Fix RSpec/ChangeByZero cop to handle invalid change matcher usage

issue number: #2069

Author: rito.ishihara

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Fix false positive in `RSpec/Pending`, where it would mark the default block `it` as an offense. ([@bquorning])
 - Fix issue when `Style/ContextWording` is configured with a Prefix being interpreted as a boolean, like `on`. ([@sakuro])
 - Add new `RSpec/IncludeExamples` cop to enforce using `it_behaves_like` over `include_examples`. ([@dvandersluis])
+- Fix an error `RSpec/ChangeByZero` cop when without expect block. ([@lee266])
 
 ## 3.5.0 (2025-02-16)
 
@@ -1002,6 +1003,7 @@ Compatibility release so users can upgrade RuboCop to 0.51.0. No new features.
 [@krororo]: https://github.com/krororo
 [@kuahyeow]: https://github.com/kuahyeow
 [@lazycoder9]: https://github.com/lazycoder9
+[@lee266]: https://github.com/lee266
 [@leoarnold]: https://github.com/leoarnold
 [@liberatys]: https://github.com/Liberatys
 [@lokhi]: https://github.com/lokhi

lib/rubocop/cop/rspec/change_by_zero.rb

@@ -102,6 +102,8 @@ def on_send(node)
         private
 
         def register_offense(node, change_node)
+          return unless node.parent.send_type?
+
           if compound_expectations?(node)
             add_offense(node,
                         message: message_compound(change_node)) do |corrector|
@@ -116,8 +118,7 @@ def register_offense(node, change_node)
         end
 
         def compound_expectations?(node)
-          node.parent.send_type? &&
-            %i[and or & |].include?(node.parent.method_name)
+          %i[and or & |].include?(node.parent.method_name)
         end
 
         def message(change_node)

spec/rubocop/cop/rspec/change_by_zero_spec.rb

@@ -366,4 +366,12 @@
       end
     RUBY
   end
+
+  it 'does not register an offense when without expect block' do
+    expect_no_offenses(<<~RUBY)
+      it do
+        change(foo, :bar).by(0)
+      end
+    RUBY
+  end
 end