feat: allow setting fail_if_no_pacts_found in honours_pacts_from_pact_broker

defaults to true, if not set (existing behaviour)

Author: bethesque

lib/pact/cli/run_pact_verification.rb

@@ -72,7 +72,6 @@ def run_with_pact_uri_object
 
       def run_with_configured_pacts_from_pact_helper
         pact_urls = Pact.provider_world.pact_urls
-        raise "Please configure a pact to verify" if pact_urls.empty?
         Pact::Provider::PactSpecRunner.new(pact_urls, pact_spec_options).run
       end
 

lib/pact/pact_broker/fetch_pact_uris_for_verification.rb

@@ -39,15 +39,17 @@ def self.call(provider, consumer_version_selectors, provider_version_branch, pro
       end
 
       def call
-        if index.can?(PACTS_FOR_VERIFICATION_RELATION) || index.can?(PACTS_FOR_VERIFICATION_RELATION_BETA)
-          log_message
-          pacts_for_verification
-        else
-          old_selectors = consumer_version_selectors.collect do | selector |
-            { name: selector[:tag], all: !selector[:latest], fallback: selector[:fallbackTag]}
+        handling_no_pacts_found do
+          if index.can?(PACTS_FOR_VERIFICATION_RELATION) || index.can?(PACTS_FOR_VERIFICATION_RELATION_BETA)
+            log_message
+            pacts_for_verification
+          else
+            old_selectors = consumer_version_selectors.collect do | selector |
+              { name: selector[:tag], all: !selector[:latest], fallback: selector[:fallbackTag]}
+            end
+            # Fall back to old method of fetching pacts
+            FetchPacts.call(provider, old_selectors, broker_base_url, http_client_options)
           end
-          # Fall back to old method of fetching pacts
-          FetchPacts.call(provider, old_selectors, broker_base_url, http_client_options)
         end
       end
 
@@ -96,6 +98,15 @@ def symbolize_keys(hash)
       def log_message
         Pact.configuration.output_stream.puts "INFO: #{pact_selection_description(provider, consumer_version_selectors, options, broker_base_url)}"
       end
+
+      def handling_no_pacts_found
+        pacts_found = yield
+        if pacts_found.empty? && options[:fail_if_no_pacts_found] != false
+          raise "No pacts found to verify"
+        else
+          pacts_found
+        end
+      end
     end
   end
 end

lib/pact/provider/configuration/pact_verification_from_broker.rb

@@ -15,7 +15,7 @@ class PactVerificationFromBroker
         # in parent scope, it will clash with these ones,
         # so put an underscore in front of the name to be safer.
 
-        attr_accessor :_provider_name, :_pact_broker_base_url, :_consumer_version_tags, :_provider_version_branch, :_provider_version_tags, :_basic_auth_options, :_enable_pending, :_include_wip_pacts_since, :_verbose, :_consumer_version_selectors
+        attr_accessor :_provider_name, :_pact_broker_base_url, :_consumer_version_tags, :_provider_version_branch, :_provider_version_tags, :_basic_auth_options, :_enable_pending, :_include_wip_pacts_since, :_verbose, :_consumer_version_selectors, :_fail_if_no_pacts_found
 
         def initialize(provider_name, provider_version_branch, provider_version_tags)
           @_provider_name = provider_name
@@ -26,6 +26,7 @@ def initialize(provider_name, provider_version_branch, provider_version_tags)
           @_enable_pending = false
           @_include_wip_pacts_since = nil
           @_verbose = false
+          @_fail_if_no_pacts_found = true # CLI defaults to false, unfortunately for consistency
         end
 
         dsl do
@@ -46,6 +47,11 @@ def enable_pending enable_pending
             self._enable_pending = enable_pending
           end
 
+          # Underlying code defaults to true if not specified
+          def fail_if_no_pacts_found fail_if_no_pacts_found
+            self._fail_if_no_pacts_found = fail_if_no_pacts_found
+          end
+
           def include_wip_pacts_since since
             self._include_wip_pacts_since = if since.respond_to?(:xmlschema)
               since.xmlschema
@@ -74,7 +80,7 @@ def create_pact_verification
             _provider_version_tags,
             _pact_broker_base_url,
             _basic_auth_options.merge(verbose: _verbose),
-            { include_pending_status: _enable_pending, include_wip_pacts_since: _include_wip_pacts_since }
+            { include_pending_status: _enable_pending, include_wip_pacts_since: _include_wip_pacts_since, fail_if_no_pacts_found: _fail_if_no_pacts_found }
           )
 
           Pact.provider_world.add_pact_uri_source fetch_pacts