Fix an offense creation for Lint/EmptyFile

CHANGELOG.md

@@ -12,6 +12,7 @@
 * [#8627](https://github.com/rubocop-hq/rubocop/issues/8627): Fix a false positive for `Lint/DuplicateRequire` when same feature argument but different require method. ([@koic][])
 * [#8674](https://github.com/rubocop-hq/rubocop/issues/8674): Fix an error for `Layout/EmptyLineAfterMultilineCondition` when conditional is at the top level. ([@fatkodima][])
 * [#8658](https://github.com/rubocop-hq/rubocop/pull/8658): Fix a false positive for `Style/RedundantSelfAssignment` when calling coercion methods. ([@fatkodima][])
+* [#8669](https://github.com/rubocop-hq/rubocop/issues/8669): Fix an offense creation for `Lint/EmptyFile`. ([@fatkodima][])
 * [#8607](https://github.com/rubocop-hq/rubocop/issues/8607): Fix a false positive for `Lint/UnreachableLoop` when conditional branch includes continue statement preceding break statement. ([@fatkodima][])
 * [#8572](https://github.com/rubocop-hq/rubocop/issues/8572): Fix a false positive for `Style/RedundantParentheses` when parentheses are used like method argument parentheses. ([@koic][])
 * [#8630](https://github.com/rubocop-hq/rubocop/issues/8630): Fix some false positives for `Style/HashTransformKeys` and `Style/HashTransformValues` when the receiver is an array. ([@eugeneius][])

lib/rubocop/cop/lint/empty_file.rb

@@ -26,10 +26,7 @@ class EmptyFile < Base
         MSG = 'Empty file detected.'
 
         def on_new_investigation
-          return unless offending?
-
-          range = source_range(processed_source.buffer, 1, 0)
-          add_offense(range)
+          add_global_offense(MSG) if offending?
         end
 
         private

spec/rubocop/cop/lint/empty_file_spec.rb

@@ -1,16 +1,18 @@
 # frozen_string_literal: true
 
 RSpec.describe RuboCop::Cop::Lint::EmptyFile, :config do
-  subject(:cop) { described_class.new(config) }
-
+  let(:commissioner) { RuboCop::Cop::Commissioner.new([cop]) }
+  let(:offenses) { commissioner.investigate(processed_source).offenses }
   let(:cop_config) do
     { 'AllowComments' => true }
   end
+  let(:source) { '' }
 
   it 'registers an offense when the file is empty' do
-    expect_offense(<<~RUBY)
-      ^ Empty file detected.
-    RUBY
+    expect(offenses.size).to eq(1)
+    offense = offenses.first
+    expect(offense.message).to eq('Empty file detected.')
+    expect(offense.severity).to eq(:warning)
   end
 
   it 'does not register an offense when the file contains code' do
@@ -29,12 +31,10 @@
     let(:cop_config) do
       { 'AllowComments' => false }
     end
+    let(:source) { '# comment' }
 
     it 'registers an offense when the file contains comments' do
-      expect_offense(<<~RUBY)
-        # comment
-        ^ Empty file detected.
-      RUBY
+      expect(offenses.size).to eq(1)
     end
   end
 end