fix: use .empty? in handling_no_pacts_found

Author: YOU54F

lib/pact/pact_broker/fetch_pact_uris_for_verification.rb

@@ -101,8 +101,8 @@ def log_message
 
       def handling_no_pacts_found
         pacts_found = yield
-        raise "No pacts found to verify" if pacts_found.blank? && options[:fail_if_no_pacts_found] != false
-        if pacts_found.blank? && options[:fail_if_no_pacts_found] == false
+        raise "No pacts found to verify" if pacts_found.empty? && options[:fail_if_no_pacts_found] != false
+        if pacts_found.empty? && options[:fail_if_no_pacts_found] == false
           Pact.configuration.output_stream.puts "WARN: No pacts found to verify & fail_if_no_pacts_found is set to false."
         end
         pacts_found

spec/lib/pact/pact_broker/fetch_pact_uris_for_verification_spec.rb

@@ -49,7 +49,7 @@ module PactBroker
 
         context "when the beta:provider-pacts-for-verification relation does not exist" do
           before do
-            allow(FetchPacts).to receive(:call)
+            allow(FetchPacts).to receive(:call).and_return([])
             stub_request(:get, "http://broker.org/").to_return(status: 200, body: response_body, headers: response_headers)
           end