Specs: Silence deprecation warning

Before:

> Randomized with seed 53114
> .........................................................................................................................................[WARNING] Using :ruby format when importing rates is potentially unsafe and might lead to remote code execution via Marshal.load deserializer. Consider using safe alternatives such as :json and :yaml.
> ...........................................................................................................................................................................................................................................................................................................................................................................................

After:

> Randomized with seed 30224
> ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Also moved a few RSpec configuration into their own support files in order to have a more readable RSpec configuration.

Author: sunny

spec/spec_helper.rb

@@ -16,8 +16,6 @@
 
 Dir['./spec/support/**/*.rb'].sort.each { |f| require f }
 
-I18n.enforce_available_locales = false
-
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause
@@ -117,36 +115,3 @@
     Money.default_currency = Money::Currency.new("USD")
   end
 end
-
-def reset_i18n
-  I18n.backend = I18n::Backend::Simple.new
-end
-
-RSpec.shared_context "with infinite precision", :default_infinite_precision_true do
-  before do
-    Money.default_infinite_precision = true
-  end
-
-  after do
-    Money.default_infinite_precision = false
-  end
-end
-
-class Money
-  module Warning
-    def warn(message); end
-  end
-end
-
-class Money
-  include Warning
-  extend Warning
-end
-
-class Money::LocaleBackend::Base
-  include Money::Warning
-end
-
-class Money::FormattingRules
-  include Money::Warning
-end

spec/support/i18n.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+I18n.enforce_available_locales = false
+
+def reset_i18n
+  I18n.backend = I18n::Backend::Simple.new
+end

spec/support/precision.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+RSpec.shared_context "with infinite precision", :default_infinite_precision_true do
+  before do
+    Money.default_infinite_precision = true
+  end
+
+  after do
+    Money.default_infinite_precision = false
+  end
+end

spec/support/silence_warnings.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class Money
+  module Warning
+    def warn(message); end
+  end
+end
+
+class Money
+  include Warning
+  extend Warning
+end
+
+class Money::LocaleBackend::Base
+  include Money::Warning
+end
+
+class Money::FormattingRules
+  include Money::Warning
+end
+
+class Money::Bank::VariableExchange
+  include Money::Warning
+end