Add YAMLLoader module to account for Psych v4

Reference: https://stackoverflow.com/a/71192990

Calling `YAML.load_file` on the Rails `database.yaml` file (which has a
`&default` alias in it) breaks given recent changes in Psych v4 in Ruby
3.1.

This adjustment follows [a patch that can be found in
Rails](rails/rails@179d0a1),
but extracts into a module, given `YAML.load_file` is being called in
multiple places.

Author: thewatts

lib/test_data/config.rb

@@ -1,3 +1,5 @@
+require_relative "./yaml_loader"
+
 module TestData
   def self.config(pwd: Rails.root, &blk)
     @configuration ||= Configuration.new(pwd: pwd)
@@ -95,7 +97,7 @@ def after_rails_fixture_load(callable = nil, &blk)
     end
 
     def database_yaml
-      YAML.load_file(database_yaml_full_path)
+      YAMLLoader.load_file(database_yaml_full_path)
     end
 
     def database_name

lib/test_data/configurators/cable_yaml.rb

@@ -1,3 +1,5 @@
+require_relative "../yaml_loader"
+
 module TestData
   module Configurators
     class CableYaml
@@ -8,7 +10,7 @@ def initialize
 
       def verify
         if !File.exist?(@config.cable_yaml_full_path) ||
-            YAML.load_file(@config.cable_yaml_full_path).key?("test_data")
+            YAMLLoader.load_file(@config.cable_yaml_full_path).key?("test_data")
           ConfigurationVerification.new(looks_good?: true)
         else
           ConfigurationVerification.new(problems: [

lib/test_data/configurators/secrets_yaml.rb

@@ -1,3 +1,5 @@
+require_relative "../yaml_loader"
+
 module TestData
   module Configurators
     class SecretsYaml
@@ -8,7 +10,7 @@ def initialize
 
       def verify
         if !File.exist?(@config.secrets_yaml_full_path) ||
-            YAML.load_file(@config.secrets_yaml_full_path).key?("test_data")
+            YAMLLoader.load_file(@config.secrets_yaml_full_path).key?("test_data")
           ConfigurationVerification.new(looks_good?: true)
         else
           ConfigurationVerification.new(problems: [

lib/test_data/wrap/webpacker_config.rb

@@ -1,3 +1,5 @@
+require_relative "../yaml_loader"
+
 module TestData
   module Wrap
     class WebpackerConfig
@@ -34,7 +36,7 @@ def required_entries_missing_from_test_data_config
       private
 
       def load_yaml(path)
-        YAML.load_file(path)
+        YAMLLoader.load_file(path)
       rescue
       end
     end

lib/test_data/yaml_loader.rb

@@ -0,0 +1,11 @@
+module TestData
+  module YAMLLoader
+    def self.load_file(path)
+      begin
+        YAML.load_file(path, aliases: true)
+      rescue ArgumentError
+        YAML.load_file(path)
+      end
+    end
+  end
+end