extract mock env to be reused

Author: stefannibrasil

.github/workflows/ruby.yml

@@ -39,7 +39,7 @@ jobs:
     env:
       BUNDLE_WITHOUT: benchmark
     strategy:
-      fail-fast: false
+      fail-fast: false # don't fail all matrix builds if one fails
       matrix:
         ruby:
           - '3.1'

test/support/mock_env.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+def mock_env(partial_env_hash)
+  old = ENV.to_hash
+  ENV.update partial_env_hash
+  begin
+    yield
+  ensure
+    ENV.replace old
+  end
+end

test/test_faker.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require_relative 'test_helper'
+require_relative 'support/mock_env'
 
 module Faker
   class TestFake
@@ -163,14 +164,4 @@ def test_unique
 
     assert_equal(unique_numbers.uniq, unique_numbers)
   end
-
-  def mock_env(partial_env_hash)
-    old = ENV.to_hash
-    ENV.update partial_env_hash
-    begin
-      yield
-    ensure
-      ENV.replace old
-    end
-  end
 end