Logo: Relish

  1. Sign in

Project: Vcr 3.0.2

Publisher: VCR

Allow Unused HTTP Interactions

If set to false, this cassette option will cause VCR to raise an error
when a cassette is ejected and there are unused HTTP interactions remaining,
unless there is already an exception unwinding the callstack.

It verifies that all requests included in the cassette were made, and allows
VCR to function a bit like a mock object at the HTTP layer.

The option defaults to true (mostly for backwards compatibility).

Background
Given
a file named "vcr_config.rb" with: 
require 'vcr'

VCR.configure do |c|
  c.hook_into :webmock
  c.cassette_library_dir = 'cassettes'
end
And
a previously recorded cassette file "cassettes/example.yml" with: 
--- 
http_interactions: 
- request: 
    method: get
    uri: http://example.com/foo
    body: 
      encoding: UTF-8
      string: ""
    headers: {}
  response: 
    status: 
      code: 200
      message: OK
    headers: 
      Content-Length: 
      - "5"
    body: 
      encoding: UTF-8
      string: Hello
    http_version: "1.1"
  recorded_at: Tue, 01 Nov 2011 04:58:44 GMT
recorded_with: VCR 2.0.0
Scenarios
  1. Unused HTTP interactions are allowed by default
  2. Error raised if option is false and there are unused interactions
  3. No error raised if option is false and all interactions are used
  4. Does not silence other errors raised in `use_cassette` block
Unused HTTP interactions are allowed by default
Given
a file named "allowed_by_default.rb" with: 
require 'vcr_config'

VCR.use_cassette("example") do
  # no requests
end
When
I run ruby allowed_by_default.rb
Then
it should pass
Error raised if option is false and there are unused interactions
Given
a file named "disallowed_with_no_requests.rb" with: 
require 'vcr_config'

VCR.use_cassette("example", :allow_unused_http_interactions => false) do
  # no requests
end
When
I run ruby disallowed_with_no_requests.rb
Then
it should fail with an error like: 
There are unused HTTP interactions left in the cassette:
  - [get http://example.com/foo] => [200 "Hello"]
No error raised if option is false and all interactions are used
Given
a file named "disallowed_with_all_requests.rb" with: 
require 'vcr_config'

VCR.use_cassette("example", :allow_unused_http_interactions => false) do
  Net::HTTP.get_response(URI("http://example.com/foo"))
end
When
I run ruby disallowed_with_all_requests.rb
Then
it should pass
Does not silence other errors raised in `use_cassette` block
Given
a file named "does_not_silence_other_errors.rb" with: 
require 'vcr_config'

VCR.use_cassette("example", :allow_unused_http_interactions => false) do
  raise "boom"
end
When
I run ruby does_not_silence_other_errors.rb
Then
it should fail with "boom"
And
the output should not contain "There are unused HTTP interactions"

Last published almost 5 years ago by Tony Miller.