feat(generators): Pass provider state results back so we can use Prov…

…iderState generator

lib/pact/provider_verifier/set_up_provider_state.rb

@@ -28,6 +28,11 @@ def call
         log_request
         response = post_to_provider_state
         check_for_error response
+        begin
+          JSON.parse(response.body)
+        rescue
+          {}
+        end
       end
 
       private
@@ -49,11 +54,11 @@ def post_to_provider_state
           # https://github.com/pact-foundation/pact-go/issues/42
           # eg. https://ci.appveyor.com/project/mefellows/pact-go/build/25#L1202
 
+
           faraday.request :retry, max: 2, interval: 0.05,
             interval_randomness: 0.5, backoff_factor: 2,
             methods:[:post],
             exceptions: [Faraday::ConnectionFailed]
-
           faraday.response :logger if verbose
           faraday.adapter Faraday.default_adapter
         end

spec/integration_with_provider_state_spec.rb

@@ -0,0 +1,23 @@
+require 'json'
+
+describe "pact-provider-verifier with a provider state injected to a pact file" do
+  before(:all) do
+    @pipe = IO.popen("bundle exec rackup -p 5837 spec/support/provider_with_state_generator.rb")
+    sleep 2
+  end
+
+  subject { `bundle exec bin/pact-provider-verifier spec/support/pacts/pact-with-provider-state.json -a 1 --provider-base-url http://localhost:5837/ --provider-states-setup-url http://localhost:5837/provider_state -v` }
+
+  it "exits with a 0 exit code" do
+    subject
+    expect($?).to eq 0
+  end
+
+  it "the output contains a success message" do
+    expect(subject).to include "1 interaction, 0 failures"
+  end
+
+  after(:all) do
+    Process.kill 'KILL', @pipe.pid
+  end
+end

spec/lib/pact/provider_verifier/set_up_provider_state_inject_parameters_spec.rb

@@ -0,0 +1,67 @@
+require 'pact/provider_verifier/set_up_provider_state'
+require 'webmock/rspec'
+
+module Pact
+  module ProviderVerifier
+
+    describe SetUpProviderState do
+
+      let(:provider_states_setup_url) { 'http://foo' }
+      let(:provider_state) { 'some state' }
+      let(:consumer) { 'Foo' }
+      let(:options) { { params: params } }
+      let(:params) { { "foo" => "bar" }}
+      subject { SetUpProviderState.call(provider_state, consumer, options) }
+
+      before do
+        ENV['PROVIDER_STATES_SETUP_URL'] = provider_states_setup_url
+        stub_request(:post, provider_states_setup_url)
+        allow($stdout).to receive(:puts)
+        allow($stderr).to receive(:puts)
+      end
+
+      it "makes a HTTP request to the configured URL with a JSON body containing the consumer and provider state names" do
+        subject
+        expect(WebMock).to have_requested(:post, provider_states_setup_url).
+          with(body: {consumer: consumer, state: provider_state, states: [provider_state], params: params}, headers: {'Content-Type' => "application/json"})
+      end
+
+      context "when an error is returned from the request to the setup URL" do
+        before do
+          stub_request(:post, provider_states_setup_url).to_return(status: 500, body: "Some error")
+        end
+
+        it "raises an error" do
+          expect { subject }.to raise_error(SetUpProviderStateError, /500.*Some error/)
+        end
+      end
+
+      context "when the provider_states_setup_url is nil" do
+        before do
+          ENV['PROVIDER_STATES_SETUP_URL'] = nil
+        end
+
+        it "does not make a HTTP request" do
+          subject
+          expect(WebMock).to_not have_requested(:post, provider_states_setup_url)
+        end
+
+        context "when a provider_state is present" do
+          it "logs a warning" do
+            expect($stderr).to receive(:puts).with("WARN: Skipping set up for provider state 'some state' for consumer 'Foo' as there is no --provider-states-setup-url specified.")
+            subject
+          end
+        end
+
+        context "when a provider_state is not present" do
+          let(:provider_state) { nil }
+
+          it "does not log a warning" do
+            expect($stderr).to_not receive(:puts)
+            subject
+          end
+        end
+      end
+    end
+  end
+end

spec/support/pacts/pact-with-provider-state.json

@@ -0,0 +1,42 @@
+{
+  "provider": {
+    "name": "Foo"
+  },
+  "consumer": {
+    "name": "Bar"
+  },
+  "interactions": [
+    {
+      "description": "returns book detail",
+      "request": {
+        "method": "GET",
+        "path": "/book/1",
+        "generators": {
+          "path": {
+            "type": "ProviderState",
+            "expression": "/book/${id}"
+          }
+        }
+      },
+      "response": {
+        "status": 200,
+        "body": {
+          "name": "Injected Book"
+        }
+      },
+      "providerStates": [
+        {
+          "name": "returns book detail"
+        }
+      ]
+    }
+  ],
+  "metadata": {
+    "pactSpecification": {
+      "version": "3.0.0"
+    },
+    "pact-jvm": {
+      "version": "4.0.5"
+    }
+  }
+}

spec/support/provider_with_state_generator.rb

@@ -0,0 +1,19 @@
+require 'sinatra'
+require 'sinatra/base'
+require 'sinatra/json'
+require 'json'
+
+class ProviderWithStateGenerator < Sinatra::Base
+  post '/provider_state' do
+    json :id => 2
+  end
+
+  get '/book/1' do
+    json :id => 1, :name => 'Unexpected Book'
+  end
+
+  get '/book/2' do
+    json :id => 2, :name => 'Injected Book'
+  end
+
+end