Refactor modeling spec to use a new "a_record_matching" matcher

spec/models/pet_spec.rb

@@ -1,5 +1,6 @@
 require 'rails_helper'
-require_relative '../mocks/custom_pets'
+require_relative '../support/mocks/custom_pets'
+require_relative '../support/matchers/a_record_matching'
 
 RSpec.describe Pet, type: :model do
   fixtures :colors, :species, :zones
@@ -30,33 +31,40 @@ RSpec.describe Pet, type: :model do
       it "has new assets for the biology layers" do
         subject.save! # TODO: I wish this were set up before saving.
 
-        s = subject.pet_state.swf_assets.sort_by(&:id)
-
-        expect(s.size).to eq 4
-        expect(s[0].type).to eq "biology"
-        expect(s[0].remote_id).to eq 10083
-        expect(s[0].zone_id).to eq 37
-        expect(s[0].url).to eq "https://images.neopets.com/cp/bio/swf/000/000/010/10083_8a1111a13f.swf"
-        expect(s[0].manifest_url).to eq "https://images.neopets.com/cp/bio/data/000/000/010/10083_8a1111a13f/manifest.json"
-        expect(s[0].zones_restrict).to eq "0000000000000000000000000000000000000000000000000000"
-        expect(s[1].type).to eq "biology"
-        expect(s[1].remote_id).to eq 11613
-        expect(s[1].zone_id).to eq 15
-        expect(s[1].url).to eq "https://images.neopets.com/cp/bio/swf/000/000/011/11613_f7d8d377ab.swf"
-        expect(s[1].manifest_url).to eq "https://images.neopets.com/cp/bio/data/000/000/011/11613_f7d8d377ab/manifest.json"
-        expect(s[1].zones_restrict).to eq "0000000000000000000000000000000000000000000000000000"
-        expect(s[2].type).to eq "biology"
-        expect(s[2].remote_id).to eq 14187
-        expect(s[2].zone_id).to eq 34
-        expect(s[2].url).to eq "https://images.neopets.com/cp/bio/swf/000/000/014/14187_0e65c2082f.swf"
-        expect(s[2].manifest_url).to eq "https://images.neopets.com/cp/bio/data/000/000/014/14187_0e65c2082f/manifest.json"
-        expect(s[2].zones_restrict).to eq "0000000000000000000000000000000000000000000000000000"
-        expect(s[3].type).to eq "biology"
-        expect(s[3].remote_id).to eq 14189
-        expect(s[3].zone_id).to eq 33
-        expect(s[3].url).to eq "https://images.neopets.com/cp/bio/swf/000/000/014/14189_102e4991e9.swf"
-        expect(s[3].manifest_url).to eq "https://images.neopets.com/cp/bio/data/000/000/014/14189_102e4991e9/manifest.json"
-        expect(s[3].zones_restrict).to eq "0000000000000000000000000000000000000000000000000000"        
+        expect(subject.pet_state.swf_assets).to contain_exactly(
+          a_record_matching(
+            type: "biology",
+            remote_id: 10083,
+            zone_id: 37,
+            url: "https://images.neopets.com/cp/bio/swf/000/000/010/10083_8a1111a13f.swf",
+            manifest_url: "https://images.neopets.com/cp/bio/data/000/000/010/10083_8a1111a13f/manifest.json",
+            zones_restrict: "0000000000000000000000000000000000000000000000000000",
+          ),
+          a_record_matching(
+            type: "biology",
+            remote_id: 11613,
+            zone_id: 15,
+            url: "https://images.neopets.com/cp/bio/swf/000/000/011/11613_f7d8d377ab.swf",
+            manifest_url: "https://images.neopets.com/cp/bio/data/000/000/011/11613_f7d8d377ab/manifest.json",
+            zones_restrict: "0000000000000000000000000000000000000000000000000000",
+          ),
+          a_record_matching(
+            type: "biology",
+            remote_id: 14187,
+            zone_id: 34,
+            url: "https://images.neopets.com/cp/bio/swf/000/000/014/14187_0e65c2082f.swf",
+            manifest_url: "https://images.neopets.com/cp/bio/data/000/000/014/14187_0e65c2082f/manifest.json",
+            zones_restrict: "0000000000000000000000000000000000000000000000000000",
+          ),
+          a_record_matching(
+            type: "biology",
+            remote_id: 14189,
+            zone_id: 33,
+            url: "https://images.neopets.com/cp/bio/swf/000/000/014/14189_102e4991e9.swf",
+            manifest_url: "https://images.neopets.com/cp/bio/data/000/000/014/14189_102e4991e9/manifest.json",
+            zones_restrict: "0000000000000000000000000000000000000000000000000000",
+          )
+        )
       end
     end
   end

spec/spec_helper.rb

@@ -11,6 +11,11 @@ RSpec.configure do |config|
     # ...rather than:
     #     # => "be bigger than 2"
     expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+
+    # Some of our SWF assets are long, and we want all of it when diffing!
+    # Here, I picked a large number, to approximate "any length" but not
+    # actually allow infinity.
+    expectations.max_formatted_output_length = 3000
   end
 
   # rspec-mocks config goes here. You can use an alternate test double

spec/support/matchers/a_record_matching.rb

@@ -0,0 +1,7 @@
+RSpec::Matchers.define :a_record_matching do |expected|
+  match do |actual|
+    expected.all? do |attr_name, expected_value|
+      actual.read_attribute(attr_name) == expected_value
+    end
+  end
+end

spec/support/mocks/custom_pets.rb

@@ -1,7 +1,9 @@
 # We replace Neopets::CustomPets methods with a mocked implementation.
 module Neopets::CustomPets
+  DATA_DIR = Pathname.new(__dir__) / "custom_pets"
+
   def self.fetch_viewer_data(pet_name, ...)
-    File.open(Rails.root / "spec/mocks/custom_pets/#{pet_name}.json") do |file|
+    File.open(DATA_DIR / "#{pet_name}.json") do |file|
       HashWithIndifferentAccess.new JSON.load(file)
     end
   end