test: fix ordering problem in test

spec/lib/pact_broker/matrix/repository_spec.rb

@@ -32,15 +32,15 @@ def build_selectors(hash)
           end
 
           it "returns an row with a blank provider_version_number" do
-            expect(subject.first).to include consumer_name: "A",
+            expect(subject).to include_hash_matching consumer_name: "A",
               provider_name: "B",
               consumer_version_number: "1.2.3",
               provider_version_number: nil
 
-            expect(subject.last).to include consumer_name: "A",
+            expect(subject).to include_hash_matching({consumer_name: "A",
               provider_name: "C",
               consumer_version_number: "1.2.3",
-              provider_version_number: nil
+              provider_version_number: nil})
           end
 
           context "when only 2 version selectors are specified" do

spec/support/shared_examples_for_responses.rb

@@ -41,3 +41,13 @@
     expect(actual.status).to be 404
   end
 end
+
+RSpec::Matchers.define :include_hash_matching do |expected|
+  match do |array_of_hashes|
+    array_of_hashes.any? { |actual| slice(actual, expected.keys) == expected }
+  end
+
+  def slice actual, keys
+    keys.each_with_object({}) { |k, hash| hash[k] = actual[k] if actual.has_key?(k) }
+  end
+end