feat(wip pacts): experimental feature - if no provider versions exist…

…, consider all head pacts wip

To enable this feature, set PACT_BROKER_FEATURES=experimental_no_provider_versions_makes_all_head_pacts_wip

lib/pact_broker/pacts/repository.rb

@@ -17,6 +17,7 @@
 require 'pact_broker/pacts/selected_pact'
 require 'pact_broker/pacts/selector'
 require 'pact_broker/pacts/selectors'
+require 'pact_broker/feature_toggle'
 
 module PactBroker
   module Pacts
@@ -214,14 +215,15 @@ def find_wip_pact_versions_for_provider provider_name, provider_tags_names = [],
           .where(name: provider_tags_names)
           .all
 
-        wip_pacts.collect do | pact|
+        provider_version_count = scope_for(PactBroker::Domain::Version).where(pacticipant: provider).count
 
+        wip_pacts.collect do | pact|
           pending_tag_names = find_provider_tags_for_which_pact_publication_id_is_pending(pact, successfully_verified_head_pact_publication_ids_for_each_provider_tag)
           pre_existing_tag_names = find_provider_tag_names_that_were_first_used_before_pact_published(pact, provider_tag_collection)
 
           pre_existing_pending_tags = pending_tag_names & pre_existing_tag_names
 
-          if pre_existing_pending_tags.any?
+          if pre_existing_pending_tags.any? || (PactBroker.feature_enabled?(:experimental_no_provider_versions_makes_all_head_pacts_wip) && provider_version_count == 0)
             selectors = Selectors.create_for_latest_of_each_tag(pact.head_tag_names)
             VerifiablePact.new(pact.to_domain, selectors, true, pre_existing_pending_tags, [], true)
           end

spec/lib/pact_broker/pacts/repository_find_wip_pact_versions_for_provider_spec.rb

@@ -228,17 +228,30 @@ module Pacts
           end
         end
 
-        context "when the provider tag does not exist yet" do
+        context "when the provider tag does not exist yet and there are no provider versions" do
           before do
             td.create_pact_with_hierarchy("foo", "1", "bar")
               .create_consumer_version_tag("feat-x")
           end
 
+          it "is included" do
+            expect(subject.size).to be 1
+          end
+        end
+
+        context "when the provider tag does not exist yet but there are other provider versions" do
+          before do
+            td.create_pact_with_hierarchy("foo", "1", "bar")
+              .create_consumer_version_tag("feat-x")
+              .create_provider_version("1")
+          end
+
           it "doesn't return any pacts" do
             expect(subject.size).to be 0
           end
         end
 
+
         context "when a pact was published between the first creation date of two provider tags" do
           let(:provider_tags) { %w[dev feat-1] }