200
message: OK
headers:
Content-Length:
- "12"
body:
encoding: UTF-8
string: foo response
http_version: "1.1"
recorded_at: Tue, 01 Nov 2011 04:58:44 GMT
- request:
method: get
uri: http://example.com/search?q=bar&timestamp=1296723437
body:
encoding: UTF-8
string: ""
headers: {}
response:
status:
code: 200
message: OK
headers:
Content-Length:
- "12"
body:
encoding: UTF-8
string: bar response
http_version: "1.1"
recorded_at: Tue, 01 Nov 2011 04:58:44 GMT
recorded_with: VCR 2.0.0
"""
Scenario: Match the URI on all but the timestamp query parameter
And a file named "uri_without_param_matcher.rb" with:
"""ruby
include_http_adapter_for("net/http")
require 'vcr'
VCR.configure do |c|
c.hook_into :fakeweb
c.cassette_library_dir = 'cassettes'
c.default_cassette_options = {
:match_requests_on => [:method,
VCR.request_matchers.uri_without_param(:timestamp)]
}
end
def search_uri(q)
"http://example.com/search?q=#{q}&timestamp=#{Time.now.to_i}"
end
VCR.use_cassette('example') do
puts "Response for bar: " +
response_body_for(:get, search_uri("bar"))
end
VCR.use_cassette('example') do
puts "Response for foo: " +
response_body_for(:get, search_uri("foo"))
end
"""
When I run `ruby uri_without_param_matcher.rb`
Then it should pass with:
"""
Response for bar: bar response
Response for foo: foo response
"""
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