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Project: Vcr 2.8.0

Usage with RSpec metadata

VCR provides easy integration with RSpec using metadata. To set this
up, call configure_rspec_metadata! in your VCR.configure block.

Once you've done that, you can have an example group or example use
VCR by passing :vcr as an additional argument after the description
string. It will set the cassette name based on the example's
full description.

If you need to override the cassette name or options, you can pass a
hash (:vcr => { ... }).

Background
Given
a file named "spec/spec_helper.rb" with:
require 'vcr'

VCR.configure do |c|
  c.cassette_library_dir = 'spec/cassettes'
  c.hook_into :webmock
  c.configure_rspec_metadata!
end

RSpec.configure do |c|
  # so we can use :vcr rather than :vcr => true;
  # in RSpec 3 this will no longer be necessary.
  c.treat_symbols_as_metadata_keys_with_true_values = true
end
And
a previously recorded cassette file "spec/cassettes/Group/optionally_raises_an_error.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
Use `:vcr` metadata
Given
a file named "spec/vcr_example_spec.rb" with:
start_sinatra_app(:port => 7777) do
  get('/') { "Hello" }
end

def make_http_request
  Net::HTTP.get_response('localhost', '/', 7777).body
end

require 'spec_helper'

describe "VCR example group metadata", :vcr do
  it 'records an http request' do
    make_http_request.should == 'Hello'
  end

  it 'records another http request' do
    make_http_request.should == 'Hello'
  end

  context 'in a nested example group' do
    it 'records another one' do
      make_http_request.should == 'Hello'
    end
  end
end

describe "VCR example metadata" do
  it 'records an http request', :vcr do
    make_http_request.should == 'Hello'
  end
end
When
I run rspec spec/vcr_example_spec.rb
Then
it should pass with "4 examples, 0 failures"
And
the file "spec/cassettes/VCR_example_group_metadata/records_an_http_request.yml" should contain "Hello"
And
the file "spec/cassettes/VCR_example_group_metadata/records_another_http_request.yml" should contain "Hello"
And
the file "spec/cassettes/VCR_example_group_metadata/in_a_nested_example_group/records_another_one.yml" should contain "Hello"
And
the file "spec/cassettes/VCR_example_metadata/records_an_http_request.yml" should contain "Hello"
`:allow_unused_http_interactions => false` causes a failure if there are unused interactions
And
a file named "spec/vcr_example_spec.rb" with:
require 'spec_helper'

describe "Group", :vcr => { :allow_unused_http_interactions => false } do
  it 'optionally raises an error' do
    # don't fail
  end
end
When
I run rspec spec/vcr_example_spec.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"]
`:allow_unused_http_interactions => false` does not raise if the example already failed
And
a file named "spec/vcr_example_spec.rb" with:
require 'spec_helper'

describe "Group", :vcr => { :allow_unused_http_interactions => false } do
  it 'optionally raises an error' do
    raise "boom"
  end
end
When
I run rspec spec/vcr_example_spec.rb
Then
it should fail with "boom"
And
the output should not contain "There are unused HTTP interactions"
Pass a hash to set the cassette options
Given
a file named "spec/vcr_example_spec.rb" with:
require 'spec_helper'

vcr_options = { :cassette_name => "example", :record => :new_episodes }
describe "Using an options hash", :vcr => vcr_options do
  it 'uses the provided cassette name' do
    VCR.current_cassette.name.should == "example"
  end

  it 'sets the given options' do
    VCR.current_cassette.record_mode.should == :new_episodes
  end
end
When
I run rspec spec/vcr_example_spec.rb
Then
it should pass with "2 examples, 0 failures"

Last published over 3 years ago by myronmarston.